# Lịch vạn sự 2016 vs O2 Calendar

The clearest difference is update cadence: O2 Calendar at every 4 days against Lịch vạn sự 2016's fortnightly. Lịch vạn sự 2016's advantage is iOS requirement (7.0 vs 9.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Lịch vạn sự 2016 ships an update fortnightly, O2 Calendar every 4 days. The most recent releases landed on October 9, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Lịch vạn sự 2016 | O2 Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Monetization | — | Free |
| Size | 10 MB | 52 MB |
| Requires iOS | **7.0** | 9.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ePapersmart Team](https://appshunter.io/developer/527597628) | [O2 VN Tech.,JSC](https://appshunter.io/developer/1547745523) |

## What reviewers say

### Lịch vạn sự 2016

[App page](https://appshunter.io/ios/app/lich-van-su-2016/id1073883852)

**Features:** macOS Compatibility

**In-app purchases:** none


### O2 Calendar

[App page](https://appshunter.io/ios/app/o2-calendar/id1547745521)

Manage your schedule with this app, offering tools for events, appointments, notes, and daily tasks. Set custom reminders for your important activities and organize your day effectively.

**Highlights:** Event creation and management, Customizable event reminders, Daily task reminders, Note-taking functionality, Appointment scheduling

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lịch vạn sự 2016 free?

Lịch vạn sự 2016 is free to download, with no in-app purchases.

### Is O2 Calendar free?

O2 Calendar is free to download, with no in-app purchases.

### Do Lịch vạn sự 2016 or O2 Calendar have ads?

Neither Lịch vạn sự 2016 nor O2 Calendar shows ads.

### Which is updated more often, Lịch vạn sự 2016 or O2 Calendar?

Lịch vạn sự 2016 ships an update fortnightly, and O2 Calendar every 4 days. Most recently, Lịch vạn sự 2016 was updated on October 9, 2026 and O2 Calendar on September 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*