Today: recovery, sleep and load, and the planned session with its export and intervals.icu buttons

Three routes in and out.

Tap a connection to see what it does.

  • Rides in · Free

    From Strava or a Hammerhead Karoo, and from nothing else.
  • Your night in · Free

    HRV, heart rate and sleep from Apple Health or intervals.icu.
  • Sessions out · Elite

    To a Hammerhead Karoo or to intervals.icu, and from there to the device you sync; or as a ZWO or FIT file.

Comes in

Goes out

…and on to Garmin · Zwift · MyWhoosh

You send each session yourself; there is no automatic sync.

Strava

Rides in · Free

Each ride you save reaches Summit through Strava’s webhook. Earlier rides come in through a queue, not all at once: Strava’s read quota is shared by every Summit user.

Route map, ride stats and share cards are free; the detailed analysis is Pro.

Hammerhead Karoo

Rides in Free · sessions out Elite

The direct integration, no middleware. Rides come straight in; one tap sends the day’s session straight to the head unit, in watts or in heart rate.

Apple Health

Recovery and sleep in · Free

Read-only, and the readings stay on your iPhone. Any wearable that writes to Apple Health works, though only the Apple Watch writes the complete set of metrics Summit uses.

Apple Health feeds recovery and sleep, never rides.

intervals.icu

Wellness in Free · sessions out Elite

On any plan, a Garmin, Whoop or other device synced there feeds HRV, resting heart rate and sleep to your recovery score. On Elite, a session sent to it reaches Garmin, Zwift, MyWhoosh or whatever you sync there.

You send each session yourself; there is no automatic sync.

ZWO and FIT files

Elite

The day’s session as a file. Zwift imports either directly; a ZWO is always in watts, while a FIT carries heart-rate targets if you train by heart rate. On a Garmin, copy the FIT over USB.

What is not integrated.

Said plainly, so you know before you install.

Wahoo
No direct Wahoo integration today.
Garmin Connect
No direct connection. Garmin Connect treats a loose workout file as a route, so sessions reach a Garmin through intervals.icu or as a FIT copied over USB.
An Apple Watch app
There is none. The watch is the sensor, and Apple Health hands its readings to the iPhone.
Reading a wearable directly
Summit reads Apple Health or intervals.icu, never a Garmin, Whoop or other device on its own.
Rides from anywhere else
Neither Apple Health nor intervals.icu is a source of rides. Rides come only from Strava or the Karoo.

In the app.

A completed ride matched rep by rep against the planned session
A ride inFrom Strava or the Karoo, matched against the planned session.
Recovery: HRV, resting heart rate, sleep, temperature, respiration and SpO₂ in your own range
Your night in · FreeEach signal against your own range.
A planned workout: its structure, TSS and how to ride it
A session out · EliteThe structure that goes to the Karoo, to intervals.icu or into a file.

What comes in is free. What goes out is Elite.

In the appPlan
Rides imported from Strava or a Hammerhead KarooFree
Recovery and sleep data from Apple Health or intervals.icuFree
Route maps, ride stats and share cardsFree
Detailed ride analysisPro
Sessions sent to a Hammerhead KarooElite
Sessions sent to intervals.icu, and on to Garmin, Zwift or MyWhooshElite
ZWO and FIT downloadsElite

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 →

Questions before you start.

Does Summit work with Garmin?+

Through intervals.icu, not directly. Synced there, your Garmin's HRV, resting heart rate and sleep feed your recovery score, free; Summit shows the device's own sleep score. On Elite, sessions sent to intervals.icu reach the Garmin, or you copy the FIT file over USB.

Can I send sessions to a Wahoo?+

Not directly: the current release has no Wahoo integration. Sessions go to a Hammerhead Karoo, to intervals.icu and on to the devices you sync there, or out as a ZWO or FIT file.

Is there an Apple Watch app?+

No. The watch is the sensor: it writes to Apple Health, and Summit reads Apple Health on the iPhone. Nor is one required: any wearable that writes to Apple Health works, though only the Apple Watch writes the complete set of metrics Summit uses.

Can I ride Summit sessions in Zwift or MyWhoosh?+

Yes, on Elite. Zwift imports Summit's ZWO or FIT file directly, and intervals.icu can pass a session on to Zwift or MyWhoosh. A ZWO is always in watts, because Zwift rides on a smart trainer.

Which integrations are free?+

Ride import from Strava or a Hammerhead Karoo, and recovery and sleep data from Apple Health or intervals.icu, on every plan, permanently; the free tier is not Premium's 14-day trial. Sending a session out, to the Karoo, to intervals.icu or as a file, is Elite. The pricing page has the prices and their caveat.

Connect what you already use.

Download Summit, then connect Strava or your Karoo for rides and Apple Health or intervals.icu for your night. Both are free; sending the session to your head unit is Elite.

Download on the App Store iOS 26+ · iPhone · Free