# Diesel+ vs Casto Flasher

The clearest difference is update cadence: Diesel+ at weekly against Casto Flasher's every 3 weeks. Casto Flasher's advantage is iOS requirement (16.4 vs 27.0). On price, ads, 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.

Diesel+ ships an update weekly, Casto Flasher every 3 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Diesel+ | Casto Flasher |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/diesel-plus/id6474500884/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free | — |
| Size | 17 MB | 66 MB |
| Requires iOS | 27.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [TPE Europe GmbH](https://appshunter.io/developer/1561470951) | [ZL Softare GmbH](https://appshunter.io/developer/6788573355) |

## What reviewers say

### Diesel+

[App page](https://appshunter.io/ios/app/diesel-plus/id6474500884)

Enhance the performance of your Volkswagen Group or BMW diesel vehicle with this app. Achieve new levels of power and efficiency through manufacturer-level tuning, developed and tested by automotive industry experts for safe and uncompromising results.

**Highlights:** Performance increase for diesel vehicles, Manufacturer-level tuning standards, Developed and tested for specific vehicles, Safe and uncompromising performance enhancement, iPhone control

**In-app purchases:** none


### Casto Flasher

[App page](https://appshunter.io/ios/app/casto-flasher/id6797246314)

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

**In-app purchases:** none


## Frequently asked questions

### Is Diesel+ free?

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

### Is Casto Flasher free?

Casto Flasher is free to download, with no in-app purchases.

### Do Diesel+ or Casto Flasher have ads?

Neither Diesel+ nor Casto Flasher shows ads.

### Which is updated more often, Diesel+ or Casto Flasher?

Diesel+ ships an update weekly, and Casto Flasher every 3 weeks. Most recently, Diesel+ was updated on October 27, 2026 and Casto Flasher on October 24, 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.*