# Fast Convert Unit and Measure vs UnitDeck

The clearest difference is ads: UnitDeck at none against Fast Convert Unit and Measure's shown. Fast Convert Unit and Measure's advantage is iOS requirement (13.0 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Fast Convert Unit and Measure sells 6 one-off in-app purchases and UnitDeck sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Fast Convert Unit and Measure ships an update weekly, UnitDeck every 2 weeks. The most recent releases landed on October 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Fast Convert Unit and Measure | UnitDeck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (25 ratings)](https://appshunter.io/ios/app/fast-convert-unit-and-measure/id1487858270/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 87.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 176 MB | 3 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bruno Bongiovanni](https://appshunter.io/developer/911582662) | [建辉 刘](https://appshunter.io/developer/6790622804) |

## What reviewers say

### Fast Convert Unit and Measure

[App page](https://appshunter.io/ios/app/fast-convert-unit-and-measure/id1487858270)

Easily convert between various units and metrics with a streamlined interface. Quickly access frequently used conversions through automatic shortcuts. Supports over 130 units across 20 categories, with options to customize decimals and reorganize metrics.

**Highlights:** Automatic shortcut creation for frequent units, Customizable number of decimals, Reorganize metric shortcuts, Over 130 units in 20 categories, Streamlined and simple interface, Fast conversion tables for cooking, shoes, and more

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tip 10% | $0.99 | one-time |
| Tip 15% | $1.99 | one-time |
| Unlock app | $1.99 | one-time |
| Tip 20% | $2.99 | one-time |
| Tip 20% | $3.99 | one-time |
| Tip 25% | $4.99 | 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 Fast Convert Unit and Measure free?

Fast Convert Unit and Measure is free to download, with in-app purchases available.

### Is UnitDeck free?

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

### Do Fast Convert Unit and Measure or UnitDeck have ads?

Fast Convert Unit and Measure shows ads; UnitDeck does not.

### Which is updated more often, Fast Convert Unit and Measure or UnitDeck?

Fast Convert Unit and Measure ships an update weekly, and UnitDeck every 2 weeks. Most recently, Fast Convert Unit and Measure was updated on October 6, 2026 and UnitDeck on October 25, 2026.

---

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