DDLock vs Kstert
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DDLock
Unlock your doors using your smartphone, eliminating the need for physical keys. This app offers a more convenient and modern way to manage access to your locks.
- Unlock with smartphone
- Eliminates physical keys
- Convenient lock access
- Modern security solution
Read full descriptionHide full description
Using the mobile phone to unlock the lock reduces the inconvenience of the user passing the entity key, and makes the lock more and more convenient to use
Kstert
Control Bluetooth devices and connect with friends through integrated social features. Discover new and exciting ways to interact with your devices and community.
- Bluetooth device control
- Integrated social features
- Discover new gameplay
- Connect with friends
Read full descriptionHide full description
蓝牙设备操控工具的基础上，集成好友社交，更多新奇玩法等待您的发现！
Screenshots
Verdict
The clearest difference is update cadence: Kstert at every 3 weeks against DDLock's every 4 months. Kstert also leads on review sentiment (37% vs 20%). On price, rating, ratings volume and ads 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.
On the App Store both sit at effectively the same score — 2.9 for DDLock against 2.9 for Kstert. Both are backed by a comparable volume of ratings — 99 and 36 respectively. Written reviews are what separate them: 20% of DDLock's written reviews are positive against 37% of Kstert's.
DDLock ships an update every 4 months, Kstert every 3 weeks. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.
| Parameter | DDLock | Kstert |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (99 ratings) — better | 2.9 (36 ratings) |
| Positive reviews | 20.0% of reviews | 36.8% of reviews — better |
| Number of ratings | 99 — better | 36 |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 407 MB | 105 MB |
| Age rating | 4+ | 17+ |
| Developer | Shenzhen Kaadas Intelligent Technology Co.,Ltd | Shenzhen Aierweile Electronics Co., Ltd |
Customer experience
DDLock
Kstert
In-app purchases
DDLock
No in-app purchases
Kstert
No in-app purchases
