# CuBall vs KnotNum

The clearest difference is update cadence: CuBall at every 2 days against KnotNum's every 2 weeks. CuBall also leads on iOS requirement (9.0 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CuBall sells 2 one-off in-app purchases and KnotNum sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

CuBall ships an update every 2 days, KnotNum every 2 weeks. The most recent releases landed on October 13, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | CuBall | KnotNum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/cuball/id1471164071/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 83 MB | 2 MB |
| Requires iOS | **9.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sergey Dubovitsky](https://appshunter.io/developer/1176840932) | [Pavel Gagarin](https://appshunter.io/developer/1535393148) |

## What reviewers say

### CuBall

[App page](https://appshunter.io/ios/app/cuball/id1471164071)

An endless puzzle game where you move a cube to collect balls in a line. Use power crystals and magic spells to overcome challenges. Compete with others globally and improve your focus and logical reasoning.

**Highlights:** Endless puzzle gameplay, Cube movement and ball collection, Power crystals and magic spells, Global leaderboards, Customizable color themes and music, Logical reasoning development

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 2000 Gems | $0.99 | one-time |
| 15000 Gems | $4.99 | one-time |


### KnotNum

[App page](https://appshunter.io/ios/app/knotnum-number-chains/id6786274224)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 200 Coins | $0.99 | one-time |
| Premium | $0.99 | one-time |
| 700 Coins | $2.99 | one-time |
| 1800 Coins | $5.99 | one-time |


## Frequently asked questions

### Is CuBall free?

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

### Is KnotNum free?

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

### Do CuBall or KnotNum have ads?

Neither CuBall nor KnotNum shows ads.

### Which is updated more often, CuBall or KnotNum?

CuBall ships an update every 2 days, and KnotNum every 2 weeks. Most recently, CuBall was updated on October 13, 2026 and KnotNum on October 19, 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.*