Open vs Sick Watch
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Open
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Open-OH: supporting you on your journey with Long Covid, Fibromyalgia, ME/CFS and more. Track your symptoms, and engage with resources to help you increase your functional capacity and make informed decisions about your condition and occupation DIARIES Track your activity levels, sleep, meals, symptoms and more ASSESSMENTS Access industry standard, condition specific Patient Reported Outcome Measures (PROMs) RESOURCES Receive personalised suggestions to access lots of support resources to educate and guide you on your journey with your long term conditions. Including symptoms specific resources, financial guides, and advice for your manager or employer. FIND SUPPORT Find local services to support your journey
Sick Watch
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Know you're getting sick before you feel it. Sick Watch monitors your overnight health signals โ heart rate, HRV, temperature, and breathing โ to spot the patterns that appear 1-3 days before illness symptoms. Based on research from Stanford and UCSF involving 63,000 participants, multi-signal detection can identify illness brewing with 82% accuracy, nearly 3 days before you'd normally notice. How it works: - Wear your Apple Watch to sleep - If you have existing sleep data, predictions start immediately - New watch owners get early predictions after 7 nights, full confidence at 14 - Get alerted when signals suggest your body is fighting something - Take action early โ rest up, clear your schedule, boost your defences Features: - Four-signal monitoring (temperature, HRV, heart rate, respiratory rate) - Personal baseline (not population averages) - Automatic alerts when something's brewing - No iPhone required โ runs entirely on Apple Watch - Privacy-first โ all data stays on your device Requirements: - Apple Watch Series 4 or later - watchOS 10 or later - Series 8+ recommended for temperature monitoring One-time purchase. No subscription. No ads. NOTE: Sick Watch is not a medical device and does not provide medical diagnoses. It is intended for general wellness purposes only. Always consult a doctor before making any medical decisions.
Screenshots
Verdict
The clearest difference is update cadence: Sick Watch at every 4 days against Open's every 2 weeks. Sick Watch also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Open ships an update every 2 weeks, Sick Watch every 4 days. The most recent releases landed on October 27, 2026 and October 2, 2026 respectively.
| Parameter | Open | Sick Watch |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Every 4 days โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPod, Apple Watch |
| Requires iOS | 15.0 | 13.0 โ better |
| Further details โ not scored | ||
| Size | 30 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Elaros | Edward Scotcher |
In-app purchases
Open
No in-app purchases
Sick Watch
No in-app purchases









