# Ball Stack vs Spot the Digit Challenge

The clearest difference is ads: Ball Stack at none against Spot the Digit Challenge's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Ball Stack ships an update every 3 weeks, Spot the Digit Challenge every 10 days. Both last shipped on October 30, 2026.

## The numbers

| Metric | Ball Stack | Spot the Digit Challenge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Size | 2 MB | 172 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Rufe.org LLC](https://appshunter.io/developer/1683900465) | [PLAYFINITY K.K.](https://appshunter.io/developer/1855856794) |

## What reviewers say

### Ball Stack

[App page](https://appshunter.io/ios/app/ball-stack-color-sort-puzzle/id6470507681)

**In-app purchases:** none


### Spot the Digit Challenge

[App page](https://appshunter.io/ios/app/spot-the-digit-challenge/id6756186742)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Ball Stack free?

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

### Is Spot the Digit Challenge free?

Spot the Digit Challenge is free to download, with no in-app purchases.

### Do Ball Stack or Spot the Digit Challenge have ads?

Spot the Digit Challenge shows ads; Ball Stack does not.

### Which is updated more often, Ball Stack or Spot the Digit Challenge?

Ball Stack ships an update every 3 weeks, and Spot the Digit Challenge every 10 days. Most recently, Ball Stack was updated on October 30, 2026 and Spot the Digit Challenge on October 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.*