# CleanAirOptima vs Sticky or Dry

The clearest difference is in-app purchases: CleanAirOptima at none against Sticky or Dry's 1. CleanAirOptima also leads on iOS requirement (12.0 vs 26.0). Sticky or Dry's advantage is update cadence (every 10 days vs every 17 months). On price, ads and device support there is nothing between them.

Both are free to download. Sticky or Dry sells 1 in-app purchase, starting at $2.99 per year. CleanAirOptima asks for nothing beyond the download.

CleanAirOptima ships an update every 17 months, Sticky or Dry every 10 days. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | CleanAirOptima | Sticky or Dry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/cleanairoptima/id1597731227/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 10 days** |
| Size | 194 MB | 5 MB |
| Requires iOS | **12.0** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Clean Air Optima International B.V.](https://appshunter.io/developer/1597731229) | [Arcana Media](https://appshunter.io/developer/1526506285) |

## What reviewers say

### CleanAirOptima

[App page](https://appshunter.io/ios/app/cleanairoptima/id1597731227)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sticky or Dry

[App page](https://appshunter.io/ios/app/sticky-or-dry/id6799988064)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sticky or Dry Pro Yearly | $2.99 | per year |


## Frequently asked questions

### Is CleanAirOptima free?

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

### Is Sticky or Dry free?

Sticky or Dry is free to download, with in-app purchases available.

### Do CleanAirOptima or Sticky or Dry have ads?

Neither CleanAirOptima nor Sticky or Dry shows ads.

### Which is updated more often, CleanAirOptima or Sticky or Dry?

CleanAirOptima ships an update every 17 months, and Sticky or Dry every 10 days. Most recently, CleanAirOptima was updated on October 23, 2026 and Sticky or Dry 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.*