Measure vehicle performance with high precision using GPS and OBD sensors. Test acceleration and deceleration across custom speed ranges, analyze detailed results, and store data locally. Supports external sensors for enhanced accuracy.
25.1.0
June 24, 2026
User Interface - added option to scroll buttons in case available buttons do not fit screen width Sensor support - added support for Haze GNSS sensors - added OBD support for Hybrid battery SoC plus tank gadget allowing to toggle between tank and battery level - added heading support for NMEA sensors w/o RMC (like Columbus) - fixed a scripting error in RaceboxMini sensor implementation - made hundreds seconds handling for Racebox Mini more robust - fixed a bug in CSV headers
MoreHarry's Dyno is a high-precision app for measuring vehicle performance. It uses GPS and OBD sensor input to test acceleration and deceleration across custom speed ranges, allowing for detailed analysis of results.
Yes, for short speed ranges, high-powered vehicles, and the highest precision, external GPS or OBD sensors can be connected. OBD adapters are preferable as they provide instant speed changes.
Results can be compared and analyzed in detail. The app features a two-cursor mode for inspecting subranges of recorded data, such as 80 to 120 km/h within a 0 to 200 km/h test.
Data is stored locally and can be filtered by speed range and vehicle used. The app also allows data to be exported to various formats for further analysis or sharing.
Harry's Dyno is a paid application, priced at $3.99. This one-time purchase grants access to its full performance measuring capabilities.
The app has an age rating of 4+, indicating it is generally suitable for younger users. However, its primary functionality is for adult vehicle enthusiasts.
The app was last updated on May 6, 2025, with version 25.0.0. This indicates active development and regular updates to improve functionality and compatibility.
No, Harry's Dyno does not contain advertisements. As a paid application, it offers an ad-free experience for its users.
