Summit is an adaptive cycling training app for iPhone: a training plan that adapts to your recovery and to your schedule, built on the time you actually have each day and still aimed at the date of your event.
iOS 26+ · iPhone · Free
Five things change what Summit asks of you, and each is read the same way every time.
Recovery score Free · adapted session Elite
HRV, heart rate through the night and sleep, read from Apple Health, or from intervals.icu if you train with a Garmin, a Whoop or another device synced there. Each signal is scored against your own baseline.
Today’s session stands, extends on a strong morning in a phase that allows it, or loses intensity on a poor one.
Elite
Set the minutes you can ride on each weekday and tick the days you would rather ride your own way. When today changes, change today alone.
Hard sessions stay off your own-way days, and the quality work goes to the others.
Elite
The week keeps its load: what you missed is spread across the days still open, and a missed key session moves to a later training day of the same week.
Reopen a cancelled day and the exact same workout comes back.
Elite
Mark an illness or injury in the morning check-in and today’s session is cancelled.
The plan rearranges the days that follow.
Elite
Give Summit a race date and the season is built backwards from it: base, build, peak and taper, then a load for each week, then the sessions that fit inside it.
With no event, the plan rolls forward on the goal you choose, to maintain or to build fitness.
What happens between falling asleep and the first pedal stroke, on the Apple Health route.
Your watch records HRV, heart rate through the night and sleep, and Apple Health hands them to the iPhone, where the recovery score is computed.
The score is read against your own baseline. With a short history it stays deliberately conservative, and with no fresh data it shows no score rather than yesterday’s.
In the background, today’s session stands, extends or loses intensity, down to soft activation or rest. With no reading at all, the plan holds exactly as written.
The engine is deterministic: no model decides anything, and each session’s load traces to a weekly budget, a phase and your event date.
The bibliography ships inside the app, each paper with its DOI, a tap away from the screens that use it. How the models are combined and weighted is not published: auditable does not mean replicable.
| In the app | Plan |
|---|---|
| Recovery score from your night | Free |
| Sleep score and sleep analysis | Free |
| Recovery trend and the recovery widgets | Free |
| Your races and events, on the calendar | Free |
| Fitness, fatigue and form (CTL, ATL, TSB) | Pro |
| Detailed ride analysis, eFTP, W′bal, the power curve and the effort calculator | Pro |
| The full session, in watts or heart rate, adapted every morning | Elite |
| Weekly availability, missed-session rebalancing and periodisation to your event | Elite |
| Sessions sent to a Hammerhead Karoo or intervals.icu, and ZWO/FIT files | Elite |
| Race-day nutrition for your event | Elite |
The free tier is permanent; Premium’s 14-day trial for new subscribers is a separate thing. Prices, with the storefront and VAT caveat, are on the pricing page →
No. Any wearable that writes to Apple Health works, though only the Apple Watch writes the complete set of metrics Summit uses. A Garmin, Whoop or other device synced to intervals.icu feeds HRV, resting heart rate and sleep to the same recovery score, which adapts the plan the same way; on that route Summit shows the device's own sleep score rather than issuing its own. There is no Summit app for the watch: the watch is the sensor, and the iPhone does the reading.
No, not since app 1.7.0. Every structured session can be ridden by heart rate: long, steady work is set in % of your LTHR, and short, hard work goes by feel, with an RPE, because heart rate lags. The power analysis (eFTP, critical power, W′ and the power curve) still needs power data. The full session, in watts or in heart rate, is part of Elite.
The week keeps its load. What you missed is spread across the days still open, and a missed key session moves to a later training day of the same week, never to a day already past or one without enough time. When you miss a session, the current week and the next are re-planned; one miss does not rebuild your season, and your event date does not move. Saving a change to your week re-plans the coming weeks.
Its engine isn't. No model decides anything: your recovery score, your fitness, fatigue and form, and your session are computed from your own data by codified rules built on published sports science, so every decision traces back to a rule you could check.
Your daily recovery score, the sleep score and sleep analysis, the recovery trend and the recovery widgets are free for as long as you use Summit, along with your rides imported from Strava or a Hammerhead Karoo and your races and events on the calendar. The adaptive plan itself, with the full session and the periodisation to your event, is Elite. Premium has a 14-day trial for new subscribers; the free tier is not that trial and does not expire. The pricing page carries the prices and their caveat.
Download Summit and connect Apple Health or intervals.icu. Your recovery score is free from the first morning it can be computed; the plan that adapts to it is Elite.
iOS 26+ · iPhone · Free