# Intervals.icu Companion — 3rd-Party Intervals.icu App > Companion app for Intervals.icu, displaying fitness, fatigue, and form with widgets and watch faces. (iPhone/iPad app by McEwen Labs LLC.) - Source: https://appshunter.io/ios/app/intervalsicu-companion/id6739638454 (this page in markdown: same URL + `.md`) - Developer: [McEwen Labs LLC](https://appshunter.io/developer/1786409246) - Category: Health & Fitness, Sports - Price: Free with in-app purchases - Rating: 4.80/5 from 31 App Store ratings · 15 written reviews indexed - Age rating: 4+ - Requires: iOS 18.6 · 56 MB - Languages: American English, Danish, Dutch, French (France), German (Germany), Italian, Japanese, European Portuguese, Chinese (Simplified, China), European Spanish - Released: 2025-02-01 - Data updated: 2026-09-04 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/intervalsicu-companion/id6739638454/reviews.md ## What is Intervals.icu Companion? Intervals Companion is a powerful third-party companion app for Intervals.icu, bringing your training data to iOS, watchOS, and macOS with beautiful widgets, deep Apple Health integration, and advanced analytics. Two-Way Apple Health Sync Automatically sync workouts recorded on Apple Watch or iPhone to Intervals.icu, and push Intervals.icu activities back to Apple Health to close your Activity Rings. Sync daily health metrics like HRV, sleep scores, and readiness scores between Apple Health and Intervals.icu, keeping all your data in one place. Apple Watch Workout Sync Convert planned workouts from your Intervals.icu calendar and send them directly to Apple Watch so your structured sessions are ready to go when you are. FIT File Import Manually import FIT files to Intervals.icu and/or Apple Health. Bring in workouts from any device or platform with a few taps. Metrics & Custom Charts Build personalized charts and widgets across all fitness and health metric fields. Visualize the data that matters most to you, your way. Library Browse your Intervals.icu workout library and add workouts directly to your training calendar from your phone. Training Analytics - Interactive Fitness, Fatigue & Form graph with drag-to-inspect for past activities and planned workouts - Predict future form based on your scheduled training load - Vitals tracking: HRV, readiness & sleep scores, resting and sleeping heart rates - Distance splits and pace zone charts on activity detail screens Chat & Community - Send and receive private messages with coaches and athletes directly from your phone - View and post comments on activities to stay connected with your training community - Push notification alerts for new messages and activity comments Widgets & Watch - Home screen widgets for iOS, iPadOS, and macOS - Apple Watch app and watch face complications - Sports Summary widget: weekly goal rings for distance and time with customizable colors - Silent push notifications trigger automatic updates when new activities or wellness data arrive on Intervals.icu Intervals Companion is an independent hobby project, not affiliated with or endorsed by Intervals.icu. Fitness metrics and scores are for informational purposes only — not a substitute for professional medical or coaching advice. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ## Key features - Interactive Fitness, Fatigue & Form Graph - Apple Watch App for data viewing - Multi-Platform Widgets (iOS, iPadOS, watchOS, macOS) - Vitals Tracking (HRV, readiness, sleep) - Automatic Data Updates via notifications - Sports Summary Widget for goal tracking - Customizable Data Settings ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Yearly Supporter | $9.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Support Tip | $19.99 | one-time | | Tip | $19.99 | one-time | | Tip | $9.99 | one-time | ## Recent user reviews (10 of 15) All indexed reviews: https://appshunter.io/ios/app/intervalsicu-companion/id6739638454/reviews.md ### 5/5 — So Slick *2026-08-13* I can’t believe how elegant this app is for a free, 3rd party app. Absolutely love this for mobile use. ### 5/5 — A friendly request *2026-07-17* I have been using this app for a week now and I absolutely love it. This app gives you detailed information about your workouts and offers comprehensive analysis of your performance. So far there is one issue that bothers me. I currently live in China, the Chinese government requires all domestic mapping services to use a coordinate system called GCJ-02, which differs from WGS-84. This results in a fixed offset of workout routes displayed in