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.


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'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.

Top Rated Comments

(View all)
Avatar
32 months ago
Craig Federighi is going to love this game.
Score: 34 Votes (Like | Disagree)
Avatar
32 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)
Avatar
32 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)
Avatar
32 months ago
“Is that guy having hemifacial spasms?”

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

Top Stories

Apple Doubles the Price of RAM Upgrade on Entry-Level 13-Inch MacBook Pro

Saturday May 30, 2020 4:00 pm PDT by
Apple today doubled the price for upgrading the RAM on the entry-level 13-inch MacBook Pro, with customers in the United States now being charged $200 to move from 8GB to 16GB compared to the previous $100 upgrade price. Similar increases are seen in other countries, such as moving from €125 to €250 in Germany and from £100 to £200 in the United Kingdom. Current pricing on RAM upgrade for ...

8 Mac Tips and Tricks You Might Not Know

Friday May 29, 2020 12:36 pm PDT by
There are tons of hidden features and shortcuts for Macs that Apple has built into macOS over the years, ranging from shortcuts to keyboard commands to other little hacks to make Mac usage just a bit simpler. In our latest YouTube video, we highlighted several of these tips and tricks, and some of them might just be new to you. Subscribe to the MacRumors YouTube channel for more videos. Tr...

Apple Begins Selling Refurbished iPhone XR Models

Thursday May 28, 2020 9:50 pm PDT by
Apple today began selling certified refurbished iPhone XR models in select colors and capacities for the first time in the United States. Refurbished iPhone XR models are priced at a roughly 16 percent discount compared to current pricing on brand-new units, knocking $100–120 off of the regular price. In addition to the 64GB and 128GB capacities matching current brand-new iPhone XR models, ...

Top Stories: macOS 10.15.5, New Powerbeats Pro Colors, iPhone 12 and 13 Rumors, and More

Saturday May 30, 2020 6:00 am PDT by
This week saw an interesting mix of news and rumors on the Apple front, led by the release of macOS 10.15.5, which brings a new battery health feature to newer Mac notebooks, while we also saw the official announcement of new colors for the Powerbeats Pro earphones. On the rumor front, we heard a few tidbits about not just this year's iPhone 12 but also next year's iPhone, while we saw...

Powerbeats Pro Debut in Four New Colors: Spring Yellow, Cloud Pink, Lava Red, and Glacier Blue

Friday May 29, 2020 10:00 am PDT by
Following a couple of leaks in recent weeks, Beats today is officially announcing four new colors for its Powerbeats Pro wireless earphones: Spring Yellow, Cloud Pink, Lava Red, and Glacier Blue. The new earphones will go on sale June 9 and sell for the same $249.95 price as the existing color options. Aside from the colors, the new Powerbeats Pro models are otherwise identical to the...

Apple Releases macOS Catalina 10.15.5 With Battery Health Management Features, Fix for Finder Freezing

Tuesday May 26, 2020 1:59 pm PDT by
Apple today released macOS Catalina 10.15.5, the fifth update to the macOS Catalina operating system that was released in October 2019. macOS Catalina 10.15.5 comes two months after the launch of macOS Catalina 10.15.4, which introduced Screen Time Communication Limits. macOS Catalina 10.15.5 is a free update that can be downloaded from the Mac App Store using the Update feature in the...

Apple Making It Harder to Avoid Nagging macOS Update Notifications

Thursday May 28, 2020 8:13 am PDT by
With the release of macOS Catalina 10.15.5 and related security updates for macOS Mojave and High Sierra earlier this week, Apple is making it more difficult for users to ignore available software updates and remain on their current operating system versions. Included in the release notes for macOS Catalina 10.15.5 is the following:- Major new releases of macOS are no longer hidden when...

Leaker Shares Details on 'iPhone 13' Camera [Updated]

Wednesday May 27, 2020 4:27 pm PDT by
The next-generation iPhone 12 lineup coming in fall 2020 isn't out yet, but Fudge (@choco_bit), a leaker who sometimes shares information on upcoming Apple devices, today offered up details on what Apple has in store for the 2021 iPhone 13's camera setup. A simple design drawing depicts a device with a four camera array, which Fudge claims will have the following features: 64-megapixel...

More Photos and Video of Apple's Redesigned Leather Loop Watch Band Surface

Thursday May 28, 2020 10:50 am PDT by
Images of a new version of the Leather Loop that Apple appears to have in development surfaced yesterday, and today, Vietnamese site Tinhte.vn has shared additional photos and videos that give us a clearer picture of what to expect from the new band. The bands come in colors that include red, hot pink, blue, black, and brown, with some of the bands featuring different colored accents at the...

Tile Writes to EU Accusing Apple of Abuse of Power

Friday May 29, 2020 4:29 am PDT by
Bluetooth accessory maker Tile has written to the European Union accusing Apple of abuse of power and of illegally favoring its own products. According to a report by Financial Times, in a letter sent on Tuesday to the European Commissioner for Competition, the accessory maker said that Apple is making it harder for users to use Tile products on iPhone because it has its own rival Find My...