If you want the best iPhone 15 screen protector, choose one that combines durable tempered glass, easy installation, excellent touch sensitivity, and reliable everyday protection. After comparing build quality, installation systems, value, customer feedback, and overall durability, the recommendations below stand out for different needs, whether you want premium protection, the easiest installation, or the best budget-friendly option. If you’re also comparing newer models, our guide to choosing the right iPhone screen protector explains how size and compatibility affect your purchase.
The best iPhone 15 screen protectors use high-quality tempered glass with at least 9H hardness, excellent optical clarity, strong case compatibility, and an installation system that minimizes bubbles. Premium options also include reinforced edges, oleophobic coatings, and auto-alignment frames for faster installation.
Featured Products
Spigen GlasTR EZ FIT Screen Protector for iPhone 16/15
Best For: Best Overall (Editor’s Choice)
SPIGEN
Spigen GlasTR EZ FIT Screen Protector for iPhone 16/15
The Spigen GlasTR EZ FIT is the top overall recommendation because it balances premium tempered glass protection, reliable touch sensitivity, and one of the easiest installation systems available. Its auto-alignment tray and case-friendly design make it an excellent choice for most iPhone 15 owners.
Who Should Buy It
Ideal for users who want premium everyday protection with a simple installation process. It's especially suitable for first-time screen protector buyers.
Why We Pick It
It earned the Best Overall position thanks to its dependable build quality, proven installation system, and consistent long-term performance.
Features & Benefits
| Feature | Benefit |
|---|---|
| EZ FIT Auto-Alignment Tray | ensures fast and accurate installation |
| 9H Tempered Glass | resists everyday scratches and impacts |
| Case-Friendly Design | works with most protective cases without lifting |
Pros & Cons
| Pros | Cons |
|---|---|
| โ Easy bubble-free installation | โ Higher price than budget options |
| โ Premium build quality | โ Only includes two protectors |
| โ Excellent touch responsiveness |
TOCOL for iPhone 15 Screen Protector (Clear)
Best For: Best for Easy Installation
TOCOL
TOCOL for iPhone 15 Screen Protector, Clear
TOCOL stands out for its installation experience by combining an automatic alignment system with durable tempered glass. It provides strong protection while making installation simple even for beginners.
Who Should Buy It
Best for anyone who wants the easiest possible installation with minimal risk of dust or bubbles. It's also suitable for users replacing protectors frequently.
Why We Pick It
It earned its recommendation because the guide emphasizes its innovative installation system alongside reliable protection and strong customer satisfaction.
Features & Benefits
| Feature | Benefit |
|---|---|
| Auto Installation System | simplifies alignment in seconds |
| 9H+ Tempered Glass | protects against scratches and daily impacts |
| Military-Grade Shatter Resistance | improves durability during everyday use |
Pros & Cons
| Pros | Cons |
|---|---|
| โ Extremely easy installation | โ Two-pack only |
| โ Excellent customer ratings | โ Clear version lacks privacy protection |
| โ Strong scratch resistance |
Ailun Screen Protector + Camera Lens Protector (3+3 Pack)
Best For: Best Budget & Best Value
AILUN
Ailun Screen Protector + Camera Lens Protector for iPhone 15, 3+3 Pack
The Ailun 3+3 Pack delivers exceptional value by combining multiple tempered glass protectors with camera lens protectors in one affordable bundle. It offers dependable everyday protection while keeping replacement costs low.
Who Should Buy It
Perfect for budget-conscious buyers, families, or anyone wanting spare protectors for future replacements. It's also ideal for users who prefer camera lens protection in the same package.
Why We Pick It
It earned its place because it delivers the best balance of affordability, included accessories, and outstanding customer feedback.
Features & Benefits
| Feature | Benefit |
|---|---|
| 3+3 Bundle | includes screen and camera lens protectors |
| 9H Tempered Glass | protects against scratches and impacts |
| Installation Frame | helps achieve accurate placement |
Pros & Cons
| Pros | Cons |
|---|---|
| โ Outstanding value | โ Not as premium as flagship brands |
| โ Includes camera lens protectors | โ Designed specifically for the standard iPhone 15 |
| โ Huge number of positive reviews |
amFilm OneTouch for iPhone 15 Screen Protector
Best For: Best Auto-Alignment Installation
AMFILM
amFilm OneTouch for iPhone 15 Screen Protector 6.1'' Tempered Glass
amFilm OneTouch focuses on making installation nearly effortless through its patented auto-alignment system while maintaining excellent clarity and scratch protection. The included camera lens protectors further improve its overall value.
