# JTLink vs CO2 Fermentation Calculator

The clearest difference is iOS requirement: CO2 Fermentation Calculator at 11.0 against JTLink's 13.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | JTLink | CO2 Fermentation Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | — |
| Size | 24 MB | 34 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Shenzhen Jointelli Technologies Co., Ltd.](https://appshunter.io/developer/1571471811) | [Logico2 International AB](https://appshunter.io/developer/1208875120) |

## What reviewers say

### JTLink

[App page](https://appshunter.io/ios/app/jtlink/id1571471809)

**Features:** macOS Compatibility

**In-app purchases:** none


### CO2 Fermentation Calculator

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JTLink free?

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

### Is CO2 Fermentation Calculator free?

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

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

Neither JTLink nor CO2 Fermentation Calculator shows ads.

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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.*