# Air Observer vs CRES B

The clearest difference is update cadence: CRES B at every 5 months against Air Observer's every 28 months. 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.

Air Observer ships an update every 28 months, CRES B every 5 months. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Air Observer | CRES B |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/air-observer/id989644506/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 5 months** |
| Monetization | Free | — |
| Size | 2 MB | 20 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Peter Thornycroft](https://appshunter.io/developer/862687029) | [VegaSRL](https://appshunter.io/developer/1638287422) |

## What reviewers say

### Air Observer

[App page](https://appshunter.io/ios/app/air-observer/id989644506)

This app helps diagnose Wi-Fi connection issues on iOS devices. It measures local Wi-Fi health and wide area connection to a server, helping users understand signal strength and potential interference.

**Highlights:** Diagnose Wi-Fi connection health, Measure local Wi-Fi signal strength, Assess wide area connection to server, Identify wireless interference, Differentiate Wi-Fi vs. Internet issues

**Features:** macOS Compatibility

**In-app purchases:** none


### CRES B

[App page](https://appshunter.io/ios/app/cres-b-tool/id6749270322)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Air Observer free?

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

### Is CRES B free?

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

### Do Air Observer or CRES B have ads?

Neither Air Observer nor CRES B shows ads.

### Which is updated more often, Air Observer or CRES B?

Air Observer ships an update every 28 months, and CRES B every 5 months. Most recently, Air Observer was updated on November 1, 2026 and CRES B on November 5, 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.*