Cairn: Form · Out now on iPhone and Android

Turn up knowing
what you’re lifting.

A resistance-training app that builds a four-week block around your days, your equipment and your experience, then reads the sets you actually logged to decide what comes next.

Download on the App Store Get it on Google Play
See what it does

Your first month of Premium, free. A one-month introductory offer on the monthly subscription, run by the App Store or Google Play. Cancel any time.

Four cairns of stacked stones rising along a misty ridge, each topped by a clay-coloured summit stone.
The Today screen in Cairn: Form, showing week 3 of 4, the next workout Upper B with its six exercises, and this week’s completed sessions.

Blocks, not endless weeks

Training runs in four-week blocks. Each one ends with a review, and the review shapes the next block.

Evidence, and its limits

The programming rules are checked against ten evidence reviews and a 2026 synthesis of 137 systematic reviews. Where the evidence runs out, Form says so rather than inventing a rule.

Your gym, your week

Built around the days you have, the kit you can reach and the time you can give it, from a full gym to a pair of dumbbells at home.

Inside the app

The programme, the session, and what it learns.

Screens from the app. Figures shown are from a test account.

Today screen: week 3 of 4, Block 1, ten of sixteen workouts complete, with Upper B queued and a start button.

Today

One screen for the session in front of you.

Where you are in the block, what today holds, and a single button to begin. Set logging keeps your last performance on the same row, so you are never guessing what you did a fortnight ago.

  • Sets, reps, load and reps-in-reserve in a few taps
  • Previous performance visible while you train
  • Machine taken? Swap the exercise and keep going
Programme screen: an Upper / Lower block of four sessions a week over four weeks, with each week’s sessions ticked off.

Programme

A block you can see end to end.

Your split, your sessions and every exercise in them, laid out for the whole four weeks. Nothing is hidden behind a daily reveal, and you can edit the plan yourself when you want to.

  • Built from your availability, equipment and goals
  • Muscles in your programme, listed honestly
  • Edit sessions, exercises and targets by hand
Progress screen: a chart of where direct work went by muscle group for this block, and how load is moving on a chosen lift.

Progress

Where the work actually went.

Direct work by muscle, sets logged, and how load is moving lift by lift. Enough to see whether the block did what it set out to do, without a dashboard you have to decode.

  • This week, this block, all time
  • Load at your heaviest set, workout by workout
  • Every completed session still readable in full
Rowan, the in-app coach, answering a request for a 45-minute biceps and triceps session with six exercises and set targets.

Rowan

A coach that answers from your own training.

Ask why a weight went up, what a session is for, or for a one-off workout when you are away from your plan. Rowan reads your training record and explains it. It suggests; it never rewrites your programme behind your back, and it is not medical advice.

  • Plain-language reasons for what the programme is doing
  • One-off sessions you can start there and then
  • Your record stays yours: see the privacy policy

Free and Premium

Free trains you. Premium adapts to you.

No advertising, no feed, and nothing sold on. The split below is the one written into the app.

Free

The whole training product, from day one.

  • Programme setup, preview and activation
  • Every workout logged: sets, reps, load, reps in reserve
  • Exercise swaps, extras, cardio and mobility
  • Full history and basic progress
  • Training preferences and manual plans
  • Rowan basics, five questions a week

Premium

First month free

Everything in Free, plus the parts that respond to your training.

  • Weight suggestions from your first session
  • The end-of-block review, with reasons
  • An adapted next block, every block
  • Rowan with your history, programme and adaptation
  • No weekly question cap

Prices, billing periods and the introductory month are set in the App Store and Google Play, and shown in the app before you buy. Subscriptions are managed in your store account; the Terms of Use set out the rest. Cairn: Form is not a medical device and does not diagnose or treat any condition.

Out now

Start your first block.

Download Cairn: Form, create your account and answer a few questions about your week. Your first four-week block is built from your answers.

On the App Store for iPhone and on Google Play for Android.

Download on the App Store Get it on Google Play

Before you ask

The short answers.

Is it out?

Yes. Cairn: Form is on the App Store and Google Play.

iPhone or Android?

Both. The same app, the same programme and the same subscription, on the App Store and Google Play.

Do I need to be experienced?

No. Setup asks what you can train with and how long you have been training, and builds the first block from that. Beginners get a straightforward block; experienced lifters get more to work with.

Where does my training data live?

On your device. The Cairn: Form privacy policy sets out exactly what is stored, what leaves the phone and what you can delete, including deleting your account.

Cairn: Form is built by ASACE Labs, an independent company in England. Questions before you download are welcome at support@asacelabs.com.

The longer story