f.lux for Mobile
Free
f.lux for Mobile extends the same blue light filtering technology to iOS devices, helping reduce eye strain and improve sleep quality for mobile users.

Our take
Bringing f.lux's comfort to your mobile device.
Alright, so let’s talk about f.lux for Mobile. This app is supposed to help your eyes by adjusting your screen's color temperature based on the time of day. Sounds cool, right? It dims and shifts your screen to warmer tones at night, which is supposed to help you sleep better. But honestly, I’m a bit skeptical about whether it makes a huge difference. I mean, who can really tell if it’s the app or just you being dog-tired that helps you conk out faster? Still, if you’re looking for something to ease the strain on your eyes, it might be worth a shot.
Now, using f.lux is pretty straightforward. You install it, set your location, and let it do its thing. During the day, your screen stays bright and crisp, and at night, it eases into a more mellow tone. **The transition is smooth, which is a nice touch,** so you're not getting jolted by sudden changes. But here’s the catch: if you’re someone who needs accurate color for stuff like photo editing, the nighttime tones can be a bit of a nuisance. You’ll have to keep toggling it off, which kind of defeats the purpose if you ask me.
Another thing to keep in mind is battery life. f.lux running in the background does nibble away at your battery a bit faster. It’s not a massive drain, but it’s noticeable if you’re already struggling to make it through the day on one charge. So, if you’re like me and always on the go, you might find yourself hunting for a charger more often. You’ve got to weigh whether the slightly better sleep is worth that extra plug-in time.
Compatibility can also be a bit of a headache. f.lux isn’t available for all mobile devices, which is a bummer. If you’re an Android user, you might need to root your phone to get the full experience, which isn’t everyone’s cup of tea. The iOS version is more limited, thanks to Apple’s restrictions. It’s like Apple wants you to stick with their Night Shift feature, which does a similar thing but doesn’t offer the same level of customization. So, you’re kind of stuck with whatever your device supports.
In the end, f.lux for Mobile is a neat idea, especially if you’re all about optimizing your screen time for better sleep. But, it’s not without its quirks. If you’re already using something like Night Shift or another blue light filter, you might not notice a huge difference. But for those who are on their screens late into the night and looking for some relief, it’s certainly worth trying out. Just be prepared for some trade-offs in terms of battery life and color accuracy.