# TDI Tuning — Connect your TDI-Tuning System

> Vehicle performance tuning and community connection via Bluetooth. (iPhone/iPad app by TDI Tuning.)

- Source: https://appshunter.io/ios/app/tdi-tuning/id1377233586 (this page in markdown: same URL + `.md`)
- Developer: [TDI Tuning](https://appshunter.io/developer/1377233585)
- Category: Utilities
- Price: Free
- Rating: 4.20/5 from 5 App Store ratings · 18 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 23 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Japanese, Brazilian Portuguese, Chinese (Simplified, China), European Spanish
- Released: 2018-07-07
- Data updated: 2026-06-09
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/tdi-tuning/id1377233586/reviews.md

## What is TDI Tuning?

Want more power, torque or economy from your vehicle? With the TDI Tuning App, you can decide directly from your driver’s seat. Connect to your TDI-Tuning Bluetooth system to instantly change the performance of your engine and adapt your vehicle to suit any situation.
Join a community of like-minded tuners, show-off your vehicle, and get tips from a world-wide network of car enthusiasts. 

Functionality:
- Connect to your CRTD4 Bluetooth or CRTD4 SENT Bluetooth enabled system.
- Instantly change the performance setting of your vehicle from one of seven custom programs specifically designed for your exact vehicle.
- Set your engine delay timer to activate your system after a pre-determined amount of time.
- Discreet mode- turn off all illumination on your tuning system.
- Turn off your tuning system and revert back to vehicle factory standard.
- Connect with our TDI-Tuning Community.
- Instantly access our support and FAQ pages.

## Key features

- Bluetooth system connection
- Instant performance setting changes
- Seven custom performance programs
- Engine delay timer
- Discreet mode
- Revert to factory settings
- Community access

## Recent user reviews (10 of 18)

All indexed reviews: https://appshunter.io/ios/app/tdi-tuning/id1377233586/reviews.md

### 4/5 — TDI本体と接続できないとなんの操作（アプリの設定とか）もできない仕様を改善してほしい

*2025-05-10, version 2.2.9*

車にTDIを取り付けして使い始めたばかりですが、とりあえず見つかったイマイチポイントを書きます。

・アイコン画像を変えてもすぐには変わらず、しばらくして忘れた頃に変わる（規則性がわからない）
・TDI tuningシステムをオフにした際、「TURNING SYSTEM OFF」（ターニングシステムオフ）と表示されるが、tuningの間違いですか？
・右上のアイコンは本体の表示ランプを消すボタンだが、これで消してしまうと設定を変更してもエンジンを始動しても本体LEDは何も光らなくなるため故障したのかと勘違いしてしまう（仕様だとすれば仕方ないが、、、）
・遅延タイマーは毎回アプリから操作しないと作動しない（暖機運転などのために使うらしいが、毎回毎回アプリからタイマー作動させるのは非常に面倒だし忘れてしまうのでは）

など、少し使っただけですが、あれ？というポイントが出てきました。
たかが1ユーザーの意見ではございますが、改善の材料にでもなれば幸いです。

### 1/5 — wont connect to any phone

*2024-01-25, version 2.2.9*

was working on my iphone, had new upgrade iphone installed app wont connect wont give option to enter bluetooth code and no help from tdi tuning themselves and no app update now for over a year looks like more money making shenanigans from tdi tuning from existing customer

### 2/5 — Connectivity terrible

*2023-11-20, version 2.2.9*

Great box and really works but getting it connected when you upgrade your phone is a nightmare, come on TDI get it sorted!!

### 2/5 — It use to connect easiest on last phone iPhone 13 max

*2023-07-11, version 2.2.9*

Now a new phone and no way of connection on the iPhone 14 max

### 1/5 — Don't bother

*2023-05-04, version 2.2.7*

Used to work now it dosen't, I bought it ford transit custom what ever setting you are on it does not change the drive waste of money

### 1/5 — Bluetooth connectivity

*2023-01-15, version 2.1*

Its not connecting at all, whats the point of paying extra for bluetooth when you can't even connect it. Rubbish quality. Very disappointed

### 1/5 — Never connected

*2022-08-12, version 1.0.5*

Has never connected. No app update in over 2 years.

### 1/5 — Drinks fuel

*2022-05-13, version 1.0.5*

If you want to lose fuel, save money by not buying this and just hammer a hole into your tank.
Wouldn’t even give it 1 star

### 2/5 — iPhone13pro maxで接続できません

*2021-10-17, version 1.0.5*

iPhone11pro max(IOS15.0.2)では問題なくBT接続できていましたが、iPhone13(同じOS)でアプリ上のペアリングがうまくいきませんでした。(コントロール画面に遷移しない)

### 4/5 — 横向き画面に対応してもらえると

*2021-08-25, version 1.0.5*

iPadを普段車では横向きで使っているが、アプリは縦向きのみの様子。
横向きにも対応してもらえれば…

## Frequently asked questions about TDI Tuning

### What vehicles is TDI Tuning compatible with?

TDI Tuning is designed to work with vehicles that have a CRTD4 Bluetooth or CRTD4 SENT Bluetooth enabled system. The app offers seven custom programs specifically designed for your exact vehicle model.

### How do I change my vehicle's performance with TDI Tuning?

You can instantly change your vehicle's performance settings by connecting to your TDI-Tuning Bluetooth system through the app. You can select from one of seven custom programs designed for your specific vehicle.

### Can I revert my vehicle to factory settings using TDI Tuning?

Yes, you can turn off your tuning system and revert your vehicle back to its factory standard settings directly through the app.

### Does TDI Tuning have ads?

No, TDI Tuning does not contain advertisements. The app is free to download and use without any ad interruptions.

### What is the engine delay timer in TDI Tuning?

The engine delay timer allows you to set a pre-determined amount of time after which your TDI-Tuning system will activate. This feature helps manage system engagement.

### How can I get support for TDI Tuning?

You can instantly access support and FAQ pages directly within the TDI Tuning app. The app also connects you to a community for additional tips and assistance.

### What is the age rating for TDI Tuning?

TDI Tuning has an age rating of 4+. This indicates it is suitable for a wide range of users, though its primary functionality is for vehicle owners.

### How often is TDI Tuning updated?

The latest version of TDI Tuning is 2.3.4, which was last updated on March 19, 2026. This indicates a recent update, suggesting ongoing development and support.

## Version history (last 5 releases)

### 2.3.4 — 2026-03-19

Added support for new hardware with improved Bluetooth connectivity.

### 2.2.9 — 2023-07-03

Fixed bug with remote updating

### 2.2.7 — 2023-02-28

Support for updated firmware and bug fixes

### 2.1 — 2022-09-22

Improvements:
-Update to support Bug Fixes
-Additional Languages and New Apple Technologies.

### 2.0 — 2022-09-12

Improvements:
-Update to support Bug Fixes
-Additional Languages and New Apple Technologies.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-09.*