# AirNotis vs OnTime

The clearest difference is in-app purchases: AirNotis at none against OnTime's 3. AirNotis also leads on iOS requirement (13.0 vs 17.0). OnTime's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. OnTime sells 3 in-app purchases, starting at $1.99 per 7 days. AirNotis asks for nothing beyond the download.

AirNotis ships an update every 2 months, OnTime every 3 weeks. The most recent releases landed on October 20, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | AirNotis | OnTime |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (5 ratings)](https://appshunter.io/ios/app/airnotis/id1668045716/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 39 MB | 8 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BLUEFEEL Co., Ltd.](https://appshunter.io/developer/1668042748) | [Andy Arevalo](https://appshunter.io/developer/1853674132) |

## What reviewers say

### AirNotis

[App page](https://appshunter.io/ios/app/airnotis/id1668045716)

Monitor six types of air quality, including CO2, fine dust, and temperature, in real-time. This portable device and its exclusive app allow for easy connection to multiple smartphones and offer customizable notifications and settings for various environments.

**Highlights:** Real-time air quality monitoring, Measures CO2, CO, fine dust, ultrafine dust, TVOC, temp/humidity, Compact and portable for any location, Connect to multiple smartphones, Customizable notifications and settings, Supports multiple environmental standards

**Features:** macOS Compatibility

**In-app purchases:** none


### OnTime

[App page](https://appshunter.io/ios/app/ontime-speech-and-debate-timer/id6755796055)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro | $1.99 | per 7 days |
| Monthly Pro | $4.99 | per month |
| Yearly Pro | $14.99 | per year |


## Frequently asked questions

### Is AirNotis free?

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

### Is OnTime free?

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

### Do AirNotis or OnTime have ads?

Neither AirNotis nor OnTime shows ads.

### Which is updated more often, AirNotis or OnTime?

AirNotis ships an update every 2 months, and OnTime every 3 weeks. Most recently, AirNotis was updated on October 20, 2026 and OnTime on October 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.*