# Currency&Unit Conversions vs Smart Unit Conversion

The clearest difference is ads: Currency&Unit Conversions at none against Smart Unit Conversion's shown. Currency&Unit Conversions also leads on update cadence (every 2 months vs every 15 months) and iOS requirement (7.0 vs 13.4). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Currency&Unit Conversions sells 1 one-off in-app purchase 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.

Currency&Unit Conversions ships an update every 2 months, Smart Unit Conversion every 15 months. The most recent releases landed on October 17, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Currency&Unit Conversions | Smart Unit Conversion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (49 ratings)](https://appshunter.io/ios/app/currency-and-unit-conversions/id405496989/reviews)** | — |
| Number of ratings | **49** | — |
| Positive reviews | 79.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 15 months |
| Monetization | Free with in-app purchases | — |
| Size | 17 MB | 41 MB |
| Requires iOS | **7.0** | 13.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [38 Softworks Inc.](https://appshunter.io/developer/314907529) | [Yui Lau](https://appshunter.io/developer/1791465155) |

## What reviewers say

### Currency&Unit Conversions

[App page](https://appshunter.io/ios/app/currency-and-unit-conversions/id405496989)

Easily convert between various units and currencies, saving your calculations for later. View all your past conversions in one place, eliminating the need to re-enter data. Supports a wide range of categories including temperature, length, area, volume, and weight.

**Highlights:** Save conversion history, View all conversions at once, Temperature conversion, Currency conversion (158 currencies), Length, Area, Volume, Weight conversions, Supports Foot + Inch and Pound + Ounce

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove All Ads | $1.99 | one-time |

**What reviewers like**

- 👍 Easy to use interface
- 🔄 Works every time
- 🌟 Highly recommended converter
- 💡 Excellent learning tool
- ⚡ Fast and versatile

**What reviewers complain about**

- 📢 Loud, annoying button sounds
- 💸 Frequent, intrusive ads
- 📉 Inaccurate currency conversion
- 🚫 Missing specific conversion types

**Reported bugs**

- Currency not loading
- App crashes instantly
- App won't open

**Requested features**

- Absolute temperature conversions
- Kelvin temperature option


### 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 Currency&Unit Conversions free?

Currency&Unit Conversions 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 Currency&Unit Conversions or Smart Unit Conversion have ads?

Smart Unit Conversion shows ads; Currency&Unit Conversions does not.

### Which is updated more often, Currency&Unit Conversions or Smart Unit Conversion?

Currency&Unit Conversions ships an update every 2 months, and Smart Unit Conversion every 15 months. Most recently, Currency&Unit Conversions was updated on October 17, 2026 and Smart Unit Conversion on October 8, 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.*