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It asks before it writes a single set.

Every session, before it writes a single set, the coach asks "anything bothering you today?" — and if you told it about a knee last week, it asks about the knee by name. Answer it and the whole session is built differently — and it shows you its working, in plain words, movement by movement.

• Swaps a barbell press for dumbbells when your elbow is complaining, and says so
• Changes the grip rather than dropping the movement when the grip is the problem
• Keeps the muscle in the session and takes the strain off the joint
• Tell it once — the next session already knows, without asking again

RekAi is general fitness guidance, not medical advice. It programmes around an injury you describe; it does not diagnose one. If something is painful rather than stiff, see a doctor or physiotherapist first.

While you train

Put the phone down. It counts you in.

This is the part that makes it a coach rather than a list. It takes you through the session so you are not squinting at a screen between sets — with the timer live on your Lock Screen and in the Dynamic Island, and on Android in the notification shade.

• A countdown you can hear and feel into every set, and through timed efforts — your reps are yours to count
• Rest timers that tell you the next weight before you get to it
• A demonstration of every movement, matched to the exercise by name
• Swap anything mid-session when the rack is taken — or when a movement starts to niggle
• Log the reps and weight you really did, not what you were told to do

It remembers

The next session starts where the last one finished.

Injuries, loads and history carry over. You tell it about the shoulder once; it programmes around it on Wednesday and Friday too, until you tell it the shoulder is fine. Open the app two days after leg day and it already knows — and your usual gym and session length are one tap.

• An injury you mention is stored against your profile, not just today's session
• It remembers your last session, your usual kit and how long you like to train
• Say you hate burpees once and it notes it — every note is in your profile, and you can delete any of them
• Weights come from arithmetic on what you actually lifted, never invented
• Muscles you trained hard get left alone to recover, and nothing repeats inside a week
• Train towards a goal and it lays out the weeks, then writes each session in its place
• Streaks, totals and a leaderboard if you want one — off if you don't