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From £2.49 a month

The app that
picks your
next set.

OCTANE remembers every rep you've logged, reads your sleep and your plate, and tells you exactly what to lift today. Snap a meal for calories, macros and 28 micronutrients. Then let the coach talk you through the rest.

  • Core from £2.49/month
  • 7-day free trial
  • Cancel any time
OCTANE dashboard showing today's session, the calorie ring, macro targets and the 7-day forecast
  • Plans from £2.49 a month
  • Progressive overload
  • Meal photo → macros
  • 28 micronutrients
  • Apple Watch live heart rate
  • Saved splits
  • Streaks that survive rest days
  • Voice coaching
  • Home Screen widgets
  • Import from Hevy & Strong
  • Apple Health sync
  • Works offline
  • Food Bank
  • 7-day forecast
  • Insights & habit tips
A workout in OCTANE with the coach card suggesting the next weight and reps for an exercise
Training

Every session, planned by the last one.

Open a workout and the numbers are already there. The coach reads the full history of each exercise, not just one template, and hands you a target with a fallback. Beat it and it asks for more next time. Stall, and it calls a deload before you burn out.

  • A target for every exercise

    Last session, next target, one tap to apply. The alternative path, more weight for fewer reps or the other way round, sits right beside it.

  • Saved splits

    Push / Pull / Legs, Upper / Lower, a deload week. Keep them all and swap the whole rotation in two taps. The 7-day forecast follows.

  • Live heart rate on your wrist

    Start on the phone and it's already on the Watch. Heart rate and calories stream into the session, on lifts as well as cardio.

  • Pause, rest, resume

    Rest countdowns in the Dynamic Island, a pause that doesn't count against your time, and a summary with the full heart-rate trace when you're done.

Nutrition

Snap it. Logged. Down to the micronutrients.

Photograph the plate and OCTANE returns calories and macros in seconds. Add a detail like “cooked in olive oil” and the estimate sharpens. Underneath the macros, 28 micronutrients are tracked against daily targets set for your age and sex, so you find out you're short on iron before it costs you a session.

  • Photo to macros

    Snap or describe a meal. Every item gets its own line, and a one-tap refine fixes the bits it got wrong before anything is saved.

  • 28 micronutrients and your supplements

    Iron, magnesium, B12, omega-3 and the rest, with targets you can edit. Log your supplement stack and it counts toward the same day.

  • A daily nutrition score

    One number across energy, macros and micronutrients, so you can tell a good day from a merely full one.

  • Your usuals, one tap

    Food Bank items appear as you type. Copy any of the last 14 days onto today. Scan the barcode when it's packaged.

The Fuel tab in OCTANE showing the energy budget, macro progress, nutrition score and logged meals
A conversation with the OCTANE coach referencing recent workouts and sleep
AI Coach

A coach that remembers every rep.

Ask why your bench stalled and it answers with your last six sessions, last night's sleep and this morning's breakfast in view. It keeps notes on what you tell it, notices your habits, and speaks in whichever voice you want it to.

  • Built on your data

    Workouts, meals, goals, Apple Health and your 7-day forecast are all in context. No generic advice.

  • A personality that learns

    Five coaching styles, from Drill Sergeant to Science Nerd, or write your own. It remembers your preferences between conversations.

  • Voice mode

    Talk to it hands-free between sets, live, with the same tools as the chat. Included with Olympian.

  • Sources, when it looks things up

    Ask about a study or a supplement and it searches the web, then shows you where the answer came from.

  • Insights and a Sunday summary

    An AI read on how you actually train, habit tips drawn from your own logs, and a weekly summary with a coach's note every Sunday.

Everything else

Built for the whole day, not just the hour in the gym.

Apple Watch app

Live heart rate and calories on lifts, not just cardio, with the elapsed clock on your wrist. Every saved session keeps its heart-rate trace.

A saved workout summary with duration, volume and a heart-rate chart from Apple Watch

Streaks that survive rest days

A two-tier streak: a scheduled rest day never breaks it, and freezes cover the days that would. Consistency, made visible.

The streak screen with the flame, current streak count and the week at a glance

Widgets and Live Activities

Your streak and next session on the Home Screen with quick actions built in. Rest timers count down in the Dynamic Island.

Share cards

Session stats and heart-rate bands, styled for your story. No watermark you didn't ask for.

Import from Hevy and Strong

Bring your whole training history over as a CSV. The coach's recommendations start from day one.

Apple Health, both ways

Workouts and weight are written to Health. Steps, sleep and energy are read back so the coach can factor in recovery.

