# WärmePilot vs HydroniCalc

The clearest difference is price: HydroniCalc at Free against WärmePilot's $8.99. On ads, in-app purchases, device support and iOS requirement there is nothing between them.

HydroniCalc is free to download; WärmePilot costs $8.99 up front. WärmePilot sells 1 one-off in-app purchase and HydroniCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | WärmePilot | HydroniCalc |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 5 MB | 7 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Julian Christopher Siebert](https://appshunter.io/developer/1830495244) | [Eric Chmara](https://appshunter.io/developer/1892404568) |

## What reviewers say

### WärmePilot

[App page](https://appshunter.io/ios/app/warmepilot/id6761143466)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WärmePilot Pro | $59.99 | one-time |


### 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 WärmePilot free?

WärmePilot costs $8.99, and also offers in-app purchases.

### Is HydroniCalc free?

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

### Do WärmePilot or HydroniCalc have ads?

Neither WärmePilot 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.*