# EMspec vs UNO IAQ

The clearest difference is iOS requirement: UNO IAQ at 14.0 against EMspec's 17.5. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | EMspec | UNO IAQ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Size | 3 MB | 23 MB |
| Requires iOS | 17.5 | **14.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EMspec](https://appshunter.io/developer/1407698355) | [Delta Electronics, Inc.](https://appshunter.io/developer/386896582) |

## What reviewers say

### EMspec

[App page](https://appshunter.io/ios/app/emspec/id1407698356)

**Features:** macOS Compatibility

**In-app purchases:** none


### UNO IAQ

[App page](https://appshunter.io/ios/app/uno-iaq/id1510293346)

**In-app purchases:** none


## Frequently asked questions

### Is EMspec free?

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

### Is UNO IAQ free?

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

### Do EMspec or UNO IAQ have ads?

Neither EMspec nor UNO IAQ shows ads.

### Which is updated more often, EMspec or UNO IAQ?

EMspec ships an update every 2 months, and UNO IAQ every 2 months. Most recently, EMspec was updated on October 14, 2026 and UNO IAQ on October 12, 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.*