Frequently Asked Questions

Answers to common questions about how Rep works.

Calories & Activity

How does Rep estimate calories burned during a workout?

Rep uses two sources for calorie data, in order of accuracy:

1. Your wearable (when connected)

If you have Apple Health or Google Health Connect set up and a compatible wearable, Rep reads the active calories your device recorded during the session. This is based on your heart rate, movement, and personal stats — calculated by your wearable's own algorithms, not by Rep.

Compatible devices:

  • iOS: Apple Watch, Garmin, Polar, WHOOP (any device that writes to Apple Health)
  • Android: Samsung Galaxy Watch, Fitbit, Garmin, Pixel Watch (any device that writes to Health Connect)

Note: Fitbit on iPhone does not sync to Apple Health (Fitbit dropped that integration in 2022), so iOS Fitbit users will see an estimate instead.

2. MET-based estimate (when no wearable data is available)

If no wearable calories are recorded, Rep calculates an estimate using the MET (Metabolic Equivalent of Task) formula — the same method used by exercise scientists and most fitness apps:

Calories = MET × Body Weight (kg) × Duration (hours)

Rep uses a MET of 3.5 for strength training sessions, which is the established value for moderate-intensity resistance exercise. Your body weight is pulled from Apple Health or Health Connect if available, or from your profile if not.

This is an estimate. Individual calorie burn varies based on fitness level, intensity, and other factors — treat it as a useful ballpark, not a precise measurement.

Data & Privacy

Does my data sync across devices, and how is it stored?

See our Privacy Policy for full details on what we collect, how your data is stored, and how syncing works.

Account & Subscription

Is Rep free?

Rep is free for as long as it's free for us to run. Once our infrastructure costs require it, we'll introduce a paid plan — but everyone who signs up while it's free keeps free access for good.

Can I export my workout data?

Yes — head to Settings → Export to download your full workout history. We're also working on a Skill that reads your exported data to surface deeper insights, so stay tuned.

Updates & Development

How often is Rep updated?

We ship a new version roughly every two weeks, with bug fixes, performance improvements, and new features based on user feedback. See the changelog for what's new in each release.

How do I send feedback or report a bug?

Email us anytime — we read every message and use it to shape what we build next.

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