# Unit Converter vs ChirpAlarm

The clearest difference is in-app purchases: ChirpAlarm at none against Unit Converter's 2. ChirpAlarm also leads on update cadence (daily vs every 10 days). Unit Converter's advantage is iOS requirement (13.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. Unit Converter sells 2 one-off in-app purchases. ChirpAlarm asks for nothing beyond the download.

Unit Converter ships an update every 10 days, ChirpAlarm daily. The most recent releases landed on October 29, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Unit Converter | ChirpAlarm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/chirpalarm/id6765998921/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 days | **Daily** |
| Monetization | — | Free |
| Size | 25 MB | 2 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [磊 刘](https://appshunter.io/developer/1892400556) | [Jonathan Hu](https://appshunter.io/developer/1896157232) |

## What reviewers say

### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-free-and-easy/id6762030231)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unit Conversion Standard Version | $2.99 | one-time |
| Unit Conversion Pro Edition | $5.99 | one-time |


### ChirpAlarm

[App page](https://appshunter.io/ios/app/chirpalarm/id6765998921)

Wake up to authentic bird recordings and test your species identification skills to dismiss your alarm. This app helps birders start their day immersed in nature and improve their sound identification abilities.

**Highlights:** Authentic bird sound recordings, Species identification quiz to dismiss alarm, Customizable species lists, Quiz history and statistics, Bird information with images and descriptions, No ads or subscriptions

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter free?

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

### Is ChirpAlarm free?

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

### Do Unit Converter or ChirpAlarm have ads?

Neither Unit Converter nor ChirpAlarm shows ads.

### Which is updated more often, Unit Converter or ChirpAlarm?

Unit Converter ships an update every 10 days, and ChirpAlarm daily. Most recently, Unit Converter was updated on October 29, 2026 and ChirpAlarm on October 10, 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.*