Diastra · Heart Rate Training

Adaptive plans, 5k to marathon

Free · In‑App Purchases

Plan apps tell you what to do. Tracker apps tell you what you did. Neither tells you if it worked. Diastra does both jobs, and it connects them. Job one. The plan. Built from your real weeks, not a template. Mostly easy, a little hard, the mix the science backs. It climbs when you grow and eases when you are run down. Miss a week? The plan rebuilds around what really happened. Job two. The measure. Every workout is read minute by minute against your own normal. Your effort is sorted into what it really was. Easy. Threshold. VO₂max. A hard minute only counts when the effort truly held. Counted, not guessed. It starts on day one, reading every workout your watch ever saved. The plan sets the work. You work the plan. Diastra grades what happened. The next week gets smarter. Week after week, you see which way you are moving. Getting fitter. Holding steady. Slipping. Workouts end. Fitness stays. Diastra measures. On Apple Watch Record from your wrist. Live heart rate, and a gentle tap when you drift out of your band. Finished workouts save to Apple Health. Diastra works without an account. Subscription Diastra requires a subscription for full access. A 7-day free trial is included, and the price for your region is shown before you confirm. Diastra is a general wellness product. It does not diagnose, treat, or prevent any condition. Check with a doctor before you start something new, and stop if you feel unwell. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

  • 5.0
    out of 5
    2 Ratings

Every run now shows its miles on Workout Analysis. The number fills with the heart bands you ran in, from warm up at the bottom to VO₂max at the top. Hold it to read the miles in each band. On a treadmill, scan the treadmill's screen or type its number, and Diastra uses that distance for the run, your week and your pace. Plan now leaves the two days after a half marathon or marathon free. Share and Fix on Workout Analysis are two separate buttons again.

The developer, Antonio Samaniego, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Health & Fitness
    • Purchases
    • Location
    • Contact Info
    • Contacts
    • User Content
    • Identifiers
    • Usage Data
  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases
    • User Content
    • Identifiers
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
Antonio Samaniego
Size
43.8 MB
Category
Health & Fitness
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • Apple Watch
    Requires watchOS 10.0 or later.
Languages
English
Age Rating
9+
In-App Purchases
Yes
Copyright
© 2026 Diastra LLC