Who Should Buy It
Recommended for users who prioritize a quick, frustration-free installation experience without sacrificing protection. It is also suitable for first-time installers.
Why We Pick It
It earned its recommendation because its OneTouch installation system consistently reduces alignment errors and trapped bubbles.
Features & Benefits
| Feature | Benefit |
|---|---|
| OneTouch Auto-Alignment | installs in about 30 seconds |
| Tempered Glass Protection | maintains display clarity and touch sensitivity |
| Camera Lens Protectors | extends protection to the rear cameras |
Pros & Cons
| Pros | Cons |
|---|---|
| โ Fast installation | โ Four-piece bundle may be more than some users need |
| โ Includes camera lens protectors | โ Premium installation system slightly increases cost |
| โ Clear responsive display |
UNBREAKcable 3-Pack Screen Protector for iPhone 15
Best For: Best Heavy-Duty Protection
UNBREAKCABLE
UNBREAKcable 3-Pack Screen Protector for iPhone 15, Double Shatterproof Tempered Glass [Easy Installation Frame] [99.99% HD Clear] [9H Hardness] [Full Coverage] [Case Friendly] for Apple 15 6.1 inch
UNBREAKcable is designed for users who prioritize durability, reinforced construction, and impact resistance. Its double shatterproof tempered glass and installation frame provide dependable everyday protection for demanding use.
Who Should Buy It
Best for users who frequently drop their phones or work in environments where extra durability is important. It's also suitable for buyers wanting a stronger protective design.
Why We Pick It
It earned the heavy-duty recommendation because the guide highlights its reinforced construction, full coverage, and durable tempered glass.
Features & Benefits
| Feature | Benefit |
|---|---|
| Double Shatterproof Glass | improves impact resistance |
| Easy Installation Frame | simplifies positioning |
| 99.99% HD Clarity | maintains a bright and sharp display |
Pros & Cons
| Pros | Cons |
|---|---|
| โ Strong impact protection | โ Slightly lower customer rating than other picks |
| โ Full-coverage design | โ Heavier focus on durability than premium installation features |
| โ Includes three protectors |
Product Comparison Table
| Product | Image | Amazon | Best For | Rating | Our Score | Pack | Amazon Badge | Price |
|---|---|---|---|---|---|---|---|---|
| Spigen GlasTR EZ FIT | ![]() ๐ Click image to enlarge |
View Now at Amazon |
Best Overall | 4.4 โ (9,589) | 8.8/10 | 2 Pack | Amazon’s Choice | -46% $18.99 |
| TOCOL Screen Protector | ![]() ๐ Click image to enlarge |
View Now at Amazon |
Easy Installation | 4.5 โ (17,014) | 9.0/10 | 2 Pack | Amazon’s Choice | -15% $9.97 |
| Ailun 3+3 Pack | ![]() ๐ Click image to enlarge |
View Now at Amazon |
Best Budget | 4.5 โ (438,159) | 9.0/10 | 3+3 Pack | Amazon’s Choice | $8.88 |
| amFilm OneTouch | ![]() ๐ Click image to enlarge |
View Now at Amazon |
Auto-Alignment | 4.5 โ (16,532) | 9.0/10 | 4 Pack | Amazon’s Choice | $9.99 |
| UNBREAKcable 3-Pack | ![]() ๐ Click image to enlarge |
View Now at Amazon |
Heavy-Duty Protection | 4.3 โ (7,212) | 8.6/10 | 3 Pack | โ | Limited time deal -10% $17.99 |
How We Chose the Best iPhone 15 Screen Protectors
The best iPhone 15 screen protectors should protect the display without reducing touch responsiveness or making installation difficult. Instead of choosing products based only on popularity, this guide considers the factors that matter most during everyday use, including durability, ease of installation, long-term value, customer satisfaction, and compatibility with the iPhone 15.
Every recommendation in this guide balances protection, usability, customer feedback, and overall value. Products were selected to cover different budgets and user needs rather than focusing on a single brand.
