# KS OS — user reviews > 84 indexed App Store user reviews of KS OS by 上海凯斯领拓技术有限公司, rated 3.43/5 from 30 ratings. - Source: https://appshunter.io/ios/app/ks-os/id6451134361/reviews - App overview in markdown: https://appshunter.io/ios/app/ks-os/id6451134361.md - Rating breakdown: 5★ 14 · 4★ 2 · 3★ 3 · 2★ 5 · 1★ 6 ## Newest reviews (17 of 84) ### 4/5 — App nao atualizado *2026-07-18, version 2.4.5* O modelo s3 not o App nao conecta no strava , acredito que por conta da atualizacao do app ### 2/5 — Zalo *2026-06-14, version 2.4.5* Zalo có cuộc gọi ko hiện được tên ### 2/5 — Глючат *2026-06-10, version 2.4.5* Глючат то приходит уведомление, то нет . Перезапустить целая история. То сопряжение нет, то ещё не пойми что ### 3/5 — Khá *2026-05-09, version 2.4.5* Mọi thứ đều tốt, duy chỉ có không kết nối với strava được rất bất tiện ### 3/5 — ไม่เสถียร *2026-05-03, version 2.4.5* ตัวนาฬิกาหลุดจากการเชื่อมต่อมือถือบ่อยครั้ง มีการ reset time เป็นบางครั้ง นาฬิกาถือว่าชื่อถือได้น้อย ### 2/5 — المرجو التحديث *2026-05-01, version 2.4.5* المرجو التحديث ### 2/5 — Iraq/duhok *2026-03-05, version 2.4.5* The watch design is absolutely stunning! However, the watch face options are very limited. It would be great if you could add a dedicated store to buy or download more high-quality watch faces. Keep up the good work! ### 2/5 — Data Updates Problematic *2026-02-23, version 2.4.5* Issues with data uploads from watch plus of late it has deleted data on the watch ### 2/5 — Watch face *2026-02-09, version 2.4.5* More watch face please .. there’s alot but all of them aren’t good !! At least allow us to design it you need to improve the custom face with more tools ### 3/5 — แบตเตอรี่ *2026-02-06, version 2.4.5* แบตเสื่อมเร็วมากปีเดียวเห็นผล ### 2/5 — ในแอฟบางวันไม่บันทึก *2026-02-02, version 2.4.5* ปรับปรุงแอพการบันทึกบางวันไม่ซิงค์กับนาฬิกา ### 2/5 — Thông báo *2026-01-17, version 2.4.5* Đề nghị sửa lại thông báo ứng dụng , không có thống báo Facebook Messenger ### 3/5 — Đ.hồ kiesslect *2026-01-05, version 2.4.5* Sao áp của KS OS lại không có một mặt Đ Hồ nào chạy kim trôi. Mong nhà sáng chế cải thiện… ### 2/5 — OS ไม่แจ้งเตือน *2025-12-28, version 2.4.5* ไลน์เข้าไม่ดัง อีเมล์ไม่ดัง แต่แต่อัพเดทใหม่ ดูการเตือนเพี้ยน ### 3/5 — Poor Performance *2025-11-18, version 2.4.5* It is not working in iOS device. Even not receiving messages from Whatsapp. ### 2/5 — ข้อเสีย *2025-11-17, version 2.4.5* น่าจะรับสาย ไลน์ เฟสได้ ### 1/5 — Very bad *2025-10-22, version 2.4.5* It is Only a normal watch not smart at all ## Most critical reviews (10 lowest-rated) ### 1/5 — จบ *2026-05-24, version 2.4.5* ข้อมูลไม่ละเอียดพอทน ข้อมูลไม่ซิงค์กับแอปพอเลย เจอเหล่าอินฟลูนักรีวิวอวยเข้าไปก็หลงเชื่อซื้อมาใช้ ### 1/5 — Dở tệ *2026-05-13, version 2.4.5* App gì tải về xong đăng ký k đc.