Skip to main content

Apple bans F.lux screen brightness app for sideloading

Apple has changed its mind about the popular screen brightness management tool F.lux. Apparently, the company claims F.lux’s developers weren’t allowed to use Xcode or the iOS standard developer kit to sideload the app.

In case you’ve never heard of it, F.lux is a program for Windows, Mac, iPhone, iPad, and Linux that controls screen brightness and color, changing it gradually throughout the day. Enter what kind of lighting you have, and the program changes your screen to match the room. The app keeps you from being blinded in the morning or late night by your device’s bright screen. According to scientists, a dimmer screen emitting less blue light is better for your eyes — especially before bed.

Recommended Videos

In part because of its health benefits and all the recent news that warns against using devices before bed, F.lux has done really well. The desktop version has more than 15 million downloads, and the sideloaded iOS version was picking up steam — until Apple banned it.

“He kept repeating the party line that we should make apps that could use Public APIs.”

The sudden change caught F.lux developers off guard since the program has been widely popular and they haven’t had any complaints since Apple opened iPhones and iPads to apps outside the App Store months ago. In June, Apple changed its stance from previous years to allow users to sideload apps with its Xcode developer tool. The makers of F.lux took advantage of the new policy.

As Re/code has it, Michael Herf, one of F.lux’s founders, said, “The last six months of ‘sideload’ press – which Apple didn’t try to stop – had convinced us that Apple would be receptive to an approach like this.” Other than a little update from Apple in September, everything appeared to be fine as far as generally allowing sideloading — until now.

Suddenly, Apple seems “to disagree,” and has put the kibosh on F.lux, informing Michael that he and his team “were not authorized to use the iOS SDK or Xcode for the purpose we did,” Michael said, adding he was told that, “we could not distribute F.lux as we did.”

When Michael asked Richard Chipman, the Apple Rep about other cases that are similar to F.lux, he was evasive. “I asked him about open source used in a similar way, and he did not answer clearly, but he kept repeating the party line that we should make apps that could use Public APIs.”

By comparison, Android doesn’t require tools to sideload apps or have such strict developer limits on APIs. Why, then, does Apple? Some have suggested it’s because Apple doesn’t like anyone messing with the look of the iPhone beyond what it explicitly allows or that the limitations are intended to keep iOS secure.

Others suggest that Apple wants to take over F.lux’s game. The company cites research claiming the changes F.lux makes to your screen lighting are better for your health, and Apple is stepping further into the health tech arena. If Apple were including its own F.lux-like option in an upcoming iOS update — or as Erica Joy tweeted, a Night Mode — it wouldn’t want any competition. That way, Apple would no doubt boast about its revolutionary new screen tech, and thus removing F.lux from the picture.

Of course this is all speculation, at the moment. So far, Apple hasn’t commented on the situation.

Aliya Barnwell
Former Digital Trends Contributor
Aliya Tyus-Barnwell is a writer, cyclist and gamer with an interest in technology. Also a fantasy fan, she's had fiction…
TikTok returns to Apple, Google app stores in U.S.
TikTok logo on an iPhone.

The TikTok saga continues. Apple reinstated the popular app to the App Store on Thursday evening, and a short while later Google followed suit and put it back on the Play Store. The move came after Attorney General Pam Bondi reportedly sent a letter to the tech giants assuring them that they will not face any penalties in relation to a law that banned the app in the U.S. last month.

Both Apple and Google removed TikTok from their respective U.S. app stores on January 18, the day before the law banning the app went into effect. Then, on January 20, newly elected President Trump signed an executive order granting TikTok a 75-day reprieve from the ban to give his administration “an opportunity to determine the appropriate course forward.”

Read more
A native Android Apple TV app is now in the Google Play store
The Apple TV app on a Samsung Android phone.

It's been five years since the Apple TV app was launched, and we're now getting a version for Android devices -- built from the ground up for native Android integration -- in the Google Play store that will have the same Apple TV+ functionality as the Apple ecosystem version. The new app means users with Android OS 10 or later will finally have the ability to sign up for Apple TV+ on their Android-based phones and tablets to watch shows and movies like Severance, Silo, Killers of the Flower Moon, and CODA. There will be no difference in pricing on Android compared to Apple.

This should enable seamless interactivity across platforms for features such as Continue Watching -- which keeps track of where you are in a show or movie and allows you to pick up from that spot when you return, regardless of the device you watch on. Customer's Watchlist will be kept up to date across devices as well, and since purchases are linked to your Apple account, all the content you own will be accessible on any device with the new updated app. One thing missing at launch, though, will be the ability to cast Apple TV content from your Android device.

Read more
Apple Sports App adds NASCAR coverage ahead of 2025 season
The Apple Sports app on iPhone shows NASCAR coverage.

—As the Daytona 500 approaches this weekend, Apple has added NASCAR coverage to the Apple Sports app that launched last year. Since launching in February 2024, the Apple Sports app has gradually added coverage for various sports leagues. However, it started to gain traction last fall when the college football season began.

This free app allows iPhone users to follow their favorite teams, leagues, and tournaments, providing real-time scores, statistics, schedules, and news. It also features "Live Activities," enabling users to view live scores and updates directly on their iPhone Lock Screen, Dynamic Island, and Apple Watch.

Read more