Whoop vs MetricBridge: A Band and a Membership, or the Apple Watch You Already Wear
Whoop is a screenless band sold with an annual membership, with its own sensor, its own scores and a coach in the app. MetricBridge is an iPhone app that works from the Apple Watch you already wear: it answers what you ask about your Apple Health data on your iPhone, shows the numbers behind every answer, and hands the data to your own AI agents. They overlap less than the word "recovery" suggests.
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MetricBridge makes one of the products compared. Facts about Whoop come from Whoop's own pages and its US App Store listing, read on 11 November 2026, each linked where it is used.
Quick answer. Keep Whoop if you want a band you never take off, two weeks of battery, no screen, a coach built into the app, or Whoop's health features such as Healthspan or the ECG on its top tier. Pick MetricBridge if you already wear an Apple Watch and want a readiness estimate whose every weight is published, answers you can check against your own numbers, your full Apple Health history as a file you keep, and Claude, Cursor or another MCP client reading your data. Both are wellness tools, not medical advice.
How we checked. Every Whoop fact below comes from whoop.com, Whoop's privacy policy, its developer docs and its App Store listing, all read on 11 November 2026. Where Whoop's pages do not say something, we say "not stated" rather than guess. If something here is out of date, tell us at [email protected] and we will fix it, with the date updated.
Side by side
| Whoop | MetricBridge | |
|---|---|---|
| What it is | A screenless band plus a membership: Whoop's own sensor, Sleep, Recovery and Strain scores, and a coach in the app | An iPhone app that reads Apple Health: on-device answers with the numbers shown, a readiness estimate, reports, and an export plus an MCP server for your own agents |
| What you need | A Whoop band, which comes with the membership. "The WHOOP app requires a WHOOP wearable" | An iPhone. For readiness, any Apple Watch that records HRV and resting heart rate |
| Price (US) | One $199, Peak $239 or Life $359 a year, as a 12-month membership; band and charger included; a one-month free trial on the App Store | 7-day free trial, then $24.99 once for everything. No subscription |
| The daily score | Recovery as a daily percentage, from HRV, resting heart rate, sleep and respiratory rate; Whoop names the inputs but its pages do not publish the weights | A readiness estimate with its range, since 1.20, every input, weight and window on /methods/. No recovery score |
| The coach | WHOOP AI, in every tier. Whoop's privacy policy says de-identified metrics go to "our LLM partner"; it launched on OpenAI's GPT-4 | Ask, on your iPhone: Guided mode, Apple's on-device model or an optional downloaded model, each answer showing its days and samples. No cloud AI option |
| Where your data lives | In your Whoop account; the App Store listing says "all your data lives in the WHOOP app" | In Apple Health on your iPhone. No account; the export goes only where you point it |
| Your own AI agent can read it | A developer API with read-only OAuth scopes (recovery, sleep, workouts, cycles). Whoop's developer site does not mention an MCP server | Yes: an open-source MCP server, 22 tools (20 read-only), reading the export on the machine your agent runs on |
| Getting your data out | A CSV export, emailed as a link that expires after 7 days. Apple Health sync of sleep, resting heart rate, respiratory rate, workouts and more, but not HRV or the Recovery and Strain scores | 194 metrics as JSON or CSV, full history, on a schedule, to iCloud Drive, a folder, your network or a webhook |
| On your wrist | The band: no screen, 14+ days of battery. The App Store listing names iPhone and iPad only, no Apple Watch app | An Apple Watch app with complications since 1.20, showing the readiness estimate; not a separate purchase |
| Health extras | Healthspan and WHOOP Age (Peak and Life); ECG readings and blood pressure insights (Life); Advanced Labs blood tests, bought separately | Training load, heart-rate zones and a strength log since 1.21; two PDF reports (doctor summary, 12-month activity) |
Whoop facts read 11 November 2026 on whoop.com/membership, the Life page, How recovery works, the privacy policy, developer.whoop.com, data export, its support articles on export and Apple Health (read 12 November) and the App Store listing. MetricBridge facts as of the latest version (changelog). Prices vary by country and change often.
Where Whoop is the better pick
- Its own sensor, worn all the time. The band stays on through the night and the shower, with no screen and two weeks of battery. An Apple Watch needs charging most days, and anything it misses while charging is missing from Apple Health too.
- A coach in the app. WHOOP AI comes with every tier. MetricBridge answers what you ask and shows the numbers, but it does not check in on you or write you a plan.
- Strain and day-to-day coaching built around one device. Whoop's scores, journal and coaching are designed together. MetricBridge works from whatever your Apple Watch and other apps write to Apple Health.
- Health features we do not have. Healthspan and WHOOP Age on Peak and Life; ECG readings and blood pressure insights on Life; blood tests through Advanced Labs. MetricBridge has none of these.
- No Apple Watch needed. If you do not own one, Whoop's membership includes the hardware. MetricBridge's readiness estimate needs a watch that records HRV and resting heart rate.
- Support and warranty. Whoop lists a lifetime warranty and 24/7 support with the membership.