Protection Performance
The best iPhone 15 screen protector should absorb everyday impacts while resisting scratches from keys, coins, and other hard objects. Tempered glass with a 9H hardness rating remains the preferred choice because it protects the display without affecting image quality or touch accuracy.
Additionally, reinforced edges reduce the chance of cracks spreading after accidental drops. Products featuring stronger edge construction generally last longer before requiring replacement.
Installation Experience
A quality iPhone 15 screen protector should install quickly without trapping dust or bubbles. Auto-alignment frames have become one of the biggest improvements because they help position the glass correctly on the first attempt.
Meanwhile, installation kits that include cleaning wipes, microfiber cloths, dust-removal stickers, and alignment tools make the process much easier for first-time users.
Build Quality
The overall construction determines how well an iPhone 15 tempered glass screen protector survives daily use. High-quality tempered glass offers excellent transparency while maintaining responsive touch controls.
Oleophobic coatings also improve the experience by resisting fingerprints, skin oils, and smudges, allowing the display to stay cleaner between wipes.
Case Compatibility
A screen protector should work with most protective cases instead of lifting around the edges. Slightly smaller case-friendly designs help prevent peeling while maintaining nearly complete screen coverage.
If you also plan to upgrade later, understanding screen protector compatibility can help explain why different iPhone models require different dimensions.
Value for Money
The best value is not always the lowest price. Multi-pack screen protectors often reduce the cost per installation while providing spare protectors if one becomes damaged.
Bundles that include camera lens protectors, installation frames, and replacement warranties generally offer better long-term value than purchasing accessories separately.
Customer Feedback
Customer reviews reveal how an iPhone 15 screen protector performs after weeks or months of normal use. Consistent praise for clarity, durability, and easy installation usually indicates dependable quality.
Review counts also matter because thousands of positive ratings provide stronger evidence than a small number of reviews.
Expert Recommendations
Well-established accessory brands continue to appear in technology buying guides because they consistently deliver reliable quality and dependable installation systems. Products from brands such as Spigen, amFilm, TOCOL, Ailun, and UNBREAKcable have built strong reputations through consistent performance rather than marketing claims.
Choose a screen protector that includes an installation frame if this is your first installation. The alignment tool dramatically reduces the chance of crooked placement and trapped dust.
How to Choose the Best iPhone 15 Screen Protector
Choosing the best iPhone 15 screen protector depends on how you use your phone every day. Instead of focusing only on price, compare materials, installation methods, protection level, and overall compatibility with your preferred case.
Tempered Glass vs TPU vs PET
Tempered glass remains the best option for most iPhone 15 owners because it delivers excellent scratch resistance, smooth touch sensitivity, and premium clarity. TPU film provides better flexibility, while PET film is inexpensive but offers the least protection.
Therefore, tempered glass is usually the most practical choice for protecting an expensive smartphone.
Understanding 9H Hardness
The 9H hardness rating indicates strong resistance against scratches from common objects such as keys or coins. Although no screen protector is completely unbreakable, higher-quality tempered glass helps absorb impacts before they reach the display.
Keep in mind that hardness measures scratch resistance rather than drop resistance, so both characteristics should be considered together.
Full Coverage vs Case-Friendly Design
Full-coverage protectors extend closer to the display edges, creating a seamless appearance. However, case-friendly protectors leave a small gap around the perimeter so protective cases do not push the glass upward.
For most users, a case-friendly design provides the better balance between protection and everyday reliability.
Privacy vs Clear Screen Protectors
A privacy screen protector limits viewing angles to help protect sensitive information in public places. Clear tempered glass offers brighter colors and maximum display clarity.
If you frequently work in cafรฉs, airports, or public transport, a privacy model may be worthwhile. Otherwise, clear glass provides the best viewing experience. You can also compare modern privacy screen protectors to understand how the technology has improved.
Auto-Alignment Installation Kits
Modern installation frames simplify the entire process by positioning the tempered glass accurately over the display. This feature reduces installation mistakes while minimizing trapped air bubbles.
Brands such as Spigen, TOCOL, and amFilm have made auto-alignment systems one of their strongest selling points.
Camera Lens Protection
Some screen protector bundles include separate camera lens protectors. These accessories add another layer of defense against scratches without noticeably affecting photo quality when properly designed.
If you often place your phone on rough surfaces, choosing a bundle with lens protectors can provide better overall protection.
