# NBack 3D vs SPILO think（スピロ・シンク）

The clearest difference is in-app purchases: SPILO think（スピロ・シンク） at none against NBack 3D's 1. SPILO think（スピロ・シンク） also leads on ads (none vs shown) and update cadence (every 5 days vs every 10 months). On price and device support there is nothing between them.

Both are free to download. NBack 3D sells 1 one-off in-app purchase. SPILO think（スピロ・シンク） asks for nothing beyond the download.

NBack 3D ships an update every 10 months, SPILO think（スピロ・シンク） every 5 days. The most recent releases landed on September 11, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | NBack 3D | SPILO think（スピロ・シンク） |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nback-3d/id1407606652/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 10 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 128 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) | [Yuko Takahashi](https://appshunter.io/developer/1708191163) |

## What reviewers say

### NBack 3D

[App page](https://appshunter.io/ios/app/nback-3d/id1407606652)

This app challenges your memory by requiring you to count 3D shapes of specific colors. As the 'N' value increases, the difficulty escalates, testing your ability to recall past stimuli in a sequence.

**Highlights:** N-Back memory challenge, 3D shape and color recognition, Increasing difficulty levels, Sequence memorization, Cognitive skill enhancement

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Extend to 20'Back & Remove Ads | $2.99 | one-time |


### SPILO think（スピロ・シンク）

[App page](https://appshunter.io/ios/app/spilo-think/id1574016683)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NBack 3D free?

NBack 3D is free to download, with in-app purchases available.

### Is SPILO think（スピロ・シンク） free?

SPILO think（スピロ・シンク） is free to download, with no in-app purchases.

### Do NBack 3D or SPILO think（スピロ・シンク） have ads?

NBack 3D shows ads; SPILO think（スピロ・シンク） does not.

### Which is updated more often, NBack 3D or SPILO think（スピロ・シンク）?

NBack 3D ships an update every 10 months, and SPILO think（スピロ・シンク） every 5 days. Most recently, NBack 3D was updated on September 11, 2026 and SPILO think（スピロ・シンク） on September 24, 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.*