Chalklog: Private Workout Log

Chalklog is a workout log for people who lift. It lives on your phone and your wrist, and nowhere else.

Start a workout, add exercises, type weight and reps, check the set. The rest timer starts itself and ends with a notification on the phone or a tap on the wrist. Finish, and the workout is in your history with your records marked. Save it as a routine and start from it next time.

What is in it:

- Fast logging: set rows with your last numbers beside them, warm-up, drop and failure set types, supersets, RPE if you want it, notes per exercise, a plate calculator and a warm-up percentage table.
- Apple Watch app: a remote for the workout on your phone. Start a routine, log a set in one tap or adjust it with the crown, run the rest timer, finish. When a rest ends and your iPhone is locked, its notification taps your wrist. The phone can stay in the bag as long as it is nearby.
- Routines without limits: folders, reorder, duplicate, archive. Finish a workout and write today's sets back into the routine, or save any workout as a new routine.
- An exercise library of more than 870 movements with muscle and equipment filters, plus unlimited custom exercises. Hide what you never do.
- History that shows its work: calendar, weekly chart, every workout editable after the fact, repeat any past workout in a tap.
- Per-exercise charts and records: estimated one-rep max, heaviest set, volume, reps over time, best reps at every weight.
- Body weight and tape measurements with their own charts.
- CSV export of everything, and CSV import so the history you kept elsewhere comes with you.
- Apple Health writing, off by default: finished workouts and body weight, if you turn it on. Chalklog reads nothing from Health.
- Siri Shortcuts to start a workout, a routine or the rest timer.

What stays private:

- There is no account and no server. We cannot see your log, sell it or hand it over, because it never reaches us.
- The database is encrypted and kept out of iCloud and computer backups. Lock the app with Face ID or a PIN.
- No feed, no followers, no analytics, no ads. The only notification is the rest timer, from your phone. Put the phone in Airplane Mode and keep logging.

What Chalklog does not do: it does not generate workouts, suggest weights or tell you what to lift. It shows what you did; what you do next is yours. Estimated one-rep max is an estimate from your logged sets, not a test. Lifting carries risk; talk to a professional about anything that concerns you.

Every feature is there from the first launch.