# Dyno Chart - OBD II Engine Performance Tool

> Vehicle engine performance analysis tool using OBD II data. (iPhone/iPad app by K SOLUTION LLC.)

- Source: https://appshunter.io/ios/app/dyno-chart-obd-ii-engine-performance-tool/id602676538 (this page in markdown: same URL + `.md`)
- Developer: [K SOLUTION LLC](https://appshunter.io/developer/289670447)
- Category: Sports, Utilities
- Price: Free with in-app purchases
- Rating: 1.20/5 from 6 App Store ratings · 20 written reviews indexed
- Age rating: 4+
- Requires: iOS 7.0 · 9 MB
- Languages: American English
- Released: 2013-02-26
- Data updated: 2026-08-25
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/dyno-chart-obd-ii-engine-performance-tool/id602676538/reviews.md

## What is Dyno Chart?

Dyno Chart is vehicle engine performance evaluation tool, which provides you the information of max power and torque vs RPM. Dyno Chart app uses OBD II interface on your vehicle to collect sensor data and build the chart. Please follow the app instruction for compatibility check before you purchase and unlock the in-app chart function.

The app needs an ELM compatible Wi-Fi or Bluetooth Low Energy (for iPhone4s and later)  adapter to work.

You can check Developer WebSite for Adapter Guide: http://www.outdoor-apps.com/enginelink.html

Drop us an email for any suggestions/questions you may have at support@ksolution.org. We will answer.

## Key features

- Max power and torque vs RPM charts
- OBD II sensor data collection
- Vehicle compatibility check
- ELM Wi-Fi/Bluetooth LE adapter support
- In-app chart function unlock

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Dyno Chart Unlock | $4.99 | one-time |


## Recent user reviews (10 of 20)

All indexed reviews: https://appshunter.io/ios/app/dyno-chart-obd-ii-engine-performance-tool/id602676538/reviews.md

### 5/5 — 📡

*2024-07-13*

GOOD！

### 1/5 — Unusable

*2024-05-12*

On iPhone 14 Pro, app is 90° tilted (half screen), it is completely unusable right now

### 1/5 — Не понравилось

*2019-03-18*

Не работают графики.

### 1/5 — Doesn’t show hp

*2018-11-10*

Under engine performance it just shows good...

### 4/5 — Super App

*2018-02-19*

Der Test läuft super. Leider kann man keine Dieselfahrzeuge auswählen wo’s zu einer Abweichung führt. Bitte Diesel mit einfügen dann macht es Sinn für alle Dieselfahrzeuge.

### 4/5 — Bien

*2016-01-08*

Répond ce pour lequel je l'ai acheté
Toutefois faite vite une possibilité d'impression du graphe
Merci

### 1/5 — Doesn't work on Audi

*2015-11-20*

Other apps have features for free that work in other apps (ie MPG) but say they are unavailable from car in the paid version of this app.

### 1/5 — Not ELM 327 Bluetooth compatible

*2015-10-30*

Not Bluetooth compatible only wifi

### 1/5 — Rubbish

*2015-09-05*

Thought I would give this try and it is rubbish. Did 10 runs from the same starting position. The torque measured was between 180 to over 350. Horse power was not any better. One run the readings was 90 horsepower and 270 torque. Look for better options.

### 1/5 — Doesn worth a try :(

*2015-04-26*

Costly

## Frequently asked questions about Dyno Chart

### What is Dyno Chart?

Dyno Chart is a tool that evaluates vehicle engine performance by collecting sensor data via an OBD II interface. It displays maximum power and torque in relation to RPM.

### What hardware do I need for Dyno Chart?

You will need an ELM compatible Wi-Fi or Bluetooth Low Energy adapter to connect to your vehicle's OBD II port. The app provides instructions for compatibility checks.

### Is Dyno Chart free to use?

The base application is free to download and use for basic functions. However, unlocking the full in-app chart functionality requires an in-app purchase.

### What devices does Dyno Chart support?

Dyno Chart is supported on iPhone and iPod devices. For iPhone 4s and later, Bluetooth Low Energy adapters are supported.

### How often is Dyno Chart updated?

The app was last updated on October 8, 2014, to version 2.1. This indicates a less frequent update schedule.

### What is the user rating for Dyno Chart?

Dyno Chart has a user rating of 1.2 stars from 6 ratings, suggesting a low level of user satisfaction based on available data.

### Does Dyno Chart have ads?

No, Dyno Chart does not contain advertisements. The app is ad-free.

### Where can I find help or suggestions for Dyno Chart?

You can contact the developers directly via email at support@ksolution.org for any suggestions or questions you may have regarding Dyno Chart.

## Version history (last 5 releases)

### 2.1 — 2014-10-08

This app has been updated by Apple to display the Apple Watch app icon.

Code optimization.

### 2.0 — 2013-09-12

Code optimization to improve refresh rate.

### 1.2 — 2013-04-05

Code optimization.

### 1.1 — 2013-03-15

Improve user interface.

### 1.0 — 2013-02-26

No release notes.

## Apps similar to Dyno Chart

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [CarTest - Performance Tester](https://appshunter.io/ios/app/cartest-performance-tester/id1534136951) | 4.2 (13) | Free | Sports |
| [PerfExpert](https://appshunter.io/ios/app/perfexpert/id549390700) | 3.7 (12) | $8.99 | Sports |
| [PerfectPower](https://appshunter.io/ios/app/perfectpower/id539294038) | — | $33.00 | Sports |
| [RPM Dot by SparkEVO](https://appshunter.io/ios/app/rpm-dot-by-sparkevo/id6471539087) | — | Free | Sports |
| [TORQUE OBD2 LITE - Car Check](https://appshunter.io/ios/app/torque-obd2-lite-car-check/id6738406150) | 1.8 (10) | Free | Sports |
| [DragRacing – Real Drag Timer](https://appshunter.io/ios/app/dragracing-real-drag-timer/id1581306865) | 4.1 (15) | Free | Sports |

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All apps by K SOLUTION LLC: https://appshunter.io/developer/289670447

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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 2026-08-25.*