# AlertaViva vs HydroniCalc

AlertaViva and HydroniCalc are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. AlertaViva sells 7 in-app purchases, starting at $14.99 per year and HydroniCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | AlertaViva | HydroniCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | — |
| Size | 11 MB | 7 MB |
| Requires iOS | **16.2** | 17.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Sergio Morillas](https://appshunter.io/developer/1030882187) | [Eric Chmara](https://appshunter.io/developer/1892404568) |

## What reviewers say

### AlertaViva

[App page](https://appshunter.io/ios/app/alertaviva/id6757915625)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Acceso Personal Anual | $14.99 | per year |
| Colectivo Plus Anual | $89.99 | per year |
| Cuidador Profesional | $89.99 | per year |
| Empresa Plus Anual | $89.99 | per year |
| Empresa Premium | $179.99 | per year |
| Colectivo Premium Anual | $179.99 | per year |
| Empresa Cuidadora | $179.99 | per year |


### 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 AlertaViva free?

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

### Is HydroniCalc free?

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

### Do AlertaViva or HydroniCalc have ads?

Neither AlertaViva 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.*