About AutoTech
AutoTech is an automotive calculator that offers the mechanic, technician or enthusiast quick computation of 45+ formulas in the areas of aerodynamics, chassis, drivetrain, engine, performance, suspension, and tires....
AutoTech is an automotive calculator that offers the mechanic, technician or enthusiast quick computation of 45+ formulas in the areas of aerodynamics, chassis, drivetrain, engine, performance, suspension, and tires. Supports both U.S. and metric units.
Version History New Suspension Calculations: - Angle Corrected Spring Rate - Stacked Spring Rate Age rating update required by Apple. 1.6 Jan 7 New Drivetrain Calculation: - RPM (from speed, axle gear ratio, transmission gear ratio, and tire diameter) New Engine Calculations: - Valve Spring Open Pressure - Valve Spring Rate Fixed an issue in the Unit Converter where Weight was not being shown as an option. 1.5 04/11/2023 Dark mode support. New Drivetrain section that includes: - Axle Speed - Driveshaft Critical Speed - Gear Ratio - Rear Wheel Torque - RPM After Shift New Engine Calculations: - Deck Height Clearance - Valve Curtain Area New Density category in Unit Converter. 1.4 08/26/2020 Modernized user interface. New engine calculation: Supercharger Temperature Gain. Additional information provided for: - Brake Mean Effective Pressure - Effective Drive Ratio - Equivalent Drive Ratio - Power Loss at Elevation 1.3 10/15/2016 Four new calculations: - Aerodynamic Lift-Induced Drag - Injector Flow Rate - Port Velocity - Wheel Rate Additional information provided for: - Combustion Chamber Volume - Piston Speed - Tire Size Supports larger 4-inch screen on iPhone 5 and iPod touch. Other minor enhancements and internal improvements. 1.2 09/09/2013 Two new engine calculations: - Optimum Intake Runner Size - Peak Torque RPM Now includes a unit converter! Added a tire speed rating chart. Fixed an issue with iOS 5. 1.1 10/20/2011 1.0 12/21/2010
Previous Versions
Here you can find the changelog of AutoTech since it was posted on our website on 2016-10-29 07:07:00.
The latest version is 1.6 and it was updated on 2026-06-10 05:26:06. See below the changes in each version.
AutoTech version 1.6
Updated At: 2026-06-10
Changes: Version History New Suspension Calculations:
- Angle Corrected Spring Rate
- Stacked Spring Rate
Age rating update required by Apple. 1.6 Jan 7 New Drivetrain Calculation:
- RPM (from speed, axle gear ratio, transmission gear ratio, and tire diameter)
New Engine Calculations:
- Valve Spring Open Pressure
- Valve Spring Rate
Fixed an issue in the Unit Converter where Weight was not being shown as an option. 1.5 04/11/2023 Dark mode support.
New Drivetrain section that includes:
- Axle Speed
- Driveshaft Critical Speed
- Gear Ratio
- Rear Wheel Torque
- RPM After Shift
New Engine Calculations:
- Deck Height Clearance
- Valve Curtain Area
New Density category in Unit Converter. 1.4 08/26/2020 Modernized user interface.
New engine calculation: Supercharger Temperature Gain.
Additional information provided for:
- Brake Mean Effective Pressure
- Effective Drive Ratio
- Equivalent Drive Ratio
- Power Loss at Elevation 1.3 10/15/2016 Four new calculations:
- Aerodynamic Lift-Induced Drag
- Injector Flow Rate
- Port Velocity
- Wheel Rate
Additional information provided for:
- Combustion Chamber Volume
- Piston Speed
- Tire Size
Supports larger 4-inch screen on iPhone 5 and iPod touch.
Other minor enhancements and internal improvements. 1.2 09/09/2013 Two new engine calculations:
- Optimum Intake Runner Size
- Peak Torque RPM
Now includes a unit converter!
Added a tire speed rating chart.
Fixed an issue with iOS 5. 1.1 10/20/2011 1.0 12/21/2010
AutoTech version 1.6
Updated At: 2026-01-07
Changes: New Suspension Calculations:
- Angle Corrected Spring Rate
- Stacked Spring Rate
Age rating update required by Apple.
AutoTech version 1.5
Updated At: 2023-04-11
Changes: Apr 11, 2023
Version 1.5
New Drivetrain Calculation:
- RPM (from speed, axle gear ratio, transmission gear ratio, and tire diameter)
New Engine Calculations:
- Valve Spring Open Pressure
- Valve Spring Rate
Fixed an issue in the Unit Converter where Weight was not being shown as an option.
AutoTech version 1.4
Updated At: 2020-08-26
Changes: Aug 26, 2020 Version 1.4
Dark mode support.
New Drivetrain section that includes:
- Axle Speed
- Driveshaft Critical Speed
- Gear Ratio
- Rear Wheel Torque
- RPM After Shift
New Engine Calculations:
- Deck Height Clearance
- Valve Curtain Area
New Density category in Unit Converter.
AutoTech version 1.3
Updated At: 2016-10-15
Changes: Oct 15, 2016 Version 1.3
Modernized user interface.
New engine calculation: Supercharger Temperature Gain.
Additional information provided for:
- Brake Mean Effective Pressure
- Effective Drive Ratio
- Equivalent Drive Ratio
- Power Loss at Elevation
AutoTech version 1.3
Updated At: 2010-12-22
Disclaimer
Official App Store Link
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