# Java Diesel vs Master Parts

Java Diesel and Master Parts are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Java Diesel ships an update every 4 months, Master Parts every 3 months. The most recent releases landed on May 18, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Java Diesel | Master Parts |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 4 months | **Every 3 months** |
| Size | 148 MB | 83 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Java Diesel LTDA](https://appshunter.io/developer/1454809452) | [MWM Motores](https://appshunter.io/developer/1733272159) |

## What reviewers say

### Java Diesel

[App page](https://appshunter.io/ios/app/java-diesel-catalogo/id1454809453)

**Features:** macOS Compatibility

**In-app purchases:** none


### Master Parts

[App page](https://appshunter.io/ios/app/master-parts/id6478697425)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Java Diesel free?

Java Diesel is free to download, with no in-app purchases.

### Is Master Parts free?

Master Parts is free to download, with no in-app purchases.

### Do Java Diesel or Master Parts have ads?

Both Java Diesel and Master Parts show ads.

### Which is updated more often, Java Diesel or Master Parts?

Java Diesel ships an update every 4 months, and Master Parts every 3 months. Most recently, Java Diesel was updated on May 18, 2026 and Master Parts on September 16, 2026.

---

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