# BrushUp Mental Exercises vs Thread Sort 3D

The clearest difference is in-app purchases: Thread Sort 3D at none against BrushUp Mental Exercises's 2. Thread Sort 3D also leads on update cadence (weekly vs every 23 months). BrushUp Mental Exercises's advantage is ads (none vs shown) and rating (4.9 vs 4.7). On price, device support and iOS requirement there is nothing between them.

Both are free to download. BrushUp Mental Exercises sells 2 one-off in-app purchases. Thread Sort 3D asks for nothing beyond the download.

BrushUp Mental Exercises holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: BrushUp Mental Exercises has 24 ratings behind it against 3, so its average is the more settled of the two.

BrushUp Mental Exercises ships an update every 23 months, Thread Sort 3D weekly. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | BrushUp Mental Exercises | Thread Sort 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (24 ratings)](https://appshunter.io/ios/app/brushup-mental-exercises/id1450906325/reviews)** | [4.7 (3 ratings)](https://appshunter.io/ios/app/thread-sort-3d-screw-puzzle/id6747078887/reviews) |
| Number of ratings | **24** | 3 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 23 months | **Weekly** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 19 MB | 379 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nicholas Giarraputo](https://appshunter.io/developer/1328808777) | [巧莲 李](https://appshunter.io/developer/1659765811) |

## What reviewers say

### BrushUp Mental Exercises

[App page](https://appshunter.io/ios/app/brushup-mental-exercises/id1450906325)

This app offers mental math exercises designed to improve cognitive abilities, memory, and emotional health. Users can choose custom difficulty levels and practice specific math skills to make complex mathematics easier. Consistent practice is encouraged for long-term benefits.

**Highlights:** Mental math exercises, Custom difficulty levels, Improve memory function, Boost cognitive abilities, Enhance emotional health, Practice specific math skills

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5000 Points | $0.99 | one-time |
| Premium | $1.99 | one-time |


### Thread Sort 3D

[App page](https://appshunter.io/ios/app/thread-sort-3d-screw-puzzle/id6747078887)

Untangle colorful threads from fluffy objects in this relaxing 3D puzzle game. Simple tap controls make it easy to transform chaos into order, offering a stress-free and rewarding experience perfect for unwinding.

**Highlights:** Untangle colorful threads, Calming 3D puzzle gameplay, Simple tap controls, Mindful and stress-free experience, Rewarding progress

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BrushUp Mental Exercises free?

BrushUp Mental Exercises is free to download, with in-app purchases available.

### Is Thread Sort 3D free?

Thread Sort 3D is free to download, with no in-app purchases.

### Which has better reviews, BrushUp Mental Exercises or Thread Sort 3D?

BrushUp Mental Exercises is rated higher. BrushUp Mental Exercises averages 4.9 out of 5 from 24 ratings, while Thread Sort 3D averages 4.7 from 3 ratings.

### Do BrushUp Mental Exercises or Thread Sort 3D have ads?

Thread Sort 3D shows ads; BrushUp Mental Exercises does not.

### Which is updated more often, BrushUp Mental Exercises or Thread Sort 3D?

BrushUp Mental Exercises ships an update every 23 months, and Thread Sort 3D weekly. Most recently, BrushUp Mental Exercises was updated on November 2, 2026 and Thread Sort 3D on November 5, 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.*