Rainbrow Is a New iPhone X Game You Control With Your Eyebrows

Washington University computer science graduate Nathan Gitter has released Rainbrow, an eyebrow-controlled arcade game for iPhone X.

The simple game requires players to use their eyebrows to move an emoji face up and down the screen to collect stars, worth one point each, while avoiding other emoji obstacles such as cars, basketballs, and ducks.

rainbrow
Simply raise your eyebrows to move the emoji up, frown to move the emoji down, or make a neutral expression and the emoji stays still. Note that if you raise your eyebrows, and keep them raised, the emoji will continue to move in an upwards direction, and vice verse when maintaining a frowning expression.

While there are no levels, the game gets increasingly difficult as more obstacles appear. The goal is simply to get the highest score possible, but players can only compete against themselves right now. Gitter told us that he plans to integrate Apple's Game Center for multiplayer competition in a future update.


Rainbrow is a novel concept since it's an early example of a game using ARKit, an iOS 11 framework that can detect the position, topology, and expression of a user's face in real time using the iPhone X's new TrueDepth camera system.

Gitter told us he believes there is a lot of future potential for face-based apps, especially for those that improve accessibility. He pointed us to another face-controlled game that was released earlier this week, Nose Zone, which tasks players with destroying targets by pointing at them with their nose.

Upon first opening Rainbrow, a prompt asks for permission to access the front-facing camera. As with any app, this permission can be toggled on or off at a later time in the Settings app under Privacy > Camera.

rainbrow 2
Rainbrow's privacy policy, which all apps with face tracking are required to have, says that depth data is collected only for gameplay purposes, only stored on the device locally, and only for the duration of a game session. The policy adds that depth data is never stored remotely, given to third parties, or used for any non-gameplay purposes.

Rainbrow is free to download on the App Store for iPhone X. Gitter told us he may add an optional in-app purchase to unlock new emoji characters in the future, but he does not plan on implementing ads into the game.

Gitter works at mobile app studio SwiftKick Mobile in Austin, Texas. His personal website says he's available for iOS design and development work.

Updated: Lucky Kat Studios reached out to us after we published this article to alert us about its upcoming game Wacky Face, now available for pre-order on the App Store ahead of its December 20 launch.


Wacky Face requires players to wink or open their mouth to attack enemies. Like Rainbrow and Nose Zone, the arcade game uses both ARKit and the iPhone X's new TrueDepth camera system to capture facial depth data.

Related Forum: iPhone

Top Rated Comments

Bryan Bowler Avatar
84 months ago
Craig Federighi is going to love this game.
Score: 34 Votes (Like | Disagree)
UL2RA Avatar
84 months ago
This is so dumb. Get back to work Apple.
Apple needs to get back to work because a guy that has absolutely nothing to do with Apple made a game?
Score: 14 Votes (Like | Disagree)
DakotaGuy Avatar
84 months ago
The game looks colorful except they messed up and left a chunk of black in the top red bar.
Score: 11 Votes (Like | Disagree)
iReality85 Avatar
84 months ago
“Is that guy having hemifacial spasms?”

“No, he’s just playing an iOS game.”
Score: 10 Votes (Like | Disagree)
shayneox Avatar
84 months ago
Emilia Clarke will smoke everyone on this game
Score: 8 Votes (Like | Disagree)
OldSchoolMacGuy Avatar
84 months ago
OMG IT'S A PRIVACY NIGHTMARE! EVERYONE PANIC!!!!!
Score: 7 Votes (Like | Disagree)

Popular Stories

iOS 17

iOS 17.5 Bug May Also Resurface Deleted Photos on Wiped, Sold Devices [Updated]

Friday May 17, 2024 12:24 pm PDT by
A bug in iOS 17.5 is apparently causing photos that have been deleted to reappear, and the issue seems to impact even iPhones and iPads that have been erased and sold off to other people. A Reddit user wiped an iPad following Apple's guidelines in September of 2023 before selling it off to a friend. That friend updated the iPad to iPadOS 17.5 this week, and began seeing the Reddit user's old ...
iphone se 4 modified flag edges

When to Expect the Next iPhone SE to Launch

Friday May 17, 2024 2:03 pm PDT by
It has been over two years since Apple released the third-generation iPhone SE, and rumors continue to surface about a new model. The latest word comes from The Information, which today reported that Apple plans to release a new iPhone SE with a design similar to the standard iPhone 14 in the spring of 2025. If this rumor is accurate, the iPhone SE would finally gain Face ID and a notch...
oled m4 ipad pro grainy display reports

OLED iPad Pro Users Report 'Grainy' Displays, But It May Not Be a Defect

Friday May 17, 2024 5:57 am PDT by
Some new M4 iPad Pro models are exhibiting a visible static grain pattern across the OLED display, according to several user reports on Reddit (1, 2, 3) and the MacRumors Forums. Image credit: MacRumors user bk215 Users who see the grain generally report that it is most noticeable in dark environments with the display set at a low to medium brightness while viewing content with gray or muted...
iOS 17

Troubling iOS 17.5 Bug Reportedly Resurfacing Old Deleted Photos

Wednesday May 15, 2024 5:29 am PDT by
There are concerning reports on Reddit that Apple's latest iOS 17.5 update has introduced a bug that causes old photos that were deleted – in some cases years ago – to reappear in users' photo libraries. After updating their iPhone, one user said they were shocked to find old NSFW photos that they deleted in 2021 suddenly showing up in photos marked as recently uploaded to iCloud. Other...
Delta Hands On Feature

iPhone Emulators on the App Store: Game Boy, N64, PS1, PSP, and More

Thursday May 16, 2024 12:45 pm PDT by
In April, Apple updated its guidelines to allow retro game emulators on the App Store, and several popular emulators have already been released. The emulators released so far allow iPhone users to play games released for older consoles from Nintendo, Sony, SEGA, Atari, and others. A list of some popular emulators available on the App Store so far follows. Released Delta Delta is...
iphone 15 pro max vs iphone 16 pro max

iPhone 16 Pro Max Looks This Much Bigger Beside iPhone 15 Pro Max

Thursday May 16, 2024 4:51 am PDT by
This year's upcoming iPhone 16 Pro Max is expected to get a boost in overall size from 6.7-inches to 6.9-inches, and a new image gives us a good idea of how the current iPhone 15 Pro Max compares to what could be Apple's largest ever iPhone. The image above, posted on X by ZONEofTECH, shows a dummy model representing the ‌iPhone 16 Pro‌ Max alongside an actual iPhone 15 Pro Max. Dummy...