NOOP: Use Your WHOOP Without the Subscription

If you stop paying for WHOOP, the strap on your wrist doesn't stop working. WHOOP just stops collecting and analyzing your data. An unofficial project called NOOP picks up where they leave off.

NOOP connects to a compatible WHOOP strap and does the math on your own phone. No WHOOP account. No subscription. The band itself still isn't free, and NOOP's numbers are its own estimates, not WHOOP's scores or medical measurements.

What NOOP actually does

It talks to the strap directly over Bluetooth, stores readings locally, and calculates sleep, heart-rate variability, recovery, and strain on your device. The project says plainly that it's unofficial and not affiliated with WHOOP. Its calculations approximate published methods. They don't copy WHOOP's proprietary algorithms.

The X post that got me looking linked to Zhoop, a personal iPhone fork of NOOP that adds weight-loss tracking. Its developer says the Bluetooth connection, storage, and analytics all come from NOOP.

How to try it

• Check your strap and phone. WHOOP 4.0 is the tested, supported path. WHOOP 5.0 and MG support is limited and still in progress.
• Read the official GitHub page first. Setup differs by device, so start at github.com/ryanbr/noop and read the current guide and platform notes.
• Install and pair. On iPhone it's a direct-download sideload, not the App Store. Some devices need extra setup.
• Import your history if you want it. NOOP can pull in WHOOP data exports and Apple Health history, or you can start fresh.
• Treat the results as estimates. Use the trends to reflect, not to diagnose. It's not a substitute for a doctor.

What to know before you switch

It's an independent project, so features, compatibility, and setup steps can change. The maintainers call some support, especially WHOOP 5.0 and MG, incomplete. Pairing may also affect the strap's connection to the official WHOOP app, so read the current pairing notes before you commit.

The numbers won't match WHOOP's, because the algorithms aren't the same. And NOOP's terms limit use to noncommercial purposes.

The bigger point

You don't need AI to use a WHOOP for free. What's interesting is that one independent developer wrote software that gives people another way into data from hardware they already own. The core tracking runs locally. The optional AI Coach only works if you bring your own API key, so nothing depends on a paid AI service.

If you already own a compatible strap and want out of the membership, NOOP is worth a look. Check compatibility first, know the scores are estimates, and decide if a simpler, independent app covers what you actually use.