Works offline

Log in a basement gym with no signal. Everything syncs the moment you resurface.

Face ID lock

Lock the app behind Face ID or Touch ID. Delete your account and everything with it, any time, from Settings.

Latest release

Shipping every week.

OCTANE is built by a lifter who uses it every day, so the rough edges get found fast. Here's what changed in the most recent release.

  1. 01

    Smarter meal photos

    Add a few words to a photo and the numbers sharpen. Even “cooked in olive oil” moves them.

  2. 02

    Copy from any day

    Eating like Tuesday? Pull any of the last 14 days onto today, untick what you skipped, and everything lands in its original slot.

  3. 03

    Food Bank as you type

    Start typing something you’ve saved before and it appears as a one-tap chip. No wait, no retyping.

  4. 04

    Swap your entire split

    Saved rotations switch in two taps, with NEXT UP marked on whichever day the forecast says is next.

  5. 05

    See what earned each muscle

    Tap any muscle on the dashboard for a day-by-day breakdown of which exercises credited it. Got one wrong? Reclassify it.

Pricing

Start from £2.49 a month.

Core is the whole tracker: unlimited logging, AI meal analysis, barcode scanning and the overload engine. Add the AI coach with Athlete, or go all in with Olympian. Every new account starts with a 7-day free trial, and one login works in the app and on the web.

Start here
Core
£2.49/month

Every tracking feature, none of the AI coach

  • Unlimited workout logging
  • Unlimited meal tracking
  • AI meal analysis
  • Unlimited barcode scanning
  • Progressive overload engine
Get the app

7-day free trial · App Store or web checkout

Athlete
£6.99/month

Everything in Core, plus the AI coach

  • Everything in Core
  • AI coaching chat
  • AI personality + memory
  • Enhanced meal analysis
  • Smart food suggestions
  • Insights and habit tips
Get the app

7-day free trial · App Store or web checkout

Most popular
Olympian
£12.99/month

Everything in Athlete, plus voice coaching and the highest limits

  • Everything in Athlete
  • Highest AI coaching limits
  • Voice coaching
  • Advanced AI personality
  • Advanced food suggestions
  • Early access to new features
Get the app

7-day free trial · App Store or web checkout

Already have an account? Compare plans and subscribe on the web. Prices in GBP, billed monthly, auto-renew until cancelled.

FAQ

Questions, answered.

Anything else, email contact@asyncstudios.co.uk and a human replies.

Is there a free trial?
Yes. Every new account gets seven days of the Athlete plan free, so you can try the coach before you pick a plan, and you don’t need to subscribe to start it. When it ends, choose Core, Athlete or Olympian. If it isn’t for you, delete the app and nothing is charged.
Which devices does it run on?
iPhone, with a companion Apple Watch app for live heart rate and calories during sessions. There is no iPad or Android version today.
Does it work with Apple Health?
Both ways. Workouts and body weight are written to Health; steps, sleep and active energy are read back so the coach can factor recovery into what it asks of you. You choose exactly what to share.
Can I bring my history from another app?
Yes. Export a CSV from Hevy or Strong and import it from Settings. Your sessions appear in the calendar and the progressive overload engine starts recommending from them straight away.
How does the meal photo analysis work?
Take a photo or type a description. OCTANE identifies each item and estimates calories, macros and micronutrients, and you review everything before it saves. Add a detail like the cooking oil or a portion size to tighten the estimate, or scan the barcode if it’s packaged.
What’s the difference between Core, Athlete and Olympian?
Core, at £2.49 a month, is the whole tracker: unlimited workout and meal logging, AI meal analysis, barcode scanning and the progressive overload engine. Athlete adds the AI coaching chat with personality and memory, smart food suggestions and Insights. Olympian raises the AI limits, adds voice coaching and an advanced coach personality, and gets new features first. Core is bought in the app; Athlete and Olympian can also be bought on the web. See the full comparison.
Can I cancel whenever I want?
Yes. Subscriptions renew monthly until you cancel. If you subscribed through the App Store, manage it in your iPhone’s Settings under Subscriptions. If you subscribed on the web, use your account page.
What happens to my data?
It stays yours. We never sell it, and you can delete your account and everything attached to it from the app at any time. The details are in the Privacy Policy.

Your next set is already picked.

Plans from £2.49 a month. Download OCTANE, log one workout, and see what it says about the next one.

7-day free trial · Also on Apple Watch · Subscribe on iOS or the web