# 1DayS vs 数数日子

The clearest difference is update cadence: 数数日子 at daily against 1DayS's every 3 weeks. 1DayS's advantage is iOS requirement (12.0 vs 15.6). 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.

1DayS ships an update every 3 weeks, 数数日子 daily. The most recent releases landed on October 19, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 1DayS | 数数日子 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/1days/id1668529103/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free | — |
| Size | 102 MB | 3 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [KAIROS Company Limited](https://appshunter.io/developer/1495144014) | [莹 李](https://appshunter.io/developer/1803006031) |

## What reviewers say

### 1DayS

[App page](https://appshunter.io/ios/app/1days/id1668529103)

This app helps you track and remember important dates like birthdays, anniversaries, holidays, and deadlines. It offers customizable widgets, cloud synchronization, and a choice of UI themes. Never miss a significant event again with precise reminders.

**Highlights:** Track birthdays, anniversaries, holidays, deadlines, Public and lunar calendar support, Customizable widgets, Cloud synchronization, Multiple background options, One-click public holiday addition, Light and dark UI themes

**Features:** macOS Compatibility

**In-app purchases:** none


### 数数日子

[App page](https://appshunter.io/ios/app/id6744024477)

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

**In-app purchases:** none


## Frequently asked questions

### Is 1DayS free?

1DayS is free to download, with no in-app purchases.

### Is 数数日子 free?

数数日子 is free to download, with no in-app purchases.

### Do 1DayS or 数数日子 have ads?

Neither 1DayS nor 数数日子 shows ads.

### Which is updated more often, 1DayS or 数数日子?

1DayS ships an update every 3 weeks, and 数数日子 daily. Most recently, 1DayS was updated on October 19, 2026 and 数数日子 on October 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.*