Number of Protectors Per Pack
Single-pack products work well if you rarely replace protectors. However, two-pack and three-pack options offer better long-term value because you have immediate replacements after accidental damage.
Families with multiple compatible iPhone models may benefit even more from larger packs.
Warranty and Replacement Programs
Many premium manufacturers include limited lifetime or multi-year replacement warranties. These programs can reduce future costs if a protector cracks during normal use.
Before purchasing, check exactly what the warranty covers and whether free replacements require proof of purchase or shipping fees.
Always confirm your exact iPhone model before ordering a screen protector. The iPhone 15, iPhone 15 Plus, iPhone 15 Pro, and iPhone 15 Pro Max all use different display sizes, so one protector will not fit every model.
Are iPhone 15 Screen Protectors Worth Buying?
Yes, iPhone 15 screen protectors are worth buying because replacing a tempered glass protector costs far less than repairing a damaged iPhone display. A quality protector absorbs everyday scratches and many minor impacts before they reach the Ceramic Shield screen.
Although Apple’s Ceramic Shield is stronger than previous iPhone displays, it can still develop scratches or crack after an unfortunate drop. Therefore, adding a tempered glass protector remains one of the most affordable ways to extend the life of your phone.
Protection Against Scratches
The primary purpose of an iPhone 15 screen protector is to prevent scratches from everyday objects. Keys, coins, sand, and other abrasive materials can leave permanent marks on an unprotected display.
During daily use, a tempered glass protector acts as the first line of defense while preserving the original screen underneath.
Protection Against Drops
A tempered glass screen protector cannot guarantee that your display will never crack. However, it helps absorb part of the impact energy, reducing the likelihood of direct damage during smaller drops.
Combining a quality screen protector with a protective case provides significantly better protection than using either accessory alone.
Maintaining Resale Value
Keeping the original display free from scratches helps maintain the resale value of an iPhone 15. Buyers usually pay more for devices with displays that remain in excellent condition.
If you also plan to protect the entire phone, choosing a matching case can further reduce everyday wear. Our recommendations for an iPhone case and screen protection explain why both accessories work best together.
Replace a cracked screen protector as soon as possible. Even if the phone display remains undamaged, cracks can weaken impact protection during the next drop.
How Do iPhone Screen Protectors Work?
iPhone screen protectors work by absorbing scratches and dispersing impact energy before it reaches the phone’s display. Instead of damaging the original screen, everyday wear affects the replaceable tempered glass layer.
Impact Absorption
Tempered glass is designed to distribute impact across its surface instead of concentrating force in one location. Consequently, the protector may crack while the iPhone display underneath remains intact.
Replacing a damaged protector is usually much cheaper than replacing the display itself.
Scratch Resistance
Most premium iPhone 15 tempered glass screen protectors feature a 9H hardness rating that resists scratches from common household items. Although diamonds and certain minerals can still scratch glass, everyday objects rarely cause visible damage.
Oleophobic Coatings
An oleophobic coating helps reduce fingerprints, oils, and smudges on the display. This coating also allows fingers to glide more smoothly across the glass while maintaining accurate touch response.
Over time, the coating naturally wears down, which is another reason many users eventually replace older screen protectors.
How to Install an iPhone 15 Screen Protector
Installing an iPhone 15 screen protector correctly greatly improves both appearance and durability. Fortunately, most modern protectors now include alignment frames that simplify the entire process.
Before You Begin
Wash your hands and work in a clean, dust-free environment. Use the included alcohol wipe, microfiber cloth, and dust-removal sticker to completely clean the display before opening the protector.
Step-by-Step Installation
- Turn off the iPhone.
- Clean the display thoroughly.
- Place the alignment frame on the phone.
- Remove the protective film.
- Lower the tempered glass carefully.
- Press the center of the protector.
- Allow the adhesive to spread naturally.
- Remove any remaining air bubbles.
Removing Air Bubbles
Small bubbles usually disappear within several hours as the adhesive settles. Larger bubbles often indicate trapped dust, which may require lifting the affected corner and removing the debris before reinstalling the protector.
Common Installation Mistakes
The most common mistakes include installing the protector in a dusty room, touching the adhesive surface, or failing to align the glass before lowering it. Fortunately, installation frames reduce these problems considerably.
A bathroom after a hot shower often contains less airborne dust because the moisture pulls tiny particles out of the air, making installation easier.
