# AD8 vs NNAT

The clearest difference is in-app purchases: AD8 at none against NNAT's 1. NNAT's advantage is update cadence (every 2 weeks vs every 30 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. NNAT sells 1 one-off in-app purchase. AD8 asks for nothing beyond the download.

AD8 ships an update every 30 months, NNAT every 2 weeks. The most recent releases landed on October 4, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | AD8 | NNAT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 2 weeks** |
| Size | 15 MB | 138 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Washington University in St. Louis](https://appshunter.io/developer/431339390) | [Perfect Consulting B.V.](https://appshunter.io/developer/1562668783) |

## What reviewers say

### AD8

[App page](https://appshunter.io/ios/app/ad8/id1194123984)

**Features:** macOS Compatibility

**In-app purchases:** none


### NNAT

[App page](https://appshunter.io/ios/app/nnat-3-practice/id6740410497)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Get PRO with On-Time Payment! | $9.99 | one-time |


## Frequently asked questions

### Is AD8 free?

AD8 is free to download, with no in-app purchases.

### Is NNAT free?

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

### Do AD8 or NNAT have ads?

Neither AD8 nor NNAT shows ads.

### Which is updated more often, AD8 or NNAT?

AD8 ships an update every 30 months, and NNAT every 2 weeks. Most recently, AD8 was updated on October 4, 2026 and NNAT on October 1, 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.*