# UnitSnap vs UnitDeck

The clearest difference is ads: UnitDeck at none against UnitSnap'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. UnitSnap sells 1 one-off in-app purchase and UnitDeck sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UnitSnap ships an update every 4 months, UnitDeck every 2 weeks. The most recent releases landed on October 14, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | UnitSnap | UnitDeck |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Size | 4 MB | 3 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Chia-Chun Hsieh](https://appshunter.io/developer/908221958) | [建辉 刘](https://appshunter.io/developer/6790622804) |

## What reviewers say

### UnitSnap

[App page](https://appshunter.io/ios/app/unitsnap/id6742785813)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | 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 UnitSnap free?

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

### Is UnitDeck free?

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

### Do UnitSnap or UnitDeck have ads?

UnitSnap shows ads; UnitDeck does not.

### Which is updated more often, UnitSnap or UnitDeck?

UnitSnap ships an update every 4 months, and UnitDeck every 2 weeks. Most recently, UnitSnap was updated on October 14, 2026 and UnitDeck on October 19, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*