# 倒数 · 纪念日 vs HiDays

The clearest difference is ads: HiDays at none against 倒数 · 纪念日's shown. HiDays also leads on update cadence (every 8 days vs every 3 weeks). 倒数 · 纪念日's advantage is iOS requirement (10.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. 倒数 · 纪念日 sells 1 in-app purchase, starting at $52.99 per year and HiDays sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

倒数 · 纪念日 ships an update every 3 weeks, HiDays every 8 days. The most recent releases landed on October 27, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | 倒数 · 纪念日 | HiDays |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Size | 40 MB | 75 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Enle Inc.](https://appshunter.io/developer/1516608365) | [阳 张](https://appshunter.io/developer/1448121990) |

## What reviewers say

### 倒数 · 纪念日

[App page](https://appshunter.io/ios/app/id1524733387)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 倒数纪念日连续包年会员 | $52.99 | per year |


### HiDays

[App page](https://appshunter.io/ios/app/hidays-countdown-tracker/id1664492584)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Life Time Pro Access | $2.99 | one-time |


## Frequently asked questions

### Is 倒数 · 纪念日 free?

倒数 · 纪念日 is free to download, with in-app purchases available.

### Is HiDays free?

HiDays is free to download, with in-app purchases available.

### Do 倒数 · 纪念日 or HiDays have ads?

倒数 · 纪念日 shows ads; HiDays does not.

### Which is updated more often, 倒数 · 纪念日 or HiDays?

倒数 · 纪念日 ships an update every 3 weeks, and HiDays every 8 days. Most recently, 倒数 · 纪念日 was updated on October 27, 2026 and HiDays on October 4, 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.*