the app. I wonder if you could look into it and come up with a transformation of the two coordinate systems, so that I can see my workout route clean and neat. Much appreciated. **Developer response:** Thank you for letting me know about this. I'll look into it and see if I can get a fix into the 3.3 release. ### 5/5 — Flawless Integration with Apple Health *2026-04-20* I use an Apple Watch and had been recording most of my workouts natively on the Workout app along with the Apple Health app. As I started to get a bit more serious with my training I decided I wanted more stats and load estimations to better guide my training and that’s when I created an Intervals.ICU account. Well, this app made the exporting of my data to Intervals.ICU seamless. Love the app, totally recommend! ### 1/5 — Tip jar spam *2026-03-23* Having to dismiss the tip jar pop up constantly made me uninstall the app. **Developer response:** That's not true. Just tap close and you will never see it again. ### 5/5 — Freaking Awesome! *2026-02-09* Yep ### 5/5 — You need this if you Zwift *2026-01-16* This app is amazing if you use Zwift and have an Apple Watch. It provides all the data you could ever need in an easy to use format and uploads it to Apple Workouts. It gives me all the data my Apple Watch cannot provide. ### 5/5 — All the stars *2025-11-17* Amazing app. If you use Intervals.icu then this is the app you need ### 5/5 — Incredible App *2025-06-17* Wow, this is an amazing app. Much better interface than the official website. Ps, I also ride the PMC! For almost 20 years. ### 5/5 — Amazing *2025-05-23, version 1.5* Fire ### 5/5 — goated app *2025-04-08* Honestly everything I was looking for in terms of an iphone app for this niche, just an extra bonus in that it actually has widgets and apple specific stuff that’s useful. ## Frequently asked questions about Intervals.icu Companion ### What is the main purpose of Intervals Companion? Intervals Companion is designed to provide quick access to your fitness, fatigue, and form data from Intervals.icu through configurable widgets and Apple Watch faces. It complements the main Intervals.icu website by offering at-a-glance insights and automatic background updates. ### Can Intervals Companion replace the Intervals.icu website? No, Intervals Companion is explicitly a third-party companion app and not a full replacement for the https://intervals.icu website. It focuses on delivering key data through widgets and watch faces for convenience. ### How does Intervals Companion update data automatically? Automatic data updates are enabled by silent push notifications that trigger when new activities or wellness data are uploaded to Intervals.icu. Ensure Background App Refresh and Notifications are turned on in your device settings for this feature. ### What types of vitals can I track with Intervals Companion? Intervals Companion offers graphs for tracking various vitals, including Heart Rate Variability (HRV), readiness scores, sleep scores, and resting/sleeping heart rates, providing a comprehensive view of your physiological state. ### On which devices is Intervals Companion available? Intervals Companion is available for a range of Apple devices, including iPhone, iPad, Apple Watch, and Mac, allowing you to monitor your fitness data across your ecosystem. ### How often is Intervals Companion updated? The app was last updated on March 4, 2026, with version 2.1.1. This indicates a commitment to ongoing development and feature enhancements. ### What is the user sentiment for Intervals Companion? Users have given Intervals Companion a perfect 5.0-star rating from 21 reviews, suggesting a very positive reception and high satisfaction with its functionality and performance. ### Is Intervals Companion free to use? Yes, Intervals Companion is available for free. Despite offering advanced features and integrations, there is no cost to download or use the core functionalities of the app. ## Version history (last 5 releases) ### 3.4 — 2026-09-03 Apple Health & Sync - Two-way RPE/Effort score sync. Set the RPE of an activity in the app, or the Effort Score in Apple Health, and the other side updates. - Calories in activities synced to Apple Fitness now take stopped and paused time into account, so they are more accurate. - Multisport Apple workouts sync to intervals.icu as one activity per sport. - Activities imported to intervals.icu from Dropbox can now sync to Apple Health. - Activities synced from intervals.icu to Apple Health carry more metadata, like the original