# 倒计时纪念日 vs Countdown Calendar

The clearest difference is ads: Countdown Calendar at none against 倒计时纪念日's shown. 倒计时纪念日's advantage is iOS requirement (15.6 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. 倒计时纪念日 sells 3 in-app purchases, starting at $3.99 per month and Countdown Calendar sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

倒计时纪念日 ships an update every 5 days, Countdown Calendar every 6 days. The most recent releases landed on September 9, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | 倒计时纪念日 | Countdown Calendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Every 6 days |
| Size | 98 MB | 18 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [天 杨](https://appshunter.io/developer/1805599844) | [Serhii Surzhykov](https://appshunter.io/developer/1883337368) |

## What reviewers say

### 倒计时纪念日

[App page](https://appshunter.io/ios/app/id6744598040)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 时间倒计日月度会员订阅 | $3.99 | per month |
| 倒数日季度会员解锁 | $7.99 | per 3 months |
| 倒计时年度会员 | $9.99 | per year |


### Countdown Calendar

[App page](https://appshunter.io/ios/app/countdown-calendar-timefeel/id6760222007)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $9.99 | one-time |


## Frequently asked questions

### Is 倒计时纪念日 free?

倒计时纪念日 is free to download, with in-app purchases available.

### Is Countdown Calendar free?

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

### Do 倒计时纪念日 or Countdown Calendar have ads?

倒计时纪念日 shows ads; Countdown Calendar does not.

### Which is updated more often, 倒计时纪念日 or Countdown Calendar?

倒计时纪念日 ships an update every 5 days, and Countdown Calendar every 6 days. Most recently, 倒计时纪念日 was updated on September 9, 2026 and Countdown Calendar on September 23, 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.*