Cardio Chart vs Stromno
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cardio Chart
Visualize your heart rate during workouts with detailed graphs. Track maximum and average heart rates to understand exercise impact. Requires heart rate data recorded to the Health app.
- Heart rate workout graphs
- Maximum heart rate display
- Average heart rate display
- Health app integration
- Workout data visualization
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Cardio Chart lets you view a graph of your heart rate from any workout recorded on your device. See any peaks in your heart rate and get a sense of how your exercise is affecting your heart. Cardio Chart also displays your maximum and average heart rates for a workout. Graphs are only shown for workouts that include heart rate data such as those recorded with an Apple Watch or other pulse monitoring accessory. Note: • In order to display heart rate charts, you must have a device capable of recording heart rate data to the Health app (like an Apple Watch or other accessory). • Cardio Chart integrates with the Health app on your iPhone to retrieve the data it displays. It can display your Workout and Heart Rate information.
Stromno
Broadcast your real-time heart rate from your Apple Watch to live streams on platforms like Twitch and YouTube. Easily set up a customizable widget or overlay for your stream with a simple login code.
- Heart rate streaming from Apple Watch
- Live stream integration (Twitch, YouTube)
- Customizable widget/overlay designs
- Easy 1-minute setup
- OBS, Twitch Studio, XSplit, Streamlabs OBS compatible
- Integrates with Apple Health
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Stromno app allows you easily broadcast your heart rate data from Apple Watch and show it on live stream. Login with a short code and BPM value will be shown in your personal widget/overlay. Stromno was created for live streamers to show real-time heart rate on Twitch, YouTube. It is easy to set up Stromno heart rate widget in 1 minute. You can customize the widget and get a unique URL for OBS(Twitch Studio, XSplit, Streamlabs OBS) on the website. Multiple designs available to fit your stream layout. The App integrates with Apple Health app. Visit stromno.com to create an account, get login code, design your widget/overlay. How to use: - get the Apple Watch app - create an account on stromno.com - get a short login code on the site Dashboard - open the Watch app, login, start streaming - change the widget on the website - copy your heart rate widget URL and use it as a Browser source (in OBS, Twitch Studio, XSplit, Streamlabs OBS) - enjoy more fun and interactivity on your live stream on Twitch or YouTube
Screenshots
Verdict
The clearest difference is price: Cardio Chart at Free against Stromno's $4.99. Cardio Chart also leads on rating (5.0 vs 3.1). Stromno's advantage is update cadence (every 3 months vs every 25 months) and ratings volume (24 vs 1). On ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Cardio Chart is free to download; Stromno costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Cardio Chart holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: Stromno has 24 ratings behind it against 1, so its average is the more settled of the two.
Cardio Chart ships an update every 25 months, Stromno every 3 months. The most recent releases landed on July 4, 2026 and September 23, 2026 respectively.
| Parameter | Cardio Chart | Stromno |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 5.0 (1 ratings) — better | 3.1 (24 ratings) |
| Positive reviews | — | 57.1% of reviews |
| Number of ratings | 1 | 24 — better |
| Update frequency | Every 25 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPod, Apple Watch — better |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 0 MB | 1 MB |
| Age rating | 12+ | 4+ |
| Developer | Clever Armadillo LLC | Yaroslav Hryniuk |
Customer experience
Cardio Chart
Stromno
In-app purchases
Cardio Chart
No in-app purchases
Stromno
No in-app purchases
Questions
Is Cardio Chart free?
Is Stromno free?
Which has better reviews, Cardio Chart or Stromno?
Do Cardio Chart or Stromno have ads?
Which is updated more often, Cardio Chart or Stromno?
Other comparisons
