# OlfaPure vs TridentAir

The clearest difference is update cadence: OlfaPure at every 3 months against TridentAir's every 9 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.

OlfaPure ships an update every 3 months, TridentAir every 9 months. The most recent releases landed on October 16, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | OlfaPure | TridentAir |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 9 months |
| Size | 22 MB | 209 MB |
| Requires iOS | 14.1 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [INHALIO, INC.](https://appshunter.io/developer/1520197688) | [Plasma Science Pte Ltd](https://appshunter.io/developer/1777750858) |

## What reviewers say

### OlfaPure

[App page](https://appshunter.io/ios/app/olfapure/id1627246532)

**Features:** macOS Compatibility

**In-app purchases:** none


### TridentAir

[App page](https://appshunter.io/ios/app/tridentair/id6737752945)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OlfaPure free?

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

### Is TridentAir free?

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

### Do OlfaPure or TridentAir have ads?

Neither OlfaPure nor TridentAir shows ads.

### Which is updated more often, OlfaPure or TridentAir?

OlfaPure ships an update every 3 months, and TridentAir every 9 months. Most recently, OlfaPure was updated on October 16, 2026 and TridentAir 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.*