# 321 Countdown vs Twinkle Clock

The clearest difference is update cadence: 321 Countdown at daily against Twinkle Clock's every 3 weeks. 321 Countdown also leads on iOS requirement (13.0 vs 17.0). Twinkle Clock's advantage is device support (4 vs 2). On price, ads and in-app purchases there is nothing between them.

Both are free to download. 321 Countdown sells 1 one-off in-app purchase and Twinkle Clock sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

321 Countdown ships an update daily, Twinkle Clock every 3 weeks. The most recent releases landed on October 21, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 321 Countdown | Twinkle Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/321-countdown/id1506518580/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 3 weeks |
| Monetization | Free | — |
| Size | 38 MB | 23 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Luis Haitzer](https://appshunter.io/developer/1517692760) | [Hiroyasu Hirai](https://appshunter.io/developer/455568461) |

## What reviewers say

### 321 Countdown

[App page](https://appshunter.io/ios/app/321-countdown/id1506518580)

Easily track time until important events with custom units and backgrounds. Set reminders and organize upcoming occasions with an intuitive design. Enjoy unlimited countdowns and recurring events without any ads or in-app purchases.

**Highlights:** Unlimited simultaneous countdowns, Recurring events, Individual backgrounds, Reminders for approaching occurrences, Dark mode, Conversions into unique units

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support development | $2.99 | one-time |


### Twinkle Clock

[App page](https://appshunter.io/ios/app/twinkle-clock/id6467501688)

**Features:** iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Twinkle Clock Pro | $24.99 | one-time |


## Frequently asked questions

### Is 321 Countdown free?

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

### Is Twinkle Clock free?

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

### Do 321 Countdown or Twinkle Clock have ads?

Neither 321 Countdown nor Twinkle Clock shows ads.

### Which is updated more often, 321 Countdown or Twinkle Clock?

321 Countdown ships an update daily, and Twinkle Clock every 3 weeks. Most recently, 321 Countdown was updated on October 21, 2026 and Twinkle Clock on October 27, 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.*