# Assembly Lines vs Sharpen Knife Run

The clearest difference is in-app purchases: Assembly Lines at none against Sharpen Knife Run's 3. Assembly Lines also leads on update cadence (every 2 days vs weekly) and iOS requirement (10.0 vs 12.0). Sharpen Knife Run's advantage is ratings volume (1.3K vs 10). On price, rating, ads and device support there is nothing between them.

Both are free to download. Sharpen Knife Run sells 3 one-off in-app purchases. Assembly Lines asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Assembly Lines against 4.6 for Sharpen Knife Run. That said, the two scores are not equally well evidenced: Sharpen Knife Run has 1.3K ratings behind it against 10, so its average is the more settled of the two.

Assembly Lines ships an update every 2 days, Sharpen Knife Run weekly. Both last shipped on November 3, 2026.

## The numbers

| Metric | Assembly Lines | Sharpen Knife Run |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (10 ratings)](https://appshunter.io/ios/app/assembly-lines/id1623901076/reviews)** | [4.6 (1.3K ratings)](https://appshunter.io/ios/app/sharpen-knife-run/id6448621102/reviews) |
| Number of ratings | 10 | **1.3K** |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 163 MB | 370 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Clap Clap Games](https://appshunter.io/developer/1435219840) | [SUPERSONIC STUDIOS LTD](https://appshunter.io/developer/1499845738) |

## What reviewers say

### Assembly Lines

[App page](https://appshunter.io/ios/app/assembly-lines/id1623901076)

Design and assemble custom cars by selecting the right parts to increase their value. Race them on a ramp and avoid mistakes to maximize your earnings. Unlock new levels as you progress.

**Highlights:** Assemble cool cars, Change parts and bits, Increase car value, Unlock new levels, Race on a ramp

**In-app purchases:** none


### Sharpen Knife Run

[App page](https://appshunter.io/ios/app/sharpen-knife-run/id6448621102)

Control a knife, sharpening it as you go to cut through obstacles. Experience a fun and easy-to-operate gameplay experience.

**Highlights:** Sharpen knife, Cut objects, Obstacle course, Easy controls, Fun gameplay

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $2.99 | one-time |
| No Ads + 8,000 | $3.99 | one-time |
| No Ads + 20,000 + Knifves Pack | $5.99 | one-time |

**What reviewers like**

- 🤩 Great game
- 😌 Calms anxiety

**What reviewers complain about**

- 🤬 Too many ads
- 🤯 Game-breaking glitches
- 😞 Boring after a while
- 😠 Fake previews

**Reported bugs**

- Game crashes after update
- Booster and gate glitches
- Game won't load

**Requested features**

- More knives past level 20
- Increase difficulty as you progress


## Frequently asked questions

### Is Assembly Lines free?

Assembly Lines is free to download, with no in-app purchases.

### Is Sharpen Knife Run free?

Sharpen Knife Run is free to download, with in-app purchases available.

### Which has better reviews, Assembly Lines or Sharpen Knife Run?

Assembly Lines is rated higher. Assembly Lines averages 4.7 out of 5 from 10 ratings, while Sharpen Knife Run averages 4.6 from 1.3K ratings.

### Do Assembly Lines or Sharpen Knife Run have ads?

Both Assembly Lines and Sharpen Knife Run show ads.

### Which is updated more often, Assembly Lines or Sharpen Knife Run?

Assembly Lines ships an update every 2 days, and Sharpen Knife Run weekly. Most recently, Assembly Lines was updated on November 3, 2026 and Sharpen Knife Run on November 3, 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.*