Training

The workout tracker that remembers last time.

Made in the UK by Bolt Business Limited, company number 16864050 · No ads, no trackers

Health AI is a workout tracker and gym log for iPhone. Every exercise shows what you lifted last time, a rest timer counts down on your Lock Screen, and your best lifts are kept for you. The coach reads your last 30 days of training, food and runs.

3 days free
Then £9.99 a month
Cancel any time in your Apple account

A push day under way: bench press sets at 72.5 kg ticked off beside last time's, a new best, and a rest timer at 0:52.

Logging

How do you log a workout?

Start a routine you built, or an empty workout, and add exercises from a library of 300, all with written steps, most with a drawing. Every exercise shows what you did last time beside each set: tick a set to log the numbers shown, or type over them.

Weights, bodyweight, holds and warm-ups: how each is logged

How each set is logged
Kind of set	Logged as
Weight and reps	Kilograms or pounds.
Bodyweight	Reps, for pull-ups and press-ups.
Holds	Seconds, timed as you hold.
Warm-ups	Kept out of your volume, bests and set counts.

Sets save to your phone as you go, no signal needed.

The rest timer on your Lock Screen, and on your wrist

The rest timer's settings
Under Rest in Train → Settings	What it does
Default rest	90 seconds, or 15 seconds to 5 minutes.
Start rest after each set	Starts the timer when you tick a set. Off by default.
Alert when the screen is off	A notification when a rest ends, with a tap on a paired Apple Watch.

The countdown and your next set stay on the Lock Screen, with +15 and Skip; with a Dynamic Island, the countdown shows there in other apps.

A workout on the Lock Screen: resting, 0:52 left, next set 4 of 4 at 72.5 kg × 8, with +15 and skip buttons. — **The Lock Screen**

A workout in the watch's Smart Stack: rest, 0:52, with a skip button. — **Apple Watch**With iOS 18 and watchOS 11.

3 days free
Then £9.99 a month
Cancel any time in your Apple account

Cancel at least 24 hours before the three days are up and you pay nothing.

Personal bests

Which personal bests does it keep?

For every weighted lift: your heaviest weight, estimated one-rep max, and best set and session by volume. For bodyweight it keeps your most reps; for holds, your longest. A NEW BEST badge appears mid-workout the moment you beat your heaviest.

The coach reads your last 30 days of workouts

Each exercise's set count and top set, and saved routines.

Ask for a routine and it drafts three to eight exercises to check and save; it never logs anything.

Also see the running app, the protein tracker, the AI coach, or everything Health AI does.

Workout log app, notebook or spreadsheet: what each does between sets

Three ways to keep a workout log
What you need	Health AI	A notebook	A spreadsheet
Last time's sets	Beside every set	Turn back the pages	Scroll up
Rest timer	On the Lock Screen	A separate timer	A separate timer
Personal bests	Kept for you	By hand	Formulas you write
Food and runs	In the same app	Elsewhere	Another sheet
Cost	£9.99 a month, after 3 days free	A notebook and a pen	Free

A notebook never needs charging.

One session, set by set

A bench press session, as the app records it.

Follow one bench press session to a new best

The app is new, so here is one session instead of lifters' stories.

Starting
Start your push routine: bench press shows last time's four sets of 72.5 kg × 8 in grey.
Each set
Tick each set. With Start rest after each set on, a 90-second rest begins and the Lock Screen shows your next set.
The last set
75 kg for 8 is heavier than ever: NEW BEST appears.
Finish
Bench press's page shows 75 kg as your heaviest and 95 kg as your estimated one-rep max: 75 × (1 + 8 ÷ 30), Epley's formula.

The bench press page: a drawing, the muscles worked, and bests of 75 kg heaviest and 95 kg estimated one-rep max. — An exercise's page. Screens from the app, with sample data.

Questions

Workout tracker questions, answered.

Is there a free workout tracker app?

Several are free with limits. Health AI is three days free, then £9.99 a month, with no adverts. If you stop paying, logging workouts keeps working.

How do I cancel the free trial?

In your iPhone's Settings → your name → Subscriptions. Cancel at least 24 hours before the three days end and you pay nothing.

Does it work on Apple Watch?

Not for logging: sets go in on your iPhone. With iOS 18 and watchOS 11, its card shows in the Smart Stack; switch on Alert when the screen is off and a rest ending taps your wrist.

How often should you strength train?

The NHS advises strengthening activities that work all the major muscles on at least 2 days a week, and lifting weights counts. Health AI's weekly goal starts at 3 workouts.

Can I get my workouts out?

Yes: every workout as one JSON file, from Train → Settings → Export workout data. Finished ones can also go to Apple Health.

On the App Store in the UK, for iPhone with iOS 17 or later. Screens show sample data.

Every set, remembered.

Training, runs and food in one app, with a coach that reads your last 30 days of all three.

3 days free
Then £9.99 a month
Cancel any time in your Apple account

Cancel at least 24 hours before the three days are up and you pay nothing.