đăng nhập bằng ứng dụng khác r còn cần tài khoản.ngáo vl ### 1/5 — เพี้ยนจัด *2026-05-11, version 2.4.5* รีเซ็ทเองบ่อย แอพก็มึน ใช้ได้แป๊ปเดียวก็รวน นาฬิกนับก้าวได้100กว่าในแอปเดินเป็นแสนก้าว ### 1/5 — การแจ้งเตือน *2026-01-29, version 2.4.5* ไม่ได้เรื่อง !! ### 1/5 — Why *2026-01-09, version 2.4.5* Can’t connect my phone iOS whyyy? ### 1/5 — Tệ quá, không cập Nhật ứng dụng gì hết mọi thứ dở tệ *2025-12-17, version 2.4.5* Quá tệ. Quá tệ. Bỏ bê ứng dụng không cập Nhật ### 1/5 — العراق *2025-11-21, version 2.4.5* يرجى توفير خلفيلت جديده🥲 ### 1/5 — อัพเดทแล้ว *2025-11-20, version 2.4.5* อัพเดทแล้ว หน้าจอเก่าใช้ไม่ได้ ลบก็ไม่ได้เพิ่มใหม่ก็ไม่ได้ แอฟรวนบ่อยมาก เครื่องปิดเปิดเองบ่อยจนพัง ### 1/5 — Synchronization issue between Wactch and App *2025-11-12, version 2.4.5* currently experiencing issues related to the operation and synchronization between the device and the app, as follows: When I start an indoor run using the Quick Button on the watch, the activity is recorded on the watch, but the KSOS app does not show any activity data. I have tried multiple workout types and the issue remains. Even when I run for approximately one hour, the watch only records a few minutes of activity time. The watch shows activity data, but the application does not display any information. I must restart the watch in order for synchronization to occur, but even after restarting, the data still does not sync properly. Troubleshooting steps I have already performed: Reset to factory settings and reconfigured the device Repaired and reconnected the watch to the application Switched to a different KS3 watch Updated both the app and the watch to the latest available version Could you please advise on further steps to resolve this issue? ### 1/5 — น *2025-11-10, version 2.4.5* อยู่ดีๆก็รีเซ็ดตัวเอง บันทึกการออกกำลังกายก็ไม่ได้ ## Most praised reviews (10 highest-rated) ### 5/5 — Como faço para colocar minha foto no relogio? *2026-04-14, version 2.4.5* Foto papel de parede ### 5/5 — 1 *2026-04-02, version 2.4.5* Cần thêm nhiều mặt đồng hồ hơn .hoặc học hỏi các bên khác ### 5/5 — Ótimo app *2026-02-03, version 2.4.5* Aplicativo completo e sem bugs, única coisa que não achei é a compatibilidade com o Strava ### 5/5 — อยากให้มี away on display ให้เลือกเยอะๆมากว่านี้ *2025-06-09, version 2.4.4* Away on display น้อยเกินไป ### 5/5 — Pratico *2025-05-07, version 2.4.4* Muito bom ### 5/5 — อัพเดทแล้ววไม่แจ้งเตือน *2025-03-18, version 2.4.4* ช่วยแนะนำหมีครับอัพเดทแล้ววไม่แจ้งงเตือนเลย ### 5/5 — Watch face improvement *2025-01-30, version 2.4.4* 1. Please make a analog hand clock for photo. 2. Make some simple but aesthetic faces. ### 5/5 — Easy use *2024-09-14, version 2.3.7* Easy use like it very much ### 5/5 — Anh Tran *2024-07-24, version 2.3.0* Hãng có lắng nghe người dùng, dần dần cải thiện để mang tới trải nghiệm tốt hơn ### 5/5 — Great inexpensive smart watch *2023-10-28, version 2.0.3* I loved this watch. It is very useful , easy to use and great quality!!! I mostly use it at the gym and I love it. I’m going to order another one for my Dad. Thank you so much ! --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-30.*