Common Mistakes to Avoid
A high-quality iPhone 15 screen protector performs best when installed correctly and paired with compatible accessories. Avoiding these common mistakes can extend the life of both the protector and the display.
Buying the Wrong Model
Many screen protectors look similar, but the dimensions vary between the iPhone 15, iPhone 15 Plus, iPhone 15 Pro, and iPhone 15 Pro Max. Always verify your exact model before placing an order.
Ignoring Case Compatibility
Not every tempered glass protector works with every phone case. Choosing a case-friendly protector helps prevent the edges from lifting after installation.
Reusing a Cracked Protector
A cracked screen protector should be replaced immediately. Although it may still cover the display, its ability to absorb future impacts is greatly reduced.
Poor Surface Cleaning
Dust trapped beneath tempered glass creates permanent bubbles that cannot be removed later. Taking an extra minute to clean the display thoroughly usually results in a perfect installation.
Can You Use an iPhone Without a Screen Protector?
Yes, you can use an iPhone 15 without a screen protector, but doing so increases the risk of scratches and accidental display damage. Apple’s Ceramic Shield provides impressive durability, yet it is not immune to everyday wear.
If you regularly carry your phone in a pocket or bag with other objects, adding a tempered glass protector offers inexpensive insurance against cosmetic damage.
Does an iPhone 15 Screen Protector Fit the iPhone 16e?
No, an iPhone 15 screen protector should not be assumed to fit the iPhone 16e unless the manufacturer specifically lists compatibility. Even small differences in display dimensions, bezels, camera placement, or edge curvature can prevent a proper fit.
Always check the manufacturer’s compatibility information before purchasing accessories for a different iPhone model.
Does Walmart Sell iPhone Screen Protectors?
Yes, Walmart sells iPhone 15 screen protectors from several brands, including budget-friendly tempered glass and privacy options. However, product availability varies by location and online inventory.
Amazon generally offers a wider selection of installation systems, pack sizes, and customer reviews, making it easier to compare different models before purchasing.
How Much Do iPhone 15 Screen Protectors Cost?
iPhone 15 screen protectors are available at several price points, allowing buyers to choose between budget bundles and premium installation systems.
Budget Options
Budget protectors usually cost between $5 and $10. Many include two or three tempered glass protectors, making them excellent choices for everyday users who want maximum value.
Mid-Range Picks
Mid-range models generally range from $10 to $18. These products often include better installation frames, improved coatings, and stronger glass construction.
Premium Choices
Premium screen protectors usually cost between $18 and $30. Higher prices often reflect better installation systems, reinforced edge protection, premium coatings, and longer replacement warranties.
What Is the Strongest Screen Protector for iPhone?
The strongest iPhone screen protectors use reinforced tempered glass with advanced edge protection and durable adhesive layers. While no protector is completely indestructible, premium designs withstand daily impacts better than basic glass.
Standard Tempered Glass
Standard tempered glass provides excellent protection for most users while maintaining high display clarity and responsive touch controls.
Reinforced Glass
Reinforced tempered glass improves edge strength and impact resistance. These protectors are ideal for users who frequently drop their phones or work in demanding environments.
Military-Grade Protection
Some manufacturers advertise military-grade protection based on internal testing standards. Although testing methods differ, reinforced construction and improved edge durability usually provide better real-world performance than entry-level protectors.
Clear vs Privacy Screen Protectors
Choosing between a clear screen protector and a privacy screen protector depends on how and where you use your iPhone every day.
Advantages of Clear Glass
Clear tempered glass delivers maximum brightness, natural colors, and the best viewing angles. It is the preferred option for gaming, photography, streaming, and general everyday use.
Advantages of Privacy Glass
Privacy glass limits side viewing angles, helping protect personal messages, banking information, and confidential data when using your phone in public places.
Which One Should You Buy?
Choose a clear protector if display quality is your highest priority. Choose a privacy protector if you frequently use your iPhone on public transportation, in cafรฉs, or in busy workplaces.
Caring for Your Screen Protector
Proper maintenance helps an iPhone 15 screen protector remain clear, responsive, and effective throughout its lifespan.
Cleaning Tips
Use a soft microfiber cloth to remove fingerprints and dust. Avoid harsh chemical cleaners because they can damage the oleophobic coating.
