KooSync vs Grasfeel
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KooSync
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A revolutionary new way to interact with your devices, delivering the ultimate interactive experience. It bridges the gap between technology and privacy, allowing you to seamlessly control your devices and enjoy them. Features: Unified Control: Manage and control your devices with intuitive and easy-to-use settings. Separate Control: Flexible control over every aspect of your enjoyment. Full Access Control: Enable user permissions and customize time periods to meet diverse interaction needs. Secure and Private: Prioritize your privacy with secure connections and discreet app interactions. This app is the key to unlocking a new dimension of interaction. Step into the future of personal entertainment and bring your virtual experiences to life with this app.
Grasfeel
This application connects with purchased devices to offer users an exciting experience. It's designed for those who have acquired compatible hardware. Get ready to explore new possibilities with this innovative tool.
- Device linking
- Enhanced user experience
- Exciting new possibilities
- Compatible hardware integration
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The app is now live and linked with your device! We can’t wait for users with purchased devices to download and give it a try. Start your exciting experience today!
Screenshots
Verdict
KooSync and Grasfeel are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
KooSync ships an update every 3 weeks, Grasfeel monthly. Both last shipped on November 5, 2026.
| Parameter | KooSync | Grasfeel |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.7 (11 ratings) — better |
| Positive reviews | — | 62.5% of reviews |
| Number of ratings | — | 11 — better |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.0 | 15 — better |
| Further details — not scored | ||
| Size | 155 MB | 104 MB |
| Age rating | 17+ | 17+ |
| Developer | 宇森 吴 | 可贞 毛 |
In-app purchases
KooSync
No in-app purchases
Grasfeel
No in-app purchases
