# Helium: Endurance trainer — For runners of all levels > Personalized endurance training plans and real-time pacing for runners. (iPhone/iPad app by Helium LLC.) - Source: https://appshunter.io/ios/app/helium-endurance-trainer/id1191326010 (this page in markdown: same URL + `.md`) - Developer: [Helium LLC](https://appshunter.io/developer/1191326009) - Category: Health & Fitness, Sports - Price: Free with in-app purchases - Rating: 4.60/5 from 83 App Store ratings · 21 written reviews indexed - Age rating: 4+ - Requires: iOS 14.0 · 27 MB - Languages: American English - Released: 2017-03-17 - Data updated: 2026-06-10 - Monetization: subscription - User reviews in markdown: https://appshunter.io/ios/app/helium-endurance-trainer/id1191326010/reviews.md ## What is Helium? Endurance training for runners of all levels. From Couch-5K to advanced marathoner, Helium has all the tools you need to get fit faster by training smarter. Unlike other basic run trackers, Helium was built from the ground up to make endurance training easy and fun at every point in the training lifecycle - from planning to execution to analysis. Helium automatically learns each runner's individual Effort Zones and matches them to a training plan appropriate for their fitness level. Plans such as couch to 3k, 10k, half-marathon, and more are available directly in the app. Workouts are then scheduled according to each user’s personal calendar for maximum accountability. Helium's Ambient Pacing Assistant on Apple Watch makes it easy to execute even the most complex interval workouts without distracting the runner's focus. The Assistant’s customizable visual, haptic, and audio feedback from Apple Watch helps runners stay in the appropriate Effort Zones prescribed by their training plan. After a workout, Helium's metrics dashboard makes it easy to see fitness progress with Cardio Efficiency and Strain measurements. Runners can watch as their cardiovascular endurance improves steadily over time, thanks to the proven effectiveness of zone-based interval training. Helium takes the guesswork and pain out of endurance training and makes running fun again. Run smarter with Helium. Helium integrates with the Health app to analyze your past workouts and save new workouts. Helium is available in the App Store and is $59.99/year with a 14-day free trial. https://www.helium.fit/terms https://www.helium.fit/privacy ## Key features - Personalized training plans - Automatic effort zone learning - Workout scheduling - Ambient pacing assistant - Cardio efficiency metrics - Strain measurements - Health app integration ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Helium - Full access | $59.99 | per year | ## Recent user reviews (10 of 21) All indexed reviews: https://appshunter.io/ios/app/helium-endurance-trainer/id1191326010/reviews.md ### 3/5 — Nice interface; phone tethered *2022-01-08, version 2021.07.01* This app has a nice interface, perhaps the nicest of all the similar apps I’ve tried. Unfortunately, though, it depends more than most on a phone connection, which caused me to lose data a few times. **Developer response:** Hi thanks for writing a review! Helium definitely supports executing workouts without your phone! That was one of my main design goals. Sorry to hear about your data loss. Please reach out to support@helium.fit and let me know the details! ### 5/5 — Super clean, simple and easy to use *2022-01-05, version 2021.07.01* Encountered several bugs which I reported to Mike, the developer, who graciously guided me every step of the way to stamp them out. Most responsive and responsible developer I’ve interacted with in a while. Well-worth the subscription if you are seeking an endurance-focused running app that offers customizable intervals. ### 5/5 — Intuitive, smart, motivating *2022-01-03, version 2021.07.01* I've been using the Helium app for about 5 weeks and am a big fan. I've been running for years now but have not found an easily accessible and fun way to truly measure and improve my performance. The Helium app is already showing results for me. I like the approach of having different plans based on different goals and then having a schedule that motivates me to go out and improve. I love the fact that this app comes from a single developer who did the research and whose app beats the socks off of apps from huge corporations. **Developer response:** 😍 thanks so much for writing a review! Don't hesitate to reach out with any feedback or suggestions. I love hearing from folks using the app! ### 1/5 — Not free *2021-10-18, version 2021.07.01* Stupid app is not free. Never said anything about a trial until installed. Deleted. ### 1/5 — Don’t bother unless willing to pay for unknown *2021-10-09, version 2021.07.01* App immediately tries to initiate trial with no ability to see interface before committing. Analyses workouts and sets zones set for American miles and not kilometers with no indication one can set to proper standard. Deleted. **Developer response:** Hi there. Thank you for your feedback. I’m so sorry to hear you didn’t find my app useful! Distance units can be changed to Kilometers in the Profile tab. I’ve tried to make it easy to test the app before