# TrackDyno — Dyno your car while you drive! > Estimate vehicle performance metrics and lap times using phone sensors. (iPhone/iPad app by Kristopher Ruble.) - Source: https://appshunter.io/ios/app/trackdyno/id6779360467 (this page in markdown: same URL + `.md`) - Developer: [Kristopher Ruble](https://appshunter.io/developer/6779360469) - Category: Utilities - Price: $14.99 - Rating: 3.67/5 from 3 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 17.0 · 8 MB - Languages: American English - Released: 2026-06-18 - Data updated: 2026-10-28 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/trackdyno/id6779360467/reviews.md ## What is TrackDyno? TrackDyno is a breakthrough app for automotive enthusiasts! Your mobile device can now act as a dynamometer, performance timer, and lap timer, as well as GPS speedometer. Horsepower and torque can be calculated using nothing but your phone's built in sensors! It's the only performance app you'll ever need! No cables, no clunky box mounted in your car. Nothing to plug in, nothing extra to buy. TrackDyno now offers support for most popular OBD-II over BLE devices. This allows TrackDyno to see speed, RPM throttle position, and verify gear ratio. As a result, using OBD-II over BLE will unlock greater accuracy during dyno runs (can now verify RPM and speed data, as well as auto-start and auto-stop dyno runs), and telemetry during lap sessions, as well as live replay with sector overviews! New features, support, updates always rolling out as they are developed. ## Key features - Estimate HP & TQ ratings - Calculate acceleration times (0-60, 0-100) - GPS guided lap timer - Uses phone's built-in sensors - No extra hardware required ## Is TrackDyno safe? Not enough ratings yet to assess TrackDyno. ## Is TrackDyno legit? TrackDyno has limited verification signals. The AppsHunter Legitimacy Score for TrackDyno is 58 out of 100 points across 7 verification signals from App Store and developer data. ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/trackdyno/id6779360467/reviews.md ### 1/5 — Junk *2026-10-14* Absolutely zero real time or anywhere near close data. I have now made 18 poles and every one of them has been different. Nothing near realistic I have tried every single option available and setting tells me my car has 1100 foot pounds of torque with 40 hp probably the biggest waste of my money I’ve ever spent. **Developer response:** In the settings you shared, the gear fields already include the 4.10 final drive: 13.77, 8.18, 5.47, 4.11 and 2.79. The app multiplies each gear by the final drive you enter, so it treats 1st gear as about 56:1 instead of about 13.7:1, and that throws off the torque figures. The gear fields need the transmission’s own ratios so the final drive is applied only once. For a 1994 Mustang GT with the T-5, enter 3.35, 1.99, 1.33, 1.00 and 0.68, with 4.10 as the final drive. ### 5/5 — This is a game changer *2026-06-26* This is the only app I’ve even found that can actually calculate your cars horsepower and not need other hardware, pretty cool! Seems to be pretty accurate and stable. Overall I’m very happy with it! ## Frequently asked questions about TrackDyno ### What is TrackDyno? TrackDyno is a paid utility app that estimates your vehicle's performance statistics, such as horsepower, torque, and acceleration times, using your phone's built-in sensors. It also includes a GPS-guided lap timer for track use. ### How does TrackDyno estimate performance metrics? TrackDyno utilizes your phone's internal sensors combined with advanced mathematical algorithms to calculate estimated horsepower, torque, and various acceleration times like 0-60 mph and quarter-mile times. ### Does TrackDyno require any extra hardware? No, TrackDyno is designed to work solely with your iOS device's existing sensors. There are no additional cables or hardware purchases necessary to use its performance tracking features. ### Can TrackDyno be used for off-road vehicles? Yes, TrackDyno's GPS-guided lap timer makes it suitable for use with ATVs, dirt bikes, side-by-sides, and other off-road vehicles during track sessions. ### What devices does TrackDyno support? TrackDyno is available for iPhone and iPad devices, running on iOS. ### What is the price of TrackDyno? TrackDyno is a paid application priced at $12.99. There are no in-app purchases or subscriptions required. ### How often is TrackDyno updated? New features, support, and updates for TrackDyno are continuously rolled out as they are developed, ensuring the app is regularly improved. ### What is the age rating for TrackDyno? TrackDyno has an age rating of 4+, making it suitable for a wide range of users. ## Version history (last 3 releases) ### 1.2 — 2026-10-23 Added support for iPhone Duo display configurations. Added vehicle setup assistant. Tightened up parameters for greater dyno run accuracy. Minor tweaks and bug fixes. ### 1.1 — 2026-08-31 Added support for ODB-II over BLE 4.0 - this allows greater accuracy in calculating rpm, verifying speed, and verifying gear ratio. Added throttle calibration to vehicle page for use with OBD-II, this allows the app to map 0-100% based on pedal voltage/PID. Added auto start/stop run recording in dyno run page. Added live dyno reading in dyno run page. Added live replay of laps to track timer, complete with telemetry when using OBD-II. Revised track timer to include more intuitive start/stop points, sectors, as well as track save/load page. Revised dyno runs to automatically record the relevant acceleration splits to your run. Revised "history" tab to include acceleration runs as well as track laps/run. Bug fixes, UI tweaks, vehicle and settings changes. ### 1.0 — 2026-06-19 No release notes. --- *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 2026-10-28.*