When to Replace It
Replace the protector if it develops deep scratches, large cracks, chipped edges, or reduced touch responsiveness. Waiting too long reduces its protective ability.
Extending Its Lifespan
Using a protective case, avoiding unnecessary impacts, and cleaning the surface regularly will help maximize the life of both the screen protector and the iPhone display.
Frequently Asked Questions
What’s the best iPhone 15 screen protector right now?
The best iPhone 15 screen protector for most people is the Spigen GlasTR EZ FIT. It combines excellent tempered glass protection, an easy auto-alignment installation tray, strong case compatibility, and consistently high customer satisfaction. If you’re looking for premium protection without a complicated installation process, Spigen remains one of the safest recommendations.
Do I really need a case if I use a screen protector?
Yes, a protective case is still recommended. A screen protector mainly protects the display from scratches and absorbs part of the impact during smaller drops. However, the frame, corners, and back glass remain exposed without a case, so using both accessories provides the best overall protection.
When should I replace my screen protector?
You should replace a screen protector when it develops cracks, chipped edges, deep scratches, or reduced touch sensitivity. Even if the display underneath remains undamaged, a cracked protector can no longer distribute impacts as effectively, reducing its ability to protect your iPhone during future drops.
What materials are iPhone screen protectors made from?
Most premium iPhone 15 screen protectors are made from tempered glass. Tempered glass offers excellent scratch resistance, high transparency, and a smooth touch experience. Some budget protectors use PET film, while flexible TPU protectors focus more on scratch resistance than impact protection.
How thick should an iPhone 15 screen protector be?
Most quality tempered glass protectors are approximately 0.33 mm thick. This thickness provides a good balance between durability, display clarity, and touchscreen responsiveness without making the phone feel bulky during everyday use.
Will Face ID still work with a tempered glass screen protector?
Yes, Face ID continues to work normally with a properly installed screen protector. Modern protectors are precisely cut to avoid blocking the TrueDepth camera system. As long as the protector is designed specifically for the iPhone 15, Face ID performance should remain unaffected.
Does a screen protector reduce touch sensitivity?
No, a high-quality tempered glass screen protector should not noticeably reduce touch sensitivity. Premium protectors are engineered to preserve the original responsiveness of the display while maintaining excellent clarity and smooth finger movement.
Can I reuse a screen protector after removing it?
No, reusing a tempered glass screen protector is not recommended. Once removed, the adhesive layer often collects dust and loses its original bonding strength. Installing a new protector provides a much cleaner appearance and more reliable protection.
Are expensive screen protectors worth it?
Sometimes. Premium screen protectors usually include better installation systems, stronger edge reinforcement, improved oleophobic coatings, and longer warranties. However, many mid-priced protectors offer outstanding value, making them an excellent choice for most iPhone 15 owners.
Can a screen protector prevent a cracked screen?
A screen protector can reduce the risk of display damage, but it cannot guarantee that the screen will never crack. Tempered glass absorbs part of the impact during many drops, yet severe impacts can still damage the display. Pairing a screen protector with a quality protective case provides the highest level of everyday protection.
Final Thought
The best iPhone 15 screen protector depends on your priorities, but every recommendation in this guide offers dependable protection for everyday use. Whether you value premium build quality, effortless installation, or maximum value, choosing a quality tempered glass protector is one of the smartest investments you can make to keep your iPhone 15 display looking like new.
- Best Overall: Spigen GlasTR EZ FIT Screen Protector
- Best for Easy Installation: TOCOL Screen Protector
- Best Budget & Value: Ailun Screen Protector + Camera Lens Protector (3+3 Pack)
- Best Auto-Alignment System: amFilm OneTouch Screen Protector
- Best Heavy-Duty Protection: UNBREAKcable 3-Pack Screen Protector
If you’ve decided which screen protector fits your needs, you can check the latest price and availability below.
- Spigen GlasTR EZ FIT Screen Protector
- TOCOL for iPhone 15 Screen Protector
- Ailun Screen Protector + Camera Lens Protector (3+3 Pack)
- amFilm OneTouch for iPhone 15 Screen Protector
- UNBREAKcable 3-Pack Screen Protector
For additional guidance on protecting newer iPhone models, you may also find our article on top screen protectors for newer iPhones helpful.
Authoritative reference: Apple Support