# Caern vs Postos JM

The clearest difference is review sentiment: Postos JM at 100% against Caern's 76%. Postos JM also leads on iOS requirement (13.0 vs 15.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Caern ships an update every 5 months, Postos JM every 6 months. The most recent releases landed on October 4, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Caern | Postos JM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/caern/id1441305342/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 76.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 6 months |
| Monetization | Free | Free |
| Size | 27 MB | 70 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Caern - Companhia de Aguas e Esgotos do Rio Grande do Norte](https://appshunter.io/developer/1229833153) | [POSTOAKI DESENVOLVIMENTO TECNOLOGICO LTDA](https://appshunter.io/developer/1186130596) |

## What reviewers say

### Caern

[App page](https://appshunter.io/ios/app/caern/id1441305342)

This utility app serves as a communication channel for users to request emergency services like water outages and leaks. It also allows for viewing open bills and records, and finding service locations.

**Highlights:** Emergency service requests, View open bills, View open records, Find service locations, Water outage reporting, Leak reporting

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

**In-app purchases:** none


### Postos JM

[App page](https://appshunter.io/ios/app/postos-jm/id1527821287)

This app provides information about a network of fuel stations across Rio Grande do Norte. It highlights the company's history, extensive reach, and commitment to quality service through its dedicated team.

**Highlights:** Company history and legacy, Network of 16 fuel stations, Presence across Rio Grande do Norte, Commitment to quality standards, Information on company team

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Caern free?

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

### Is Postos JM free?

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

### Do Caern or Postos JM have ads?

Neither Caern nor Postos JM shows ads.

### Which is updated more often, Caern or Postos JM?

Caern ships an update every 5 months, and Postos JM every 6 months. Most recently, Caern was updated on October 4, 2026 and Postos JM on September 25, 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.*