# Unit Converter and Conversion vs Sol

The clearest difference is in-app purchases: Sol at none against Unit Converter and Conversion's 1. Sol also leads on update cadence (fortnightly vs every 10 months) and iOS requirement (11.0 vs 15.0). Unit Converter and Conversion's advantage is device support. On price there is nothing between them.

Both are free to download. Unit Converter and Conversion sells 1 one-off in-app purchase. Sol asks for nothing beyond the download.

Unit Converter and Conversion ships an update every 10 months, Sol fortnightly. The most recent releases landed on October 11, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Unit Converter and Conversion | Sol |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (48 ratings)](https://appshunter.io/ios/app/unit-converter-and-conversion/id1350107532/reviews)** | — |
| Number of ratings | **48** | — |
| Positive reviews | 81.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | — |
| Update frequency | Every 10 months | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 42 MB | 30 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Asad Ahsan](https://appshunter.io/developer/1326954499) | [Cyberlog inc](https://appshunter.io/developer/1336152689) |

## What reviewers say

### Unit Converter and Conversion

[App page](https://appshunter.io/ios/app/unit-converter-and-conversion/id1350107532)

This app offers a user-friendly interface for converting units across more than 40 categories, including length, weight, volume, and digital storage. It works offline and saves conversion history for future reference. Ideal for students and professionals needing quick and accurate conversions.

**Highlights:** Over 40 conversion categories, Offline functionality, Conversion history saving, User-friendly interface, Supports length, weight, volume, and more, Elegant graphics

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unit Converter Pro | $4.99 | one-time |


### Sol

[App page](https://appshunter.io/ios/app/sol/id6478173531)

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter and Conversion free?

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

### Is Sol free?

Sol is free to download, with no in-app purchases.

### Which is updated more often, Unit Converter and Conversion or Sol?

Unit Converter and Conversion ships an update every 10 months, and Sol fortnightly. Most recently, Unit Converter and Conversion was updated on October 11, 2026 and Sol on October 4, 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.*