# Uniter vs Smart Unit Conversion

The clearest difference is ads: Uniter at none against Smart Unit Conversion's shown. Uniter also leads on update cadence (every 4 days vs every 15 months). Smart Unit Conversion's advantage is iOS requirement (13.4 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Uniter sells 3 in-app purchases, starting at $3.99 per month and Smart Unit Conversion sells 1 in-app purchase, starting at $1.99 per year. Whichever you choose, the download price is not the number that matters.

Uniter ships an update every 4 days, Smart Unit Conversion every 15 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Uniter | Smart Unit Conversion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (74 ratings)](https://appshunter.io/ios/app/uniter-unit-converter/id1589272507/reviews)** | — |
| Number of ratings | **74** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 15 months |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 41 MB |
| Requires iOS | 26.0 | **13.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Arkadiusz Holko](https://appshunter.io/developer/683846458) | [Yui Lau](https://appshunter.io/developer/1791465155) |

## What reviewers say

### Uniter

[App page](https://appshunter.io/ios/app/uniter-unit-converter/id1589272507)

Effortlessly convert units of measurement directly within text, websites, or even through your camera. This utility automatically detects and converts units to your preferred system, supporting a vast array of measurement types.

**Highlights:** Automatic unit conversion, Live side-by-side converter, File import for conversion, Camera text scanning, Safari extension, Extensive unit support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Uniter Pro (Monthly) | $3.99 | per month |
| Uniter Pro (Annual) | $14.99 | per year |
| Uniter Pro (Lifetime) | $39.99 | one-time |


### Smart Unit Conversion

[App page](https://appshunter.io/ios/app/smart-unit-conversion/id1643381985)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Year | $1.99 | per year |


## Frequently asked questions

### Is Uniter free?

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

### Is Smart Unit Conversion free?

Smart Unit Conversion is free to download, with in-app purchases available.

### Do Uniter or Smart Unit Conversion have ads?

Smart Unit Conversion shows ads; Uniter does not.

### Which is updated more often, Uniter or Smart Unit Conversion?

Uniter ships an update every 4 days, and Smart Unit Conversion every 15 months. Most recently, Uniter was updated on October 25, 2026 and Smart Unit Conversion on October 27, 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.*