# NBack for iPad Lite vs Size test

The clearest difference is price: NBack for iPad Lite at Free against Size test's $0.99. Size test's advantage is ads (none vs shown) and iOS requirement (14.0 vs 18.2). On update cadence, in-app purchases and device support there is nothing between them.

NBack for iPad Lite is free to download; Size test costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

NBack for iPad Lite ships an update every 12 months, Size test every 10 months. The most recent releases landed on October 6, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | NBack for iPad Lite | Size test |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/nback-for-ipad-lite/id506570446/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Every 10 months** |
| Monetization | Ad-supported | — |
| Size | 7 MB | 1 MB |
| Requires iOS | 18.2 | **14.0** |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [Viacheslav Romanenko](https://appshunter.io/developer/1046372418) |

## What reviewers say

### NBack for iPad Lite

[App page](https://appshunter.io/ios/app/nback-for-ipad-lite/id506570446)

This application helps improve mental acuity by training working memory through a sequence-matching game. Users are presented with stimuli and must recall the item from a specified number of steps prior in the sequence. It offers a simplified version of a more comprehensive training tool.

**Highlights:** Working memory training, Sequence matching game, Adjustable difficulty (1-2 back), Improves mental ability, Lite version of full app

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

**In-app purchases:** none


### Size test

[App page](https://appshunter.io/ios/app/size-test/id1059703529)

**In-app purchases:** none


## Frequently asked questions

### Is NBack for iPad Lite free?

NBack for iPad Lite is free to download, with no in-app purchases.

### Is Size test free?

Size test costs $0.99, with no in-app purchases.

### Do NBack for iPad Lite or Size test have ads?

NBack for iPad Lite shows ads; Size test does not.

### Which is updated more often, NBack for iPad Lite or Size test?

NBack for iPad Lite ships an update every 12 months, and Size test every 10 months. Most recently, NBack for iPad Lite was updated on October 6, 2026 and Size test on September 30, 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.*