# Professional Barometer vs Q_M

The clearest difference is in-app purchases: Q_M at none against Professional Barometer's 3. Q_M also leads on ads (none vs shown) and update cadence (every 2 days vs every 42 months). On price and device support there is nothing between them.

Both are free to download. Professional Barometer sells 3 in-app purchases, starting at $1.99 per month. Q_M asks for nothing beyond the download.

Professional Barometer ships an update every 42 months, Q_M every 2 days. The most recent releases landed on October 13, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Professional Barometer | Q_M |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (13 ratings)](https://appshunter.io/ios/app/professional-barometer/id1488299474/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 45.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 42 months | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 29 MB | 23 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FFZ srl](https://appshunter.io/developer/533499912) | [DEMIR VEDAT](https://appshunter.io/developer/6778664348) |

## What reviewers say

### Professional Barometer

[App page](https://appshunter.io/ios/app/professional-barometer/id1488299474)

This app provides real-time atmospheric pressure trends to forecast weather changes. It offers precise readings using device sensors and remote weather stations, displaying forecasts, temperature, and humidity. Users can also capture and share photos with superimposed weather data.

**Highlights:** Real-time atmospheric pressure trends, Weather forecasting, Multi-sensor data (device, GPS, remote), Analogue dial display, Temperature and humidity display, Photo capture with weather data overlay, Social media sharing

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 Month | $1.99 | per month |
| Premium 6 Months | $6.99 | per 6 months |
| Premium 1 Year | $11.99 | per year |


### Q_M

[App page](https://appshunter.io/ios/app/q-m/id6778664166)

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

**In-app purchases:** none


## Frequently asked questions

### Is Professional Barometer free?

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

### Is Q_M free?

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

### Do Professional Barometer or Q_M have ads?

Professional Barometer shows ads; Q_M does not.

### Which is updated more often, Professional Barometer or Q_M?

Professional Barometer ships an update every 42 months, and Q_M every 2 days. Most recently, Professional Barometer was updated on October 13, 2026 and Q_M on October 16, 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.*