# bootmod3 vs BACDoor™

The clearest difference is rating: bootmod3 at 4.9 against BACDoor™'s 3.5. bootmod3 also leads on update cadence (every 5 days vs every 4 months) and ratings volume (1.8K vs 6). BACDoor™'s advantage is monetization model (free vs paid) and iOS requirement (8.0 vs 15.0). 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.

bootmod3 holds the better App Store score, 4.9 against 3.5. That said, the two scores are not equally well evidenced: bootmod3 has 1.8K ratings behind it against 6, so its average is the more settled of the two.

bootmod3 ships an update every 5 days, BACDoor™ every 4 months. The most recent releases landed on October 1, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | bootmod3 | BACDoor™ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (1.8K ratings)](https://appshunter.io/ios/app/bootmod3/id1170348811/reviews)** | [3.5 (6 ratings)](https://appshunter.io/ios/app/bacdoor/id1229140415/reviews) |
| Number of ratings | **1.8K** | 6 |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 4 months |
| Monetization | Paid | **Free** |
| Size | 178 MB | 92 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PRO TUNING FREAKS INC.](https://appshunter.io/developer/1170348810) | [Accelerated Systems Inc.](https://appshunter.io/developer/1229140414) |

## What reviewers say

### bootmod3

[App page](https://appshunter.io/ios/app/bootmod3/id1170348811)

This platform enables users to unlock the full performance potential of their BMW, Mini, and Toyota Supra vehicles by flashing the factory ECU and TCU. It offers features like map switching, flex fuel tuning, and anti-lag, allowing for significant horsepower gains and custom performance adjustments.

**Highlights:** ECU and TCU flashing, Map switching via steering wheel, Flex Fuel tuning, Anti-Lag functionality, Live monitoring and datalogging, Customizable map editor

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use app
- 🚀 Fast flashing and tuning
- 💪 Excellent performance gains
- 🔧 Great customization and tuning options
- ⭐ Fantastic customer support

**What reviewers complain about**

- 🐛 Occasional connectivity issues
- 🔍 Difficulty with certain features (e.g. burbles, code clearing)
- 🤔 Compatibility problems with newer iOS versions
- 🧰 Concerns about bricking ECU

**Reported bugs**

- App crashes or freezes after updates
- Inability to connect to car after iOS updates
- Trouble with flashing and tune loading

**Requested features**

- Add support for more BMW models
- Improve app UI/UX for better usability
- Expand customization options (e.g. cold start, map selection)
- Enhance data logging and diagnostics


### BACDoor™

[App page](https://appshunter.io/ios/app/bacdoor/id1229140415)

This utility app allows ASI customers with a support account to fine-tune Bluetooth controllers directly from their mobile device. It offers features like parameter adjustment, file management, firmware updates, and data logging without needing a PC connection.

**Highlights:** Poll and adjust controller parameters, Upload and save parameter files, Bootload firmware to controllers, Datalog parameters, Customizable app layouts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is bootmod3 free?

bootmod3 is free to download, with no in-app purchases.

### Is BACDoor™ free?

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

### Which has better reviews, bootmod3 or BACDoor™?

bootmod3 is rated higher. bootmod3 averages 4.9 out of 5 from 1.8K ratings, while BACDoor™ averages 3.5 from 6 ratings.

### Do bootmod3 or BACDoor™ have ads?

Neither bootmod3 nor BACDoor™ shows ads.

### Which is updated more often, bootmod3 or BACDoor™?

bootmod3 ships an update every 5 days, and BACDoor™ every 4 months. Most recently, bootmod3 was updated on October 1, 2026 and BACDoor™ on June 1, 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.*