The app calculates final drive ratio and rollout for radio control cars. Users can select cars by manufacturer and model, inputting pinion and spur gear sizes.
by David Mills★ 4.525 ratingsSports$2.99Data updated 2026-09-19
Create realistic for bikes, e-scooters, or cars using GPS and accelerometer data. Adjust sound based on speed and pedaling. Simulate gear shifts for enhanced realism. Share custom sound profiles.