# ConvertTiles vs CO2 Fermentation Calculator

The clearest difference is in-app purchases: CO2 Fermentation Calculator at none against ConvertTiles's 1. ConvertTiles's advantage is update cadence (every 3 months vs every 44 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ConvertTiles sells 1 one-off in-app purchase. CO2 Fermentation Calculator asks for nothing beyond the download.

ConvertTiles ships an update every 3 months, CO2 Fermentation Calculator every 44 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | ConvertTiles | CO2 Fermentation Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/converttiles-unit-converter/id6445965059/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 44 months |
| Monetization | Freemium | — |
| Size | 2 MB | 27 MB |
| Requires iOS | 16.1 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Jason Koehn](https://appshunter.io/developer/1666093705) | [Logico2 International AB](https://appshunter.io/developer/1208875120) |

## What reviewers say

### ConvertTiles

[App page](https://appshunter.io/ios/app/converttiles-unit-converter/id6445965059)

This utility app organizes unit converters into distinct tiles, simplifying conversions. It remembers your last used units and offers customization options with a pro subscription. Easily convert between a wide range of measurements.

**Highlights:** Tile-based converter organization, Saves last used units, Custom unit sets (Pro), Custom accent colors (Pro), Colored tile borders, 20 conversion groups

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $9.99 | one-time |


### CO2 Fermentation Calculator

[App page](https://appshunter.io/ios/app/co2-fermentation-calculator/id6446313736)

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

**In-app purchases:** none


## Frequently asked questions

### Is ConvertTiles free?

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

### Is CO2 Fermentation Calculator free?

CO2 Fermentation Calculator is free to download, with no in-app purchases.

### Do ConvertTiles or CO2 Fermentation Calculator have ads?

Neither ConvertTiles nor CO2 Fermentation Calculator shows ads.

### Which is updated more often, ConvertTiles or CO2 Fermentation Calculator?

ConvertTiles ships an update every 3 months, and CO2 Fermentation Calculator every 44 months. Most recently, ConvertTiles was updated on November 3, 2026 and CO2 Fermentation Calculator on November 7, 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.*