Subintervals is an independent Android companion app that turns your intervals.icu data into actionable training insights. It delivers detailed activity visuals and interactive graphs, with seamless sync to intervals.icu for up-to-date information, created by an enthusiast as a complementary tool to the official platform.
Pros & Cons
Strong 4.8 rating from 97 users
Active growth with 609 new downloads in the last 30 days
Seamless sync with intervals.icu for up-to-date data
Detailed, interval-focused visualisations and analytics
Internationalization with 8 languages
Does not include built-in workout timers or interval templates (e.g., timer, interval, HIIT)
Lacks explicit workouts/exercises or circuit tracking features
About Subintervals
Subintervals is a health & fitness app developed by Inaki Arroyo.
Download Statistics
Subintervals has been downloaded 9.5 thousand times. In the last 30 days, the app was downloaded 760 times.
User Ratings
Subintervals is rated 4.60 out of 5 stars. The rating is based on 210 ratings.
App Information
Subintervals is FREE to download. The APK download size is 95.66 MB. The latest version available is 1.19.0. The last update was on August 29, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play November 2024.
Description
Elevate Your Training with Subintervals
Subintervals transforms your intervals.icu data into actionable insights. This app brings your training activities, events, and performance metrics to life through detailed displays and interactive graphs. Customise and control your data for a tailored analysis, and seamlessly sync with intervals.icu for up-to-the-minute information.
Key Features: - Detailed visualisation of activities and events. - Dynamic, interactive graphs for performance tracking. - Effortless sync with intervals.icu.
Please note that it is an independent application developed by an enthusiast keen on providing a complementary tool to the official platform.
Recent changes: Improvements - Added metric histograms for heart rate, power, and pace. - Improved zone labels and ranges. - Fitness can now show achievements and selected-day activity summaries.
Bug Fixes - Improved chart cursor snapping and pan gestures.
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It's a wonderful interface to intervals.icu. The stats and tracking are clear even on a tiny phone screen. Some things, like adding some activities is easier in this app than directly in Intervals. There are a few things I wish it had. I hope that over time they get added as the author is active and responsive in the Interval forums. There are some minor bugs, like discrepancy between Intervals and this on the profile. Which is why I'm giving it a 4, for now.
★★★★★Gustavo Stocchero· Aug 20, 2026
The app displays information in a beautiful way and is a great companion to rhe intervals.icu website.
★★★★★Christian Dietiker· Apr 27, 2026
Installed this app after Daily TSS stopped working. Works beautifully! It has definitively more features that I need (like the workout builder), and its interface is very user-friendly. Kudos for not showing any ads 👍
★☆☆☆☆John Charnock· Feb 8, 2026
Won't show recent Strata data, something about privacy
★★☆☆☆bobotea· Sep 20, 2025
For some reason my activities do not load and im not able to see data for them
★☆☆☆☆Josh· Jun 6, 2026
Probably a nice app if the bottom button bar weren't hidden behind the android 3-button nav bar.
Google Play Rankings for Subintervals
This app is not ranked
Technologies used by Subintervals
14 permissions
Subscribe to see full permission and library details
Trust & Safety: The app requests a broad set of permissions including location (coarse and fine), network and internet access, storage (read/write), biometric usage, and in-app billing. It also references a dynamic receiver not exported. This level of permission access is common for apps that sync with an external platform and manage local data; users should review the privacy policy and permission usage to assess safety and privacy implications.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
