# ChronoNano vs Countdown

The clearest difference is in-app purchases: ChronoNano at none against Countdown's 1. ChronoNano also leads on update cadence (every 5 days vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Countdown sells 1 one-off in-app purchase. ChronoNano asks for nothing beyond the download.

ChronoNano ships an update every 5 days, Countdown every 5 months. The most recent releases landed on September 8, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | ChronoNano | Countdown |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 5 months |
| Size | 6 MB | 5 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Saeed Alshamsi](https://appshunter.io/developer/1843100835) | [志琼 羊](https://appshunter.io/developer/1803513635) |

## What reviewers say

### ChronoNano

[App page](https://appshunter.io/ios/app/chrononano/id6753213952)

**Features:** macOS Compatibility

**In-app purchases:** none


### Countdown

[App page](https://appshunter.io/ios/app/countdown-event-timer/id6758383138)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Lifetime | $1.99 | one-time |


## Frequently asked questions

### Is ChronoNano free?

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

### Is Countdown free?

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

### Do ChronoNano or Countdown have ads?

Neither ChronoNano nor Countdown shows ads.

### Which is updated more often, ChronoNano or Countdown?

ChronoNano ships an update every 5 days, and Countdown every 5 months. Most recently, ChronoNano was updated on September 8, 2026 and Countdown on September 15, 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.*