# Kuehlbox vs HydroniCalc

The clearest difference is in-app purchases: Kuehlbox at none against HydroniCalc's 1. Kuehlbox also leads on iOS requirement (11.2 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. HydroniCalc sells 1 one-off in-app purchase. Kuehlbox asks for nothing beyond the download.

## The numbers

| Metric | Kuehlbox | HydroniCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 33 MB | 7 MB |
| Requires iOS | **11.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Suzhou Seitek Co., Ltd](https://appshunter.io/developer/1329632169) | [Eric Chmara](https://appshunter.io/developer/1892404568) |

## What reviewers say

### Kuehlbox

[App page](https://appshunter.io/ios/app/kuehlbox/id1512906903)

**Features:** macOS Compatibility

**In-app purchases:** none


### HydroniCalc

[App page](https://appshunter.io/ios/app/hydronicalc/id6796810526)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Calculators | $12.99 | one-time |


## Frequently asked questions

### Is Kuehlbox free?

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

### Is HydroniCalc free?

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

### Do Kuehlbox or HydroniCalc have ads?

Neither Kuehlbox nor HydroniCalc 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.*