KnitWarm vs Fy Ring
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KnitWarm
Control smart textile accessories wirelessly via Bluetooth. Monitor and adjust up to six devices simultaneously for comfort, relaxation, and thermal therapy. Experience a blend of modern technology and stylish design.
- Wireless Bluetooth control
- Real-time monitoring
- Control up to six devices
- Thermal therapy features
- Lifestyle and fashion accessories
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KnitWarm is an award-winning Hong Kong-based brand redefining modern living through its patented smart textile technology. By seamlessly merging cutting-edge thermal innovation with sleek design, KnitWarm creates versatile lifestyle and fashion accessories that are comfortable, soft, and breathable, delivering both style and functionality. Our product range caters to various needs, including travel essentials, pre-exercise warm-ups, and thermal therapy for relaxation. The KnitWarm App enhances the experience by connecting wirelessly via Bluetooth Low Energy, allowing real-time monitoring and control of up to six KnitWarm products simultaneously.
Fy Ring
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◆ A simple and enjoyable application that records daily health data for visual understanding. Utilizing wearable smart rings, it enables effective health management. ◆ The app aims to visualize daily activities and health conditions, encouraging behavioral changes. Manage your daily lifestyle numerically, whether increasing step counts or pursuing better sleep, for a disciplined life and a healthier body. ◆ Key Features: ・Sleep (Duration/Depth) ・Stress ・Heart Rate Variability ・Step/Calories/Distance ・Heart Rate Through this app, gain a deeper understanding of your health and embark on a positive lifestyle transformation. ※ It is important to note that this app is not intended to be a medical device, and the data provided by this app is for general health and wellness purposes only. The app's information is not a substitute for professional medical advice, diagnosis, or treatment.
Screenshots
Verdict
The clearest difference is update cadence: Fy Ring at fortnightly against KnitWarm's every 6 months. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
KnitWarm ships an update every 6 months, Fy Ring fortnightly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | KnitWarm | Fy Ring |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.6 |
| Further details — not scored | ||
| Size | 21 MB | 77 MB |
| Age rating | 4+ | 4+ |
| Developer | ev-sparkle | MedVigilance Inc. |
In-app purchases
KnitWarm
No in-app purchases
Fy Ring
No in-app purchases









