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Looking for a Xert alternative because you ride without a power meter, or because you want the plan to account for how you slept? Xert models your physiology from your power data, with no test to ride; Summit measures your recovery overnight and builds the week around the minutes you have.
Pick Xert if you…
- ride with a power meter and want your thresholds to come out of your rides, never out of a test
- want the power analysis to go deep: a three-number Fitness Signature, real-time MPA, breakthroughs
- need a web app or Android as well as iPhone
- want the app running on your Garmin Edge or Karoo itself
Pick Summit if you…
- have an iPhone and wear a watch at night
- ride without a power meter, or not always with one (Elite)
- want the plan built on the minutes you have each weekday
- want the recovery and sleep read free, permanently
At a glance
| Summit | Xert | |
|---|---|---|
| Platforms | iPhone, iOS 26 or later | Web, iOS and Android; native apps on Garmin Edge and Karoo |
| Sports | Cycling; other activities count as load | Cycling |
| Thresholds | An FTP or LTHR test in the plan; eFTP from your rides (Pro) | A Fitness Signature from your ride data, with no separate test |
| Adapts to your schedule | Yes — minutes per weekday as a weekly pattern, plus a change to today's time | Daily targets adapt to your status, goals and completed rides; time per weekday not documented on its pages |
| What moves today's session | Recovery measured overnight, plus your completed rides | Training load, fatigue and freshness, from your rides |
| HRV and sleep | From Apple Health, or intervals.icu for a Garmin or Whoop | Not documented on its pages |
| No power meter | Every session by heart rate and feel | Not documented on its pages |
| Workout library | No — each session is built from your own load | Yes — 400+ workouts built around your Fitness Signature |
| Free tier | Recovery, sleep, trend and widgets — permanently | A free Starter plan on its home page; a 30-day trial on its pricing page |
| Sessions out | Karoo; intervals.icu → Garmin, Zwift, MyWhoosh (Elite) | Garmin Edge and Karoo apps; Zwift, Rouvy, MyWhoosh |
| Price shown in | Euros, App Store | US dollars, baronbiosys.com |
What each one reads before it sets your day
Both keep the plan moving with you: Xert says its training programs "adapt and evolve with you as you train" (baronbiosys.com), and Summit rebuilds the week around the minutes you have. The difference is where each one looks:
Xert
- It readsThe power of every ride — in its words, "every watt you've ever produced"
- It becomesA Fitness Signature (Peak Power, High Intensity Energy, Threshold Power), XSS for training load, and Maximum Power Available in real time
- TodayThe Adaptive Training Advisor sets a daily training prescription
Summit
- Your watch measuresHRV, resting heart rate and sleep, via Apple Health or intervals.icu
- It becomesA recovery score against your own baseline
- TodayThe session stands, grows or loses its intensity — on Apple Health, usually before you open the app
None of the Xert pages we read mentions HRV or sleep; the status they describe is built from your rides. That is what those pages document, not proof that Xert ignores them, so ask Xert if it matters. Summit reads your night as well as your rides, and with no fresh reading the plan holds rather than guessing. Any wearable that writes to Apple Health works, though only the Apple Watch writes the complete set of metrics Summit uses.
What each one costs
Different currencies, so not compared. Xert: US dollars, $99.95 billed yearly ($8.33 a month) or $14.99 billed monthly; its pricing page shows a 30-day free trial with no credit card, and its home page a free Starter plan, baronbiosys.com/discovery/pricing, checked 3 November 2026. Summit: Elite is the tier with the adaptive plan; Pro is €3.99 a month or €24.99 a year; recovery and sleep are free at every tier. Spanish App Store, VAT included, checked 17 September 2026 — Apple sets the price per storefront, so yours may differ (full caveat).
