# Barometer Plus vs Smog Selfie

The clearest difference is rating: Smog Selfie at 5.0 against Barometer Plus's 4.0. Smog Selfie also leads on in-app purchases (none vs 4) and ads (none vs shown). Barometer Plus's advantage is ratings volume (420 vs 5) and update cadence (every 6 weeks vs every 6 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Barometer Plus sells 4 one-off in-app purchases. Smog Selfie asks for nothing beyond the download.

Smog Selfie holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Barometer Plus has 420 ratings behind it against 5, so its average is the more settled of the two.

Barometer Plus ships an update every 6 weeks, Smog Selfie every 6 months. The most recent releases landed on October 26, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Barometer Plus | Smog Selfie |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (420 ratings)](https://appshunter.io/ios/app/barometer-plus-altimeter/id1071044152/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/smog-selfie/id1472287164/reviews)** |
| Number of ratings | **420** | 5 |
| Positive reviews | 63.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 6 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 40 MB | 64 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Ngo Na](https://appshunter.io/developer/1061345952) | [Heiko Sacher](https://appshunter.io/developer/1460424964) |

## What reviewers say

### Barometer Plus

[App page](https://appshunter.io/ios/app/barometer-plus-altimeter/id1071044152)

This app measures air pressure and altitude using your device's built-in sensor. It helps predict weather changes, monitor health impacts of pressure fluctuations, and optimize activities like fishing. Customize its appearance and receive notifications about significant pressure shifts.

**Highlights:** Barometer and altimeter with analog display, Temperature and humidity readings, Pressure and altitude unit conversion, GPS and airport data calibration, Relative altitude measurement, Pressure change notifications, History tracking and graph

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads, Widget and Export | $0.99 | one-time |
| Unlimited custom rules | $0.99 | one-time |
| Exact update interval | $1.99 | one-time |
| Platinum Edition | $3.99 | one-time |

**What reviewers like**

- 🚀 Accurate
- 👍 Easy to use
- 🔍 Helpful for tracking migraines/arthritis
- 💡 Customizable settings
- 🔍 Useful for weather/fishing/aviation

**What reviewers complain about**

- 🐛 Inaccurate readings
- 📺 Intrusive ads
- 🔒 Privacy concerns with fitness tracking
- 🔋 Drains battery
- 🤔 Confusing interface

**Reported bugs**

- Stops tracking pressure changes
- Incompatible with iOS 10 on iPads
- Freezes or crashes on launch

**Requested features**

- Pressure trend indicators
- Customizable graphs and data export
- Notifications for pressure changes
- Arthritis/migraine warning indicators


### Smog Selfie

[App page](https://appshunter.io/ios/app/smog-selfie/id1472287164)

This app uses your location to fetch current air quality data and applies augmented reality face filters that correspond to the pollution levels. It encourages users to be aware of and share the impact of air pollution.

**Highlights:** Real-time air quality index retrieval, Location-based AR face filters, Visualizes pollution impact, Encourages awareness and sharing, Privacy-focused face data handling

**In-app purchases:** none


## Frequently asked questions

### Is Barometer Plus free?

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

### Is Smog Selfie free?

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

### Which has better reviews, Barometer Plus or Smog Selfie?

Smog Selfie is rated higher. Barometer Plus averages 4.0 out of 5 from 420 ratings, while Smog Selfie averages 5.0 from 5 ratings.

### Do Barometer Plus or Smog Selfie have ads?

Barometer Plus shows ads; Smog Selfie does not.

### Which is updated more often, Barometer Plus or Smog Selfie?

Barometer Plus ships an update every 6 weeks, and Smog Selfie every 6 months. Most recently, Barometer Plus was updated on October 26, 2026 and Smog Selfie on October 6, 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.*