There is no app to download and no icon sitting on your home screen. What reaches you is a single quiet reminder, once a day, and even that is written to reveal nothing. It knows which day you are on. It never says what the day is for.
Anyone who glances at your phone sees a plain message and nothing more. There is no progress counter, no streak, no label that explains itself. The reminder does its work and keeps your reason your own.
The program does not know your name unless you choose to give it. It does not connect to anything else on your device, and it never asks why you would rather keep this to yourself.
Some things are easier to work on quietly.