# Light Bulb Jam vs Ultimate Sudoku App

The clearest difference is ads: Ultimate Sudoku App at none against Light Bulb Jam's shown. Light Bulb Jam's advantage is iOS requirement (12.0 vs 16.4). 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.

Light Bulb Jam ships an update every 2 weeks, Ultimate Sudoku App every 6 days. Both last shipped on November 8, 2026.

## The numbers

| Metric | Light Bulb Jam | Ultimate Sudoku App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 6 days** |
| Size | 103 MB | 40 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mousetap LTD](https://appshunter.io/developer/1714251771) | [Michele Yin](https://appshunter.io/developer/1802479962) |

## What reviewers say

### Light Bulb Jam

[App page](https://appshunter.io/ios/app/light-bulb-jam/id6737853617)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ultimate Sudoku App

[App page](https://appshunter.io/ios/app/ultimate-sudoku-app/id6743371040)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Light Bulb Jam free?

Light Bulb Jam is free to download, with no in-app purchases.

### Is Ultimate Sudoku App free?

Ultimate Sudoku App is free to download, with no in-app purchases.

### Do Light Bulb Jam or Ultimate Sudoku App have ads?

Light Bulb Jam shows ads; Ultimate Sudoku App does not.

### Which is updated more often, Light Bulb Jam or Ultimate Sudoku App?

Light Bulb Jam ships an update every 2 weeks, and Ultimate Sudoku App every 6 days. Most recently, Light Bulb Jam was updated on November 8, 2026 and Ultimate Sudoku App on November 8, 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.*