# unitCalc vs 鳥音辨識

The clearest difference is iOS requirement: 鳥音辨識 at 13.0 against unitCalc's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

unitCalc ships an update monthly, 鳥音辨識 every 3 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | unitCalc | 鳥音辨識 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 1 MB | 201 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [培祐 黃](https://appshunter.io/developer/1053411333) | [Aurismart Technology Corporation](https://appshunter.io/developer/1531991960) |

## What reviewers say

### unitCalc

[App page](https://appshunter.io/ios/app/unitcalc/id6445979881)

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

**In-app purchases:** none


### 鳥音辨識

[App page](https://appshunter.io/ios/app/id6749441109)

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

**In-app purchases:** none


## Frequently asked questions

### Is unitCalc free?

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

### Is 鳥音辨識 free?

鳥音辨識 is free to download, with no in-app purchases.

### Do unitCalc or 鳥音辨識 have ads?

Neither unitCalc nor 鳥音辨識 shows ads.

### Which is updated more often, unitCalc or 鳥音辨識?

unitCalc ships an update monthly, and 鳥音辨識 every 3 weeks. Most recently, unitCalc was updated on November 3, 2026 and 鳥音辨識 on October 30, 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.*