proof

The weightlifting log for iPhone and Apple Watch

Know what to lift today.

Proof remembers every set, shows what's improving, and gives you the number to beat next time. Coming from Strong or Hevy? Bring your history.

Download on theApp Store

Free. No account.
Your data stays on your phone.

Proof Today: 45 sets this week, 12 weeks in a row, and Next up Pull with a Start button

Proof on Apple Watch: Barbell Row, 185 lbs by 8 reps, and Strike set

See it work

A minute with Proof.

Today, Progress, Body and History, recorded on an iPhone.

Your week at a glance. Swipe back through any week.

Every set, remembered. Always in sight.

Widgets show your next workout and your week at a glance. Log the next set from the Lock Screen, without opening the app.

Up next widget: Legs and Abs, 12 lifts, 39 sets, Leg Press 340 by 12, Start workout

This week widget: 3 of 5 days, 47 sets, 2 more planned, 18 weeks in a row

Sets widget: 47 sets, 2 of 13 muscles at 10 sets, 7 more planned

The logger

Log a set in one tap.

Your whole workout and the number pad on one screen. Last time's numbers are already filled in: tap, lift, done.

Every lift

Know what to aim for next time.

Your best, your last, and the next number to hit. Proof compares every set with last time, so a better session never hides behind a plain first set.

Your goal

Set up for your goal.

Build muscle, get stronger, or stay in shape. Proof sets your rep ranges and weekly targets to match.

Progress for build muscle: muscles at 10 sets a week and a ring for each — Build muscle: every muscle to 10 sets.

Progress for get stronger: lifts going up, with a bar for each — Get stronger: which lifts are going up.

Progress for stay in shape: every area covered, week by week — Stay in shape: every area, every week.

Body

See which muscles you've worked.

Every set fills in the map. Tap a muscle for its numbers, or compare with the month before.

Body map: every muscle shaded by its sets — Your whole body.

Chest zoomed in with its sets, volume and last trained — Tap a muscle.

Compare: the last 4 weeks against the 4 before — Compare to the month before.

Beat last time.

That's the whole idea.

Records

Know when you beat your best.

A set past your best drops a record bar from the top, and your workout keeps going. Finish, and Proof sums up what you set.

New record bar at the top of the logger: Deadlift 335 by 3, plus 8 lbs — Mid-workout.

End of workout card: new record, plus 10 lbs on Deadlift, and Show your proof — When you finish.

Lock Screen and Apple Watch

Log sets without opening the app.

Your rest timer lives on the Lock Screen and in the Dynamic Island. Log the next set from there, or leave your phone in your bag and log it on your wrist.

Leg PressRest 2:06

−350 lbs+ −12 reps+

✓ Strike set

History

Learn how you train best.

Proof spots the patterns in your log, like the day you set the most records, and keeps every workout one search away.

History patterns: your weekly rhythm and plain reads like Wednesday is your anchor — Your patterns.

Every session, searchable, with records marked — Every workout, saved.

Show up. Proof keeps count.

Three days a week or six, your plan fits your gym.

Setup

A routine that fits your gym and your week.

Tell Proof your goal, your equipment and your days. Pick a plan, or have your AI write one.

Setup: days a week, minutes each, and how you like to split it — Your days and time.

Plans for your home gym, best fit first — Plans for your equipment.

Ask your AI: ChatGPT, Claude or Perplexity, with your answers filled in — Or ask your AI.

Switching apps

Coming from Strong or Hevy?

Export a CSV and import it into Proof. Your workouts, records and patterns are there on day one.

Every workout and every set
Warm-ups kept out of your records
Undo in one tap

Proof welcome: Log your lifts, beat last time, and Coming from Strong or Hevy? Import

Know what to lift today.

Free to download. No account, no ads, no feed. Your data stays on your phone.

Download on theApp Store Built by one person. Here's why ›