# Killer Aid vs Gear combination

The clearest difference is in-app purchases: Killer Aid at none against Gear combination's 1. Killer Aid also leads on ads (none vs shown) and iOS requirement (12.4 vs 15.6). Gear combination's advantage is update cadence (weekly vs every 7 months). On price and device support there is nothing between them.

Both are free to download. Gear combination sells 1 one-off in-app purchase. Killer Aid asks for nothing beyond the download.

Killer Aid ships an update every 7 months, Gear combination weekly. The most recent releases landed on September 19, 2026 and August 23, 2026 respectively.

## The numbers

| Metric | Killer Aid | Gear combination |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (42 ratings)](https://appshunter.io/ios/app/killer-aid/id921229517/reviews)** | — |
| Number of ratings | **42** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | Free | — |
| Size | 1 MB | 26 MB |
| Requires iOS | **12.4** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trevor Butler](https://appshunter.io/developer/921229516) | [akira ohmachi](https://appshunter.io/developer/1338624340) |

## 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


### Gear combination

[App page](https://appshunter.io/ios/app/gear-combination/id6470493924)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is Killer Aid free?

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

### Is Gear combination free?

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

### Do Killer Aid or Gear combination have ads?

Gear combination shows ads; Killer Aid does not.

### Which is updated more often, Killer Aid or Gear combination?

Killer Aid ships an update every 7 months, and Gear combination weekly. Most recently, Killer Aid was updated on September 19, 2026 and Gear combination on August 23, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*