# O2 Calendar — user reviews

> 2 indexed App Store user reviews of O2 Calendar by O2 VN Tech.,JSC.

- Source: https://appshunter.io/ios/app/o2-calendar/id1547745521/reviews
- App overview in markdown: https://appshunter.io/ios/app/o2-calendar/id1547745521.md

## Most critical reviews (2 lowest-rated)

### 1/5 — Không cho đăng ký để vào app

*2022-10-01, version 1.0.36*

Không cho đăng ký để vào app

### 4/5 — Khá tốt vẫn có thể cải thiện hơn

*2021-01-20, version 1.0.1*

Lịch dùng khá tốt nhưng vẫn có nhiều điểm có thể cải tiến, 4 sao

---

*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 2026-07-22.*