Where each one wins
Xert wins on
- No test, ever — your thresholds come out of your rides; Summit puts an FTP test, or a 30-minute LTHR test by heart rate, into the plan
- Depth of power modelling — a three-number Fitness Signature, Maximum Power Available in real time, breakthroughs as they happen
- Every screen — a web app, iOS and Android; Summit is iPhone only
- On the head unit itself — native apps for Garmin Edge and the Karoo; on Elite, Summit sends sessions to the Karoo, and to Garmin through intervals.icu
- A workout library — 400+ workouts built around your Fitness Signature, and Xert on Zwift, Rouvy and MyWhoosh
- A free way in — a free Starter plan on its home page, a 30-day trial with no card on its pricing page
Summit wins on
- The night — HRV, resting heart rate and sleep, measured overnight, are part of what moves the plan
- No power meter required — sessions can be ridden by heart rate and feel; power analysis still needs power
- The time you have — minutes per weekday as a weekly pattern, today's time, holidays and the days you ride your own way (Elite)
- Free, permanently — recovery score, sleep, trend and widgets
- Race-day fuelling — carbohydrate, fluid and electrolytes per hour, built around the products you use (Elite)
- Traceable decisions — every change traces to a rule and to your own data
See what your own night says tomorrow morning.
Install Summit, allow it to read your Health data, and connect Strava. From the first morning Summit can compute it, you'll have a recovery score, a full read of your sleep, and nothing to fill in. Free, permanently, with no trial to expire.
Questions people actually ask
Is Summit a Xert alternative?
For riders with an iPhone, yes, though not a like-for-like one. Xert models your physiology from your power data: a Fitness Signature of Peak Power, High Intensity Energy and Threshold Power, derived from your rides with no separate test, and a daily prescription from its Adaptive Training Advisor. Summit builds a structured cycling plan around your events and the minutes you have each weekday, and also measures HRV, resting heart rate and sleep overnight through Apple Health or intervals.icu to adjust the session. If deep power modelling is what you want, or you need a web app or Android, Xert is the better fit.
Can I train without a power meter?
With Summit, yes, since app 1.7.0: every structured session can be ridden by heart rate, with long, steady work set against your threshold heart rate and short, hard work by feel, and it reaches the Karoo or intervals.icu with heart-rate targets; the full session is Elite, and the power analysis (eFTP, CP, W′, the power curve) still needs power. The Xert pages we read on 3 November 2026 describe a platform built on your power data and do not say how it works without a power meter, so ask Xert if that is your situation.
Does Xert use HRV or sleep from my watch?
Not that its own pages say. The Xert pages we read on 3 November 2026 describe your training load, fatigue and freshness from your rides, and none of them mentions HRV, sleep or a wearable readiness score. That is what those pages document, not proof that it ignores them. Summit reads HRV, resting heart rate and sleep overnight from Apple Health, or from intervals.icu for a Garmin or Whoop, and the recovery score it computes is part of what moves the plan.
How much does Xert cost compared with Summit?
On baronbiosys.com on 3 November 2026, Xert Premium is $14.99 a month or $99.95 a year, in US dollars; its pricing page shows a 30-day free trial with no credit card, and its home page a free Starter plan. Summit Elite, the tier with the adaptive plan, is €9.99 a month or €69.99 a year, and Pro is €3.99 a month or €24.99 a year — the Spanish App Store listing, VAT included, checked 17 September 2026; the recovery and sleep read is free. The currencies differ, so we make no price claim between them, and Apple sets Summit's price per storefront, so yours may differ.
Which one adapts to my schedule?
Summit takes minutes per weekday as a weekly pattern, a change to today's time, holidays and the days you ride your own way, keeps the week's training load when you miss a session, moves a missed key session to a later day of the same week, and stops the day when you flag an illness or injury. Xert's training programs adapt to your status, your goals and the rides you complete, and its Forecast AI maps how your fitness should develop towards a target event date; the Xert pages we read do not describe setting time per weekday. If your week is the hard part, that is the question to put to Xert.
Sources — Xert's own pages, checked 3 November 2026
- baronbiosys.com — Fitness Signature; MPA; XSS; Adaptive Training Programs; a free Starter plan; Garmin Edge and Karoo apps; Zwift, Rouvy, MyWhoosh
- Pricing — $14.99 a month or $99.95 a year in US dollars; 30-day free trial, no credit card; "No feature tiers. No paywalls."; "Connect any power meter"
- Features — derived from your ride data, not a single test; Adaptive Training Advisor; Forecast AI; 400+ workouts; iOS, Android and Karoo
- How it works — "No separate test."; "every watt you've ever produced"; Strava or Garmin to connect
- xertonline.com — the web app
- App Store listing — Xert EBC, developer Baron Biosystems Ltd
Xert's pages speak of "Forecast AI" and "AI training plans". In Summit no model decides anything: the engine is deterministic, and every change to the plan traces back to a codified sports-science rule applied to your own data. Those pages are the authority on Xert, not this one.