# HydroniCalc vs Solar Pump

The clearest difference is in-app purchases: Solar Pump at none against HydroniCalc's 1. Solar Pump also leads on iOS requirement (15.1 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. Solar Pump asks for nothing beyond the download.

## The numbers

| Metric | HydroniCalc | Solar Pump |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 4 days |
| Size | 7 MB | 25 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Eric Chmara](https://appshunter.io/developer/1892404568) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## What reviewers say

### 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 |


### Solar Pump

[App page](https://appshunter.io/ios/app/solar-pump-solar-pumping/id6800800302)

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

**In-app purchases:** none


## Frequently asked questions

### Is HydroniCalc free?

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

### Is Solar Pump free?

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

### Do HydroniCalc or Solar Pump have ads?

Neither HydroniCalc nor Solar Pump 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.*