# Converter Units & Calculator vs UnitDeck

The clearest difference is update cadence: Converter Units & Calculator at every 2 days against UnitDeck's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Converter Units & Calculator sells 2 in-app purchases, starting at $4.99 per 7 days and UnitDeck sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Converter Units & Calculator ships an update every 2 days, UnitDeck every 2 weeks. The most recent releases landed on November 9, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Converter Units & Calculator | UnitDeck |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Size | 10 MB | 3 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Mohammed Alsaleh](https://appshunter.io/developer/1581466887) | [建辉 刘](https://appshunter.io/developer/6790622804) |

## What reviewers say

### Converter Units & Calculator

[App page](https://appshunter.io/ios/app/converter-units-and-calculator/id6759534699)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Lifetime | $19.99 | one-time |


### UnitDeck

[App page](https://appshunter.io/ios/app/unitdeck-work-unit-converter/id6792440865)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UnitDeck Pro – Lifetime | $3.99 | one-time |


## Frequently asked questions

### Is Converter Units & Calculator free?

Converter Units & Calculator is free to download, with in-app purchases available.

### Is UnitDeck free?

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

### Do Converter Units & Calculator or UnitDeck have ads?

Neither Converter Units & Calculator nor UnitDeck shows ads.

### Which is updated more often, Converter Units & Calculator or UnitDeck?

Converter Units & Calculator ships an update every 2 days, and UnitDeck every 2 weeks. Most recently, Converter Units & Calculator was updated on November 9, 2026 and UnitDeck on November 5, 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.*