Log the set. Coach handles the rest.

Log fast

Fast enough for the rest between sets

Tap the set, it's logged. Warm-up ramps build themselves, the rest timer starts on its own, and the plate math tells you what goes on each side of the bar. Supersets, drop sets, AMRAPs, back-offs, RPE, and cardio with distance and pace all log without leaving the screen, and last time's numbers sit under every row. Every set type, in the guide.

879 exercises ship built in, with muscles, equipment, and form images. Logging lands instantly on your phone and catches up when you have signal, so airplane mode is a supported way to train.

Meet Coach

Coach is the trainer that reads your logbook

Coach knows every session you've logged, every PR you hold, and how much volume each muscle has taken this week. Ask what to do today and the answer comes from your training, not from a blog post.

Coach does the math, it doesn't guess at it. Every weight comes back through the same plate calculator and %1RM tables that run inside the app, so it cannot round a lift wrong in a sentence.

Coach proposes, you approve. A new workout, a change to your routine, a settings tweak — each arrives as a card you accept or discard. The notes Coach keeps about you live on one screen you can edit or revert.

Coach comes with a free trial on any plan, no card. After that it's paid: on Pro you bring your own AI key, with a month free; on the AI plan we run it for you.

Coach also writes on its own: a short review of a session a couple of minutes after you finish it, and a summary when your week turns over. Those run in the background without you asking, so there is a switch — Summarize my workouts, under Settings → AI coach & memory. With it off neither is written, and nothing about a session is sent to a model for one. What goes out while it is on is set out on the privacy page.

Wrist and lock screen

Train from your wrist

On Apple Watch, the watch does the whole workout. Leave the phone in the bag. Pick a workout on the watch, log every set with the Digital Crown, type exact weights on a real keypad, and the session uploads itself when you're done — offline the entire time is fine. Running the workout from your phone instead? The watch mirrors it live.

Cardio too: treadmill or GPS, with live pace, distance, and heart rate. Every session runs a real HealthKit workout, so it counts toward your rings.

On Wear OS, the watch mirrors a workout running on your phone. The set you're on, the load and the reps — change either from the wrist, check the set off, and run the rest countdown there. The phone stays in charge: the workout starts there, and it needs to be with you.

Phone in hand, the workout sits on your lock screen. On iPhone that's the Live Activity and the Dynamic Island — current exercise, sets done, next target — and you can log the set or add fifteen seconds without opening the app. On Android the same workout mirrors quietly into your notification shade, as something to read rather than tap.

The watch app is part of Pro, on both wrists.

Charts and the dashboard

Numbers that mean something

Six kinds of personal record are caught on every set, and corrected backwards if you fix a mistake in old history. Estimated 1RM, top set, and volume chart per exercise over any window. Weekly volume per muscle is scored against real training landmarks, so a muscle that's under-stimulated — or running past what you'll recover from — is visible.

The home screen is yours to build from eighteen widgets you drag, resize, and reorder. A thirty-second check-in on sleep, soreness, motivation, and stress turns into a concrete change to today's session, computed on your phone, on every plan.

Where it runs

Every surface, one account

• iPhone

  TestFlight beta

  Live Activity, Dynamic Island, Apple Health. The App Store release lands at launch — ask for a beta invite in the meantime.

• Apple Watch

  Included with Pro

  A full workout from your wrist. Installs from your iPhone once you have the app.

• Android

  Google Play at launch

  The whole logbook, Health Connect for finished sessions and bodyweight, and the live workout in your notification shade. The Google Play release lands at launch, with testing before it — ask to be told when it opens.

• Wear OS

  Google Play at launch

  Mirrors a workout running on your phone: the set you're on, the load and the reps, and the rest countdown, all changeable from the wrist. It follows the phone rather than replacing it, and it ships in the same Google Play listing as the Android app. Part of Pro.

• Web

  Available now

  The whole app at app.rezist.ai — nothing to install, same account, same data.

  

• Anything that speaks HTTP

  Included on every plan

  An MCP server for AI agents, a command-line client, a typed TypeScript SDK, and signed webhooks. More on that below.

Community and programs

Training is better with witnesses

Follow lifters, share a session to a feed, start a club, or run a challenge with a live leaderboard. Publish a program you've built, install someone else's in one tap, and keep the good ones in a collection — installs never count against your limits.

Your data, your API

No lock-in, by construction

Every feature in the app is a documented HTTP endpoint — over 140 of them, from one typed schema. There's an MCP server so any AI agent can log your training, a command-line client, a TypeScript SDK, signed webhooks, and scoped tokens.

Your routines export as YAML you can edit and import back with a dry-run diff; your account exports as JSON in one tap; deleting is one tap and permanent. Coming from Strong or Hevy? Paste the CSV, preview exactly what will be created, then import. None of it is behind a plan.

Pricing

Take your training further

Questions

The short answers

Start your next session in Resistance

Free to start. No card. Export or delete everything whenever you want.