# All Units Convertor vs Smart Unit Conversion

The clearest difference is update cadence: All Units Convertor at fortnightly against Smart Unit Conversion's every 15 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. All Units Convertor sells 2 one-off in-app purchases 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.

All Units Convertor ships an update fortnightly, Smart Unit Conversion every 15 months. The most recent releases landed on September 11, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | All Units Convertor | Smart Unit Conversion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/all-units-convertor/id1611287048/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Fortnightly** | Every 15 months |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 41 MB |
| Requires iOS | **13.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [恒卓 刘](https://appshunter.io/developer/509484187) | [Yui Lau](https://appshunter.io/developer/1791465155) |

## What reviewers say

### All Units Convertor

[App page](https://appshunter.io/ios/app/all-units-convertor/id1611287048)

Easily convert between various units of measurement, including currency, length, mass, and temperature. Features real-time currency exchange rates and a clean, intuitive interface for quick conversions.

**Highlights:** Supports 10 common unit types, Real-time currency exchange rates, Clear, at-a-glance conversions, iOS system UI compatibility, Converts currency, energy, length, temperature, mass, angle, time, area, bytes, force, volume, torque

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一杯可乐 | $0.99 | one-time |
| 一杯咖啡 | $1.99 | one-time |


### Smart Unit Conversion

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

**Features:** macOS Compatibility

**In-app purchases (1)**

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


## Frequently asked questions

### Is All Units Convertor free?

All Units Convertor 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 All Units Convertor or Smart Unit Conversion have ads?

Both All Units Convertor and Smart Unit Conversion show ads.

### Which is updated more often, All Units Convertor or Smart Unit Conversion?

All Units Convertor ships an update fortnightly, and Smart Unit Conversion every 15 months. Most recently, All Units Convertor was updated on September 11, 2026 and Smart Unit Conversion on May 16, 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.*