# HydraGO vs TerraRad

The clearest difference is iOS requirement: HydraGO at 9.0 against TerraRad'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 | HydraGO | TerraRad |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | — |
| Size | 5 MB | 22 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stevens Water Monitoring Systems, Inc.](https://appshunter.io/developer/503634320) | [TerraRad Tech AG](https://appshunter.io/developer/1676240007) |

## What reviewers say

### HydraGO

[App page](https://appshunter.io/ios/app/hydrago/id1435520710)

**Features:** macOS Compatibility

**In-app purchases:** none


### TerraRad

[App page](https://appshunter.io/ios/app/terrarad/id6761919675)

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

**In-app purchases:** none


## Frequently asked questions

### Is HydraGO free?

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

### Is TerraRad free?

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

### Do HydraGO or TerraRad have ads?

Neither HydraGO nor TerraRad shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*