# 倒数纪念日 vs RegenOS

The clearest difference is iOS requirement: 倒数纪念日 at 10.0 against RegenOS's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

倒数纪念日 ships an update every 3 weeks, RegenOS fortnightly. The most recent releases landed on October 8, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 倒数纪念日 | RegenOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id1636119794/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Free | — |
| Size | 32 MB | 71 MB |
| Requires iOS | **10.0** | 17.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Shanghai Jiyou Network Technology Company Limited](https://appshunter.io/developer/1593657078) | [美蓝智达](https://appshunter.io/developer/1649076603) |

## What reviewers say

### 倒数纪念日

[App page](https://appshunter.io/ios/app/id1636119794)

This app helps you remember important dates and people, marking significant moments in your life. It precisely tracks time down to the second, reminding you to cherish the present and move forward with your initial intentions.

**Highlights:** Time tracking, Event reminders, Precise to the second, Cherish the present, Remember important people

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### RegenOS

[App page](https://appshunter.io/ios/app/regenos/id6462980290)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 倒数纪念日 free?

倒数纪念日 is free to download, with no in-app purchases.

### Is RegenOS free?

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

### Do 倒数纪念日 or RegenOS have ads?

Neither 倒数纪念日 nor RegenOS shows ads.

### Which is updated more often, 倒数纪念日 or RegenOS?

倒数纪念日 ships an update every 3 weeks, and RegenOS fortnightly. Most recently, 倒数纪念日 was updated on October 8, 2026 and RegenOS on October 24, 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.*