Suzztain
Pick a movement, start the timer, and count reps or held seconds. Every set you save builds a history, a set of personal records, and a body map that shades each muscle by how much work it has taken and how long it has had to recover. None of it leaves the phone — the app does not hold the internet permission at all.
What it does
One exercise at a time
Choose the movement, start the timer, count reps or held seconds. There is no programme to build before you can train.
A history that adds up
Each saved set turns into personal records and a recent-load figure, worked out on the device from what you actually logged.
A body map from your own log
See which muscles you have worked lately and which have had time to recover. It is an estimate from your records, not a reading of your body.
Offline by construction
Suzztain does not declare the Android internet permission, so the system will not let it open a connection even if it tried to.