# Killer Aid vs Number Merge

The clearest difference is ads: Killer Aid at none against Number Merge's shown. Killer Aid also leads on update cadence (every 7 months vs every 15 months) and iOS requirement (12.4 vs 15.0). On price, 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.

Killer Aid ships an update every 7 months, Number Merge every 15 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Killer Aid | Number Merge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (43 ratings)](https://appshunter.io/ios/app/killer-aid/id921229517/reviews)** | — |
| Number of ratings | **43** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 7 months** | Every 15 months |
| Monetization | Free | — |
| Size | 1 MB | 27 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trevor Butler](https://appshunter.io/developer/921229516) | [Blossom Labs](https://appshunter.io/developer/1723890403) |

## What reviewers say

### Killer Aid

[App page](https://appshunter.io/ios/app/killer-aid/id921229517)

This app assists players in solving challenging Killer Sudoku puzzles by providing tools to calculate and filter number combinations for cages. It helps identify duplicate numbers and offers a calculator optimized for specific solving strategies.

**Highlights:** Cage combination calculation, Duplicate number highlighting, Filter tools (Exclude, Include AND, Include OR), Optimized calculator for Killer Sudoku, Help and strategy resources

**Features:** macOS Compatibility

**In-app purchases:** none


### Number Merge

[App page](https://appshunter.io/ios/app/number-merge-maths-puzzle/id6499236432)

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

**In-app purchases:** none


## Frequently asked questions

### Is Killer Aid free?

Killer Aid is free to download, with no in-app purchases.

### Is Number Merge free?

Number Merge is free to download, with no in-app purchases.

### Do Killer Aid or Number Merge have ads?

Number Merge shows ads; Killer Aid does not.

### Which is updated more often, Killer Aid or Number Merge?

Killer Aid ships an update every 7 months, and Number Merge every 15 months. Most recently, Killer Aid was updated on November 1, 2026 and Number Merge 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.*