# ANPR vs HidroObserva

The clearest difference is update cadence: HidroObserva at fortnightly against ANPR's every 7 months. ANPR's advantage is iOS requirement (11.0 vs 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.

ANPR ships an update every 7 months, HidroObserva fortnightly. The most recent releases landed on September 10, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | ANPR | HidroObserva |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Fortnightly** |
| Size | 38 MB | 64 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TRIDIA CRIACAO E DESENVOLVIMENTO DE SOFTWARE LTDA ME](https://appshunter.io/developer/1142612176) | [Servicos e Informacoes do Brasil](https://appshunter.io/developer/1475781851) |

## What reviewers say

### ANPR

[App page](https://appshunter.io/ios/app/anpr/id1484721008)

**Features:** macOS Compatibility

**In-app purchases:** none


### HidroObserva

[App page](https://appshunter.io/ios/app/hidroobserva/id6449265378)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ANPR free?

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

### Is HidroObserva free?

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

### Do ANPR or HidroObserva have ads?

Neither ANPR nor HidroObserva shows ads.

### Which is updated more often, ANPR or HidroObserva?

ANPR ships an update every 7 months, and HidroObserva fortnightly. Most recently, ANPR was updated on September 10, 2026 and HidroObserva on September 12, 2026.

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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.*