# Unitio vs Calculator Ultra

The clearest difference is in-app purchases: Calculator Ultra at none against Unitio's 3. Calculator Ultra also leads on ads (none vs shown). Unitio's advantage is iOS requirement (15.1 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Unitio sells 3 in-app purchases, starting at $1.99 per 7 days. Calculator Ultra asks for nothing beyond the download.

## The numbers

| Metric | Unitio | Calculator Ultra |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 days | — |
| Size | 44 MB | 4 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kin Man Leung](https://appshunter.io/developer/1716597027) | [phakin chatngamapichat](https://appshunter.io/developer/6792130022) |

## What reviewers say

### Unitio

[App page](https://appshunter.io/ios/app/unitio-unit-converter/id6759262265)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UnitioPro | $1.99 | per 7 days |
| UnitioPro | $3.99 | per month |
| UnitioPro | $24.99 | per year |


### Calculator Ultra

[App page](https://appshunter.io/ios/app/calculator-ultra-smart-math/id6792903428)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Unitio free?

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

### Is Calculator Ultra free?

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

### Do Unitio or Calculator Ultra have ads?

Unitio shows ads; Calculator Ultra does not.

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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.*