purchasing: The two-week trial unlocks all features to give you a chance to see if it’s right for you. You can cancel anytime during the trial to avoid being charged for the subscription. You’ll even get an email reminder right before the trial ends in case you forget. ✌️ ### 2/5 — Frustrating User Interface *2021-03-17, version 2021.03* So far, the app doesn’t seem to do much of anything, based on the UI. It would be nice if there was a tutorial or instructions included in the app. I want to like it and am going to give it a chance during the 2-week trial but I’m not impressed so far. Will update if my opinion changes. ### 5/5 — Can’t wait to get started! *2021-03-12, version 2021.03* It’s been a while since I ran 23 miles but Helium really makes it easy to get back on track ### 5/5 — Perfect for any runner! *2021-03-12, version 2021.03* I love how this app is SO versatile and ALL-INCLUSIVE. It has so many features but the part I love the most is the built in training programs with metrics that connect to my Apple Watch. I consider myself a beginner runner and I’m so excited to grow with the help of Helium. ### 5/5 — Very useful *2021-03-11, version 2021.03* Great app to help manage and get the best out of my runs. ### 5/5 — The best design *2021-03-11, version 2021.03* This is the best designed fitness app I have seen. I love the live graphs and video on the phone, and the Apple Watch integration and app are awesome. ## Frequently asked questions about Helium ### What does Helium: Endurance trainer do? Helium provides personalized endurance training plans for runners of all levels. It learns your individual effort zones, matches them to appropriate training plans (like Couch to 5K, 10K, or half-marathon), and schedules workouts according to your calendar. The app also offers real-time pacing guidance and analyzes your progress with metrics like Cardio Efficiency and Strain. ### What are the key features of Helium? Key features include personalized training plans that adapt to your fitness level, automatic learning of your effort zones, workout scheduling integrated with your personal calendar, an Ambient Pacing Assistant for real-time guidance during workouts, and a metrics dashboard to track your progress with Cardio Efficiency and Strain measurements. ### How much does Helium cost? Helium is available via a subscription model at $59.99 per year. A 14-day free trial is offered, allowing you to experience the app's features before committing to a purchase. ### What devices is Helium compatible with? Helium is available in the App Store, indicating compatibility with Apple devices. It specifically mentions integration with Apple Watch for its Ambient Pacing Assistant and the Health app for analyzing past workouts and saving new ones. ### Who would benefit from using Helium? Runners of all experience levels would benefit from Helium. Whether you're just starting out and aiming to run your first 5K, or an experienced marathoner looking to optimize your training, the app's personalized plans and smart features can help you train smarter, improve endurance, and make running more enjoyable. ## Version history (last 5 releases) ### 2022.12.01 — 2022-12-02 Changes to subscription paywall messaging ### 2022.02.01 — 2022-02-22 • Fixes an issue that would sometimes cause incorrect distance display of metric units on a workout • Fixes calendar start day for non-US regions • Improves reliability of iPhone - Apple Watch communication ### 2021.07.01 — 2021-09-20 This app has been updated by Apple to display the Apple Watch app icon. • Always-on display on watchOS 8 and supported models • Support for iOS 15 ### 2021.05.01 — 2021-05-25 NEW: iOS home screen widgets NEW: watchOS complications See details about your upcoming or past workouts at a glance with these new widgets and complications. ### 2021.03.02 — 2021-03-17 Welcome to Helium! Helium is an intelligent endurance training app for Apple Watch and iOS. A comprehensive training tool for athletes of all skill levels - from beginners to advanced runners alike. New in this update: • Added explanation description for Cardio Efficiency metrics • Fixed: metric system distance displayed incorrectly in some cases • Fixed: non-US region weekly calendar days incorrectly aligned ## Apps similar to Helium | App | Rating | Price | Category | | --- | --- | --- | --- | | [HealthFit](https://appshunter.io/ios/app/healthfit/id1202650514) | 4.3 (32) | $6.99 | Health & Fitness | | [iSmoothRun](https://appshunter.io/ios/app/ismoothrun/id410965399) | 4.4 (934) | $4.99 | Health & Fitness | | [The Run Experience](https://appshunter.io/ios/app/the-run-experience/id1189131975) | 4.8 (538) | Free | Health & Fitness | | [Marathon 26.2 Trainer by C25K®](https://appshunter.io/ios/app/marathon-262-trainer-by-c25k/id514662686) | 4.7 (1,635) | Free | Health & Fitness | | [Paddle Logger: SUP & Kayaking](https://appshunter.io/ios/app/paddle-logger-sup-and-kayaking/id955311911) | 4.7 (6,130) | Free | Health & Fitness | | [Any Distance Running Tracker](https://appshunter.io/ios/app/any-distance-running-tracker/id1545233932) | 4.7 (2,419) | Free | Health & Fitness | --- *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 2026-06-10.*