# Multi Calculator vs UnitDeck

The clearest difference is ads: UnitDeck at none against Multi Calculator's shown. UnitDeck also leads on update cadence (every 2 weeks vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Multi Calculator sells 3 in-app purchases, starting at $0.99 per month and UnitDeck sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Multi Calculator ships an update every 4 months, UnitDeck every 2 weeks. The most recent releases landed on October 12, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Multi Calculator | UnitDeck |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 11 MB | 3 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LemonClip](https://appshunter.io/developer/1698254460) | [建辉 刘](https://appshunter.io/developer/6790622804) |

## What reviewers say

### Multi Calculator

[App page](https://appshunter.io/ios/app/multi-calculator-all-in-one/id6760176698)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Annual | $4.99 | per year |
| Lifetime | $9.99 | 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 Multi Calculator free?

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

### Is UnitDeck free?

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

### Do Multi Calculator or UnitDeck have ads?

Multi Calculator shows ads; UnitDeck does not.

### Which is updated more often, Multi Calculator or UnitDeck?

Multi Calculator ships an update every 4 months, and UnitDeck every 2 weeks. Most recently, Multi Calculator was updated on October 12, 2026 and UnitDeck on October 19, 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.*