# ECUconnect vs BK400

The clearest difference is update cadence: BK400 at weekly against ECUconnect's every 5 months. BK400 also leads on iOS requirement (15.0 vs 18.2). 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.

ECUconnect ships an update every 5 months, BK400 weekly. The most recent releases landed on December 8, 2025 and September 24, 2026 respectively.

## The numbers

| Metric | ECUconnect | BK400 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Size | 13 MB | 21 MB |
| Requires iOS | 18.2 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TPE Europe GmbH](https://appshunter.io/developer/1561470951) | [祖策 谢](https://appshunter.io/developer/983519195) |

## What reviewers say

### ECUconnect

[App page](https://appshunter.io/ios/app/ecuconnect/id6502191237)

**In-app purchases:** none


### BK400

[App page](https://appshunter.io/ios/app/bk400/id6760681499)

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

**In-app purchases:** none


## Frequently asked questions

### Is ECUconnect free?

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

### Is BK400 free?

BK400 is free to download, with no in-app purchases.

### Do ECUconnect or BK400 have ads?

Neither ECUconnect nor BK400 shows ads.

### Which is updated more often, ECUconnect or BK400?

ECUconnect ships an update every 5 months, and BK400 weekly. Most recently, ECUconnect was updated on December 8, 2025 and BK400 on September 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.*