# Tune Handbook: ECU Tuning — Learn ECU tuning, step by step

> Learn ECU tuning, step by step (iPhone/iPad app by Chris Burchett.)

- Source: https://appshunter.io/ios/app/tune-handbook-ecu-tuning/id6821547562 (this page in markdown: same URL + `.md`)
- Developer: [Chris Burchett](https://appshunter.io/developer/1262824383)
- Category: Education, Reference
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 14.0 · 160 MB
- Languages: American English
- Released: 2026-10-23
- Data updated: 2026-10-25

## What is Tune Handbook?

A hands-on handbook for people who tune engines. It starts at how an engine makes power and goes all the way to speed density, MAF and VE calibration, idle, spark, torque management and cam swaps, with real parameter names, worked numbers and the mistakes that cost people engines.

WHAT YOU GET
- 79 in-depth lessons across 19 chapters: fuel, ignition and knock, datalogging, boost, E85 and flex fuel, modern torque-based ECUs, troubleshooting and advanced calibration
- Platform guides: LS with OS-section details, speed density and DTCs, BMW, Subaru, Honda, and standalone ECUs such as Holley and Speeduino
- Narrated lessons you can listen to while you work, with the spoken word highlighted on screen
- Animated diagrams that show how it works
- Practice questions with nudges, explanations and spaced review, plus levels and streaks
- Calculators: lambda and AFR, injector duty and sizing, airflow, speed density, power and torque, and more
- A gear list of the tools worth owning

FREE TO START, ONE PURCHASE TO UNLOCK
The first chapters and one narrated lesson are free. Tune Handbook Pro is a single one-time purchase of $29.99 that unlocks every chapter, narration on every lesson and every calculator, and removes ads. No subscription. The free version shows ads.

PRIVATE
No account. Your progress stays on your device.

Gear links go to Amazon and we may earn a commission on qualifying purchases.

Educational content only. Tuning can damage engines and may be illegal on public roads. Tune Handbook does not connect to or modify any vehicle. You are responsible for what you do with it.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Tune Handbook Pro | $29.99 | one-time |


## Is Tune Handbook safe?

Not enough ratings yet to assess Tune Handbook.

## Is Tune Handbook legit?

Tune Handbook: ECU Tuning appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Tune Handbook is 75 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-10-23

No release notes.

## More apps by Chris Burchett

- [Kings-Gold](https://appshunter.io/ios/app/kings-gold/id1262925791)
- [Wrong Way - The Game](https://appshunter.io/ios/app/wrong-way-the-game/id1263739040)
- [Marble Madness - The Game](https://appshunter.io/ios/app/marble-madness-the-game/id1264884711)
- [BargainBuddy: Deals & Savings](https://appshunter.io/ios/app/bargainbuddy-deals-and-savings/id6761879059)
- [Cipher AI: Private LLM Chat](https://appshunter.io/ios/app/cipher-ai-private-llm-chat/id6767926967)
- [Skylark Social](https://appshunter.io/ios/app/skylark-social/id6810085347)

All apps by Chris Burchett: https://appshunter.io/developer/1262824383

---

*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 2026-10-25.*