# Countdown vs Timeline時間軸

The clearest difference is in-app purchases: Timeline時間軸 at none against Countdown's 3. Timeline時間軸 also leads on update cadence (every 2 days vs every 2 weeks) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Countdown sells 3 in-app purchases, starting at $1.99 per month. Timeline時間軸 asks for nothing beyond the download.

Countdown ships an update every 2 weeks, Timeline時間軸 every 2 days. The most recent releases landed on October 28, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Countdown | Timeline時間軸 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Size | 19 MB | 17 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ILYAS TORUN](https://appshunter.io/developer/1866242866) | [Chun Keung Yeung](https://appshunter.io/developer/1700353777) |

## What reviewers say

### Countdown

[App page](https://appshunter.io/ios/app/countdown-memento-calendar/id6757344347)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $1.99 | per month |
| Premium Yearly | $14.99 | per year |
| Memento Calendar Pro Lifetime | $39.99 | one-time |


### Timeline時間軸

[App page](https://appshunter.io/ios/app/timeline/id6761250039)

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

**In-app purchases:** none


## Frequently asked questions

### Is Countdown free?

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

### Is Timeline時間軸 free?

Timeline時間軸 is free to download, with no in-app purchases.

### Do Countdown or Timeline時間軸 have ads?

Neither Countdown nor Timeline時間軸 shows ads.

### Which is updated more often, Countdown or Timeline時間軸?

Countdown ships an update every 2 weeks, and Timeline時間軸 every 2 days. Most recently, Countdown was updated on October 28, 2026 and Timeline時間軸 on October 12, 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.*