Heartwitch vs Moblin
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Heartwitch
Stream your real-time heart rate from your Apple Watch to a web browser. Ideal for streamers who want to share their health stats during live broadcasts without extra hardware.
- Live stream heart rate data
- Uses Apple Watch sensors
- No extra hardware needed
- Sends data to web browser
- Independent watch app
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Show your heart rate as you live stream with this watch app! What is this exactly? Heartwitch is a combination Apple Watch and Web Application for sending your health data to a web browser window. Why would you want to send your health data to a web browser window? In the last few live years, live streams have become incredably popular and in many tense circumstances streamers want to share their health stats specifically their heart rate. For instance, speedrunners who wish to break records as to how quickly they can beat a game. With Heartwitch, there is no need for extra hardware. It simply uses the sensors on the Apple Watch to detect your heart rate and it sends it through our servers directly to your browsers. Do you save my health info? None of your health data is saved on our server. Every health stat is received by our servers from your Apple Watch and directly sent to the web browser. At no point is it saved on our end. Each workout is saved locally on your watch and stored on your devices along with your other workouts stored on your device but none of the health data is stored by us. How do I launch the app? I don't see an icon on my iPhone? Heartwitch is a completely independent watch app. Therefore there is no app for the iPhone and at this point there is no plan for one. How can I share my web browser window on a livestream? If you are using OBS to stream online, share your web browser window using the Window Capture Source. What makes this app so special? There's no need for additional hardware and using the Apple Watch health data is updated frequently.
Moblin
Stream live video from your phone to platforms like Twitch. Offers robust connection protocols, high-quality video up to 4K 60 FPS, and built-in chat for viewer interaction. Includes adaptive bitrate options and video stabilization for a smoother broadcast experience.
- Live streaming to Twitch and other platforms
- Built-in chat for viewer interaction
- Support for SRTLA, SRT, RIST, RTMP, RTMPS
- Up to 4K resolution and 60 FPS
- Adaptive bitrate streaming
- Video stabilization
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Stream live to Twitch and other streaming platforms directly from your phone! Main features: - Built-in chat to interact with your viewers - SRTLA, SRT, RIST, RTMP and RTMPS for flexible and reliable connections - Up to 4K, 60 FPS, H.265/HEVC - Optionally use adaptive bitrate for SRT, SRTLA, RIST and RTMP(S) - Video stabilization - And so much more! All features are free to use! Optionally buy cosmetics if you like the app and want to support the developers. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: Moblin at 91% against Heartwitch's 40%. Moblin also leads on rating (4.9 vs 2.6) and update cadence (weekly vs every 5 months). Heartwitch's advantage is in-app purchases (none vs 16) and iOS requirement (14.8 vs 16.4). On price, ads and device support 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
Both are free to download. Moblin sells 16 one-off in-app purchases. Heartwitch asks for nothing beyond the download.
Moblin holds the better App Store score, 4.9 against 2.6. That said, the two scores are not equally well evidenced: Moblin has 74 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 40% of Heartwitch's written reviews are positive against 91% of Moblin's.
Heartwitch ships an update every 5 months, Moblin weekly. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.
| Parameter | Heartwitch | Moblin |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (9 ratings) | 4.9 (74 ratings) — better |
| Positive reviews | 40.0% of reviews | 91.0% of reviews — better |
| Number of ratings | 9 | 74 — better |
| Update frequency | Every 5 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, Mac, Apple Watch — better |
| Requires iOS | 14.8 — better | 16.4 |
| Further details — not scored | ||
| Size | 15 MB | 67 MB |
| Age rating | 4+ | 17+ |
| Developer | BrightDigit | Erik Moqvist |
Customer experience
Heartwitch
Moblin
Bugs and requests
Heartwitch
Not enough reviews yet to summarise bugs or requests.
Moblin
Reported bugs
14 issues- Screen capture feature doesn’t work when leaving the app
- Back camera still not working
- Cannot add channel on iPhone 13 due to invisible buttons
- GoPro hero 13 not connecting, RTMP server location disappeared
- Not streaming on rtmp VK after update
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- RTMP stopped working after new update
- RTMP server on PC not working after update
- Screen capture does not record device audio natively
- Screen capture scene orientation remains fixed when device is rotated
- Cannot configure chat after deleting and reinstalling
- Browser widget for donation notifications not working
- DJI select device is broken, does not populate
- Occasional cuts or flickers during transmission
- Recordings are corrupted when the app loses focus
Requested features
16 requests- Allow manual resizing of widgets (donation, fundraising)
- Allow manual resizing of front camera widget
- Add ability to broadcast via SJCAM cameras
- Support NDI external feeds
- Add Moblink for iOS for bonding with older iPhones/iPads
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- Improve screen capture to record device audio natively
- Fix screen capture scene orientation when device is rotated
- Add scene for simultaneous front and back camera use
- Connect to Bit Speaker for TTS
- Add connection to OBS Linux
- Add support for OBS Studio on Linux
- Improve DJI camera selection/connection
- Add support for 60 FPS streaming
- Allow use of external speakers
- Add ability to broadcast via GoPro cameras
- Improve embedding of videos
In-app purchases
Heartwitch
No in-app purchases
Moblin
- Goblina$1.99
- Queen$1.99
- Peru$1.99
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- Goblin$1.99
- King$1.99
- Looking$1.99
- Heart$1.99
- Tetris$1.99
- Ireland$1.99
- Tub$1.99
- Pixels$1.99
- Pink$4.99
- Happy$4.99
- Millionaire$9.99
- Billionaire$49.99
- Trillionaire$199.99