activity name and METs. - Bug fixes to the total steps calculation, FIT file parsing, and HealthKit access. Activity Details - Export an activity as a PDF, with an optional paged layout. - Activity details open faster, especially when you come back to the app with an activity already open. - Choose which buttons show in the toolbar. - Maps show route direction arrows and distance markers in miles or kilometers. Workouts - Swipe a workout in the library to add it to your calendar. - Workouts added from the library become all-day events by default, or pick a specific start time. - "Press lap" steps now sync to Apple Watch as an open step with a description. - File attachments show in the library, in workouts, and on linked activities. Widgets - The fitness meter widget has a new design with five styles, and a new form bar widget joins the same set. Press and hold the widget to edit it and switch styles. - The today's workout widget also shows your next workout when it is within a week. Everywhere Else - Readiness and sleep scores use updated logic. Longer-term HRV counts for more, and the deep sleep target takes age into account. - Improvements to the metrics editing sheet. - Enter your intervals.icu API key manually in Settings when the app cannot look it up for you. - VoiceOver improvements across the calendar, workout charts, and button labels. - The calendar's today marker updates automatically when the day changes. - Chats and file attachments open in the standard iOS viewer. ### 3.3.1 — 2026-08-11 Planned workouts hidden by your coach on intervals.icu no longer appear in the app. ### 3.3 — 2026-08-03 Calendar - A full calendar view by month. Browse by week, swipe between weeks, and pull to refresh. - Day heatmap with your choice of metric and color scheme - Create, view, edit, and delete notes and events. - See races and their details (added from the intervals.icu website) New Charts & Metrics - Estimated VO2 Max as a metrics chart - HRV Trend on the Metrics screen, with a compact display option - Ground contact time and vertical oscillation on activity details (enable the custom streams on the website and reprocess the activity) - Alcohol, caffeine, and wellness minutes charts sourced from Apple Health Shortcuts & Apple Health - New Shortcut to sync all daily metrics at once, alongside the individual fields - Shortcuts can now write data to Apple Health - More reliable workout syncing to Apple Health, with clearer notifications when it runs in the background Apple Watch & Workout Sync - Choose average or current speed/power for workout alerts - Fixed distance-based goals for swim workouts - Better handling of open water swims Everywhere Else - Screen settings moved into the toolbar on Fitness, Activities, Workouts, and more - Refreshed activity summary rows to match the new calendar styling (can be turned off) - Improved FIT file export: sport mappings, lap creation, timestamps, and heart rate data - New flow for marking a workout as done: link it to an existing activity or create a new one - Uncategorized sleep now counts toward total sleep duration - Numerous crash fixes and stability improvements throughout the app ### 3.2.3 — 2026-06-16 - Bug fixes to chat data load, athlete lookup, and feed display. ### 3.2.2 — 2026-06-12 - Updated FIT file lap detection logic from structured workouts and manually created Apple Watch segments - Updated Apple Watch workout step display labels ## Apps similar to Intervals.icu Companion | App | Rating | Price | Category | | --- | --- | --- | --- | | [ErgData](https://appshunter.io/ios/app/ergdata/id561716382) | 4.7 (4,771) | Free | Health & Fitness | | [Cadence: Bike & Run Tracker](https://appshunter.io/ios/app/cadence-bike-and-run-tracker/id1490975634) | 4.8 (1,543) | Free | Health & Fitness | | [ConnectStats -](https://appshunter.io/ios/app/connectstats/id581697248) | 4.7 (393) | Free | Health & Fitness | | [RowingCoach](https://appshunter.io/ios/app/rowingcoach/id1202290980) | 3.3 (117) | Free | Health & Fitness | | [Garmin Connect™](https://appshunter.io/ios/app/garmin-connect/id583446403) | 4.4 (58,232) | Free | Health & Fitness | | [Training Today](https://appshunter.io/ios/app/training-today/id1507992127) | 4.6 (2,614) | Free | Health & Fitness | ## Related topics [intervals icu](https://appshunter.io/ios/topics/intervals-icu) · [intervals.icu companion](https://appshunter.io/ios/topics/intervals-icu-companion) · [icu cheer](https://appshunter.io/ios/topics/icu-cheer) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-04.*