Developers Behind F.lux Call on Apple to Allow F.lux App for iOS Devices

With iOS 9.3, Apple introduced Night Shift, a feature that is designed to cut down on nighttime blue light exposure from iOS devices to encourage better sleep. Its similarity to the popular f.lux app for Mac did not go unnoticed, especially since Apple put a stop to an f.lux for iOS app just two months before Night Shift debuted.

The developers behind f.lux have now published an official response to Apple's Night Shift feature, calling Apple's move to address nighttime exposure to blue light a "big commitment and an important first step." They ask Apple to take its support a step further by implementing the tools that would allow for an App Store version of the f.lux app.

nightshift

We're proud that we are the original innovators and leaders in this area. In our continued work over the last seven years, we have learned how complicated people actually are. The next phase of f.lux is something we cannot wait to ship to the world. [...]

Today we call on Apple to allow us to release f.lux on iOS, to open up access to the features announced this week, and to support our goal of furthering research in sleep and chronobiology.

F.lux for the Mac has been available for years and is popular in the Mac community with users who want to avoid blue light at night. Research has suggested that bright light exposure (especially the blue wavelength) at night can interrupt the circadian rhythm, causing sleep problems and other harmful effects on the immune system. While there's been a Mac solution to blue light for some time, no such tool has been available on a non-jailbroken iOS device.

fluxformac

F.lux for Mac

In November, the developers behind f.lux attempted to bring an official iOS version of f.lux to the iPhone and the iPad using an app side-loaded onto iOS devices via Xcode, but Apple quickly put a stop to it and told f.lux that asking customers to side-load apps onto their iOS devices violates the Developer Program Agreement.

F.lux's developers are not able to create an official App Store version of f.lux for iOS devices without Apple's help because the APIs to control display temperature are not provided by Apple. The version of f.lux that was briefly available used private APIs that would prevent it from being approved for release in the App Store.

Night Shift mode is currently available to developers and public beta testers who are running iOS 9.3. The feature will see a public release this spring when iOS 9 launches.

Popular Stories

iOS 26

iOS 26.4 and iOS 27 Features Revealed in New Leak

Friday December 12, 2025 10:56 am PST by
Macworld's Filipe Espósito today revealed a handful of features that Apple is allegedly planning for iOS 26.4, iOS 27, and even iOS 28. The report said the features are referenced within the code for a leaked internal build of iOS 26 that is not meant to be seen by the public. However, it appears that Espósito and/or his sources managed to gain access to it, providing us with a sneak peek...
iOS 26

iOS 26.2 Coming Soon With These 8 New Features on Your iPhone

Thursday December 11, 2025 8:49 am PST by
Apple seeded the second iOS 26.2 Release Candidate to developers earlier this week, meaning the update will be released to the general public very soon. Apple confirmed iOS 26.2 would be released in December, but it did not provide a specific date. We expect the update to be released by early next week. iOS 26.2 includes a handful of new features and changes on the iPhone, such as a new...
iOS 26

Apple Releases iOS 26.2 With Alarms for Reminders, Lock Screen Changes, Enhanced Safety Alerts and More

Friday December 12, 2025 10:10 am PST by
Apple today released iOS 26.2, the second major update to the iOS 26 operating system that came out in September, iOS 26.2 comes a little over a month after iOS 26.1 launched. ‌iOS 26‌.2 is compatible with the ‌iPhone‌ 11 series and later, as well as the second-generation ‌iPhone‌ SE. The new software can be downloaded on eligible iPhones over-the-air by going to Settings >...
AirPods Pro Firmware Feature

Apple Releases New Firmware for AirPods Pro 2 and AirPods Pro 3

Thursday December 11, 2025 11:28 am PST by
Apple today released new firmware designed for the AirPods Pro 3 and the prior-generation AirPods Pro 2. The AirPods Pro 3 firmware is 8B30, up from 8B25, while the AirPods Pro 2 firmware is 8B28, up from 8B21. There's no word on what's include in the updated firmware, but the AirPods Pro 2 and AirPods Pro 3 are getting expanded support for Live Translation in the European Union in iOS...
macOS Tahoe 26 Thumb

Apple Releases macOS Tahoe 26.2 With Edge Light

Friday December 12, 2025 10:08 am PST by
Apple today released macOS Tahoe 26.2, the second major update to the macOS Tahoe operating system that came out in September. macOS Tahoe 26.2 comes five weeks after Apple released macOS Tahoe 26.1. Mac users can download the macOS Tahoe update by using the Software Update section of System Settings. macOS Tahoe 26.2 includes Edge Light, a feature that illuminates your face with soft...
AirTag 2 Mock Feature

Apple AirTag 2: Four New Features Found in iOS 26 Code

Thursday December 11, 2025 10:31 am PST by
The AirTag 2 will include a handful of new features that will improve tracking capabilities, according to a new report from Macworld. The site says that it was able to access an internal build of iOS 26, which includes references to multiple unreleased products. Here's what's supposedly coming: An improved pairing process, though no details were provided. AirTag pairing is already...
ipados 26 1 slide over

Apple Releases iPadOS 26.2 With Multitasking Improvements

Friday December 12, 2025 10:09 am PST by
Apple today released iPadOS 26.2, the second major update to the iPadOS 26 operating system released in September. iPadOS 26.2 comes a month after iPadOS 26.1. The new software can be downloaded on eligible iPads over-the-air by going to Settings > General > Software Update. iPadOS 26.2 continues with the multitasking improvements that were added with iPadOS 26.1. You can now drag and...
bug security vulnerability issue fix larry

Update Now: iOS 26.2 Fixes 20+ Security Vulnerabilities

Friday December 12, 2025 11:11 am PST by
Apple today released iOS 26.2, iPadOS 26.2, and macOS 26.2, all of which introduce new features, bug fixes, and security improvements. Apple says that the updates address over 20 vulnerabilities, including two bugs that are known to have been actively exploited. There are a pair of WebKit vulnerabilities that could allow maliciously crafted web content to execute code or cause memory...

Top Rated Comments

magicschoolbus Avatar
130 months ago
Apple looks like a bunch of dicks not allowing this in the app store.
Score: 79 Votes (Like | Disagree)
Asarien Avatar
130 months ago
I rather this feature be directly integrated within the OS over a separate, third party app, anyway.
Score: 62 Votes (Like | Disagree)
procrastinasn Avatar
130 months ago
Apple looks like a bunch of dicks not allowing this in the app store.
It's a system-wide thing, and because of that, Apple wants control of it. I don't see what's wrong with that?
Score: 41 Votes (Like | Disagree)
rcappo Avatar
130 months ago
I like it better when integrated into the OS, but Apple should have paid f.lux some money or bought out their company.

This is getting close to the situation where the big car companies implemented the windshield wiper design that a small time inventor created without compensating him.
Score: 29 Votes (Like | Disagree)
nfl46 Avatar
130 months ago
Lol! Apple has been taking jailbreak tweaks and incorporating them in iOS for years. This is nothing new.
Score: 25 Votes (Like | Disagree)
mokes Avatar
130 months ago
Apple needs to just buy them out and call it a day, they have the money.
That warchest money is for questionable brand asset acquisitions like Beats, instead of being used with a modicum of integrity to pay original creators for intellectual property, that's later to be implemented as a 'revolutionary innovative feature'.
Score: 22 Votes (Like | Disagree)