# AIRsistant vs Scent Harmony

The clearest difference is update cadence: AIRsistant at every 2 months against Scent Harmony's every 11 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.

AIRsistant ships an update every 2 months, Scent Harmony every 11 months. The most recent releases landed on September 13, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | AIRsistant | Scent Harmony |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 10.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 11 months |
| Monetization | Free | — |
| Size | 61 MB | 4 MB |
| Requires iOS | 10.2 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Schrader International GmbH](https://appshunter.io/developer/988732081) | [Immaculate Nduta](https://appshunter.io/developer/1620860472) |

## What reviewers say

### AIRsistant

[App page](https://appshunter.io/ios/app/airsistant/id1593429837)

Monitor your bicycle tires' air pressure and temperature in real-time. Receive alerts for deviations from optimal pressure and easily adjust settings with a digital gauge. Navigate to your destination with optimized bike routes, all within the app.

**Highlights:** Real-time pressure and temperature monitoring, Audio and visual alerts for pressure deviations, Digital pressure gauge for easy adjustment, Tyre pressure calculator, Integrated navigation with bike routes, Compatible with Garmin devices

**Features:** macOS Compatibility

**In-app purchases:** none


### Scent Harmony

[App page](https://appshunter.io/ios/app/scent-harmony/id1670604472)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AIRsistant free?

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

### Is Scent Harmony free?

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

### Do AIRsistant or Scent Harmony have ads?

Neither AIRsistant nor Scent Harmony shows ads.

### Which is updated more often, AIRsistant or Scent Harmony?

AIRsistant ships an update every 2 months, and Scent Harmony every 11 months. Most recently, AIRsistant was updated on September 13, 2026 and Scent Harmony on May 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*