Iris is the popular software for eye protection, health and productivity.
This Iris Pro is 1 time purchase for lifelong usage. Not like Iris for PC which is subscription based. This is important. You only pay once and use Iris Pro for Android forever.
This version for Android works with Screen overlay and you can lower your screen blue light and brightness for better sleep and less eye pain.
You can also choose different Screen overlay colors if you are Chromotheraphy fan.
Leave Iris Pro in the default settings and you will notice the difference.