This app helps you scientifically test health claims about supplements, routines, and lifestyle changes. It guides you through 21-day experiments using your own body data and provides clear verdicts based on your metrics.
1.0.1
July 8, 2026
Your Signal, right at the top of Your data. We built you a portrait — a little waveform that's actually you. It's generated from your own sleep, recovery, heart rate, and movement, so no two people's ever look the same. Tap it and it flips over to show you the real numbers behind it. Still building your baseline? It'll look like it's still forming — that's normal, and it fills in as your data comes in.
MoreUnlimited 21-day experiments + insights.
Protocol is a health and fitness app that allows you to scientifically test personal health claims related to supplements, routines, and lifestyle changes. It guides you through 21-day experiments using your Apple Health data to provide clear verdicts.
Protocol works by helping you define a claim, setting up a structured 21-day experiment, and then reading your Apple Health data. It measures your metrics before and after the test period to give you a data-driven answer.
You can test claims about supplements like magnesium or ashwagandha, lifestyle changes like cutting caffeine, or routines like cold exposure. If a claim relates to data your phone or wearable measures (sleep, HRV, heart rate, activity), Protocol can test it.
No, Protocol does not contain advertisements. The app offers a premium subscription for advanced features.
Protocol Pro offers monthly and annual subscription plans. The monthly plan is $14.99 USD per month, and the annual plan is $119.99 USD per year, saving users 33%. Both plans include a 14-day free trial.
You can manage or cancel your Protocol Pro subscription at any time through your Apple App Store account settings. Auto-renewal must be turned off at least 24 hours before the end of the current period to prevent charges for the next period.
Yes, your data stays yours. Protocol only reads the Apple Health data you choose to share and does not sell, post, or share it with third parties. You can export your data or delete your account at any time.
Protocol has an age rating of 17+, indicating it is intended for mature users. This is likely due to the nature of health data and the potential for users to test various health-related claims.