Where MetricBridge is the better fit
- You already wear an Apple Watch. It already records HRV, resting heart rate and sleep into Apple Health. MetricBridge works from that, so there is no second device on your other wrist.
- A method you can check. Every input, weight and window behind the readiness estimate is published on /methods/. Whoop names its recovery inputs; its pages do not publish the weights (a 2025 review found the same across 14 wearable scores, Whoop's included: Doherty et al.).
- Answers on your iPhone. Ask runs on the phone, and every answer shows the days and samples it used. There is no setting that sends a health question to a cloud model.
- Your own agents. The open-source MCP server lets Claude, Cursor, VS Code, opencode and other clients read your real numbers, from the machine they run on, with 20 of its 22 tools read-only. Whoop offers a developer API for apps; MetricBridge is built for your own agent.
- Your whole history as a file. The first export backfills everything Apple Health holds, and scheduled exports keep it current, as JSON you can script against.
- One price. $24.99 once unlocks everything. There is no membership to renew.
If you are thinking of dropping the band
Decide what you would miss first. If it is the coaching, the all-day sensor or a Peak or Life feature, keep Whoop: nothing here replaces those. If what you use is the morning number and you already wear an Apple Watch, the switch is mostly about your data:
- Export your Whoop history before the membership ends. In the Whoop app, its support article gives the path as More, App Settings, Data Export. Whoop emails a link to CSV files, which expires after 7 days, and its own page says to download them before the membership expires.
- Check what is already in Apple Health. If you turned on Whoop's Apple Health integration, its support article says it writes sleep, resting heart rate, respiratory rate, blood oxygen, workouts and more. MetricBridge can read and export that alongside your watch data, labelled with the device it came from. Whoop does not write HRV or its Recovery and Strain scores to Apple Health, so those stay in Whoop's app and your CSV; importing them is in development. The full checklist: cancel Whoop without losing your data.
- Let it read your history. The readiness estimate compares last night with your own previous 60 days, from the HRV, resting heart rate and sleep your watch has already written to Apple Health. If that history is there, there is nothing to wait for; if not, the card says "Not enough data" and why, until there is.
- Read the two numbers on their own terms. Whoop's band and an Apple Watch measure HRV differently, so do not compare a Whoop recovery percentage with a MetricBridge readiness estimate as if they were the same scale.
Can you use both?
Yes. MetricBridge only reads Apple Health, so it does not conflict with Whoop. Whatever Whoop writes into Apple Health, MetricBridge can include in answers and exports, labelled with its source device, and your agents can read it through the MCP server. Whoop's HRV and its Recovery and Strain scores are not written to Apple Health, so they stay in Whoop's app.
The same caution applies to both
Both describe your own data against your own history. A low morning number is a prompt to notice, not a diagnosis, and a pattern in your data is not proof that one thing caused another. Use either to notice and ask, and a clinician to decide.
Keep your watch. Check every number.
A readiness estimate with the method published, on-device answers with provenance, 194 metrics as JSON and 22 MCP tools (20 read-only). Free trial, then $24.99 once.
7-day free trial, then $24.99 one time. Not a subscription. No account. Your health data never reaches us or a cloud AI; the export goes only where you point it. Works on any iPhone; a ~400 MB on-device model covers phones without Apple Intelligence. Where your data goes · How the numbers are computed
Frequently asked questions
What is the difference between Whoop and MetricBridge?
Whoop is a screenless band with an annual membership, its own sensor, Sleep, Recovery and Strain scores and an AI coach in the app. MetricBridge is an iPhone app that works from the Apple Watch you already wear: it gives a readiness estimate with every weight published, answers your questions on your iPhone with the numbers shown, exports your Apple Health data and lets your own AI agents read it over MCP.
How much do Whoop and MetricBridge cost?
Read on 11 November 2026 on whoop.com: Whoop One is $199, Peak $239 and Life $359 a year, as a 12-month membership with the band included. MetricBridge has a 7-day free trial and then a single $24.99 purchase that unlocks everything, with no subscription. Prices change and vary by country.
Is MetricBridge a Whoop alternative if I wear an Apple Watch?
If you wear an Apple Watch and mainly use a morning number, MetricBridge's readiness estimate covers that job, with its method published. It does not replace Whoop's always-on band, coaching or Peak and Life health features, and it is not a recovery score.
Can my AI agent read my Whoop data?
Whoop offers a developer API with read-only OAuth access for apps; its developer site does not mention an MCP server, as of 11 November 2026. Whatever Whoop writes into Apple Health, MetricBridge's open-source MCP server can read from your export, along with everything else in Apple Health; Whoop's HRV and its Recovery and Strain scores are not in it.
How do I keep my Whoop data if I cancel?
Request Whoop's data export in the app (its support article gives the path as More, App Settings, Data Export) and download the emailed CSV files within 7 days, before your membership expires. Whoop does not write HRV or its Recovery and Strain scores to Apple Health, so the export is the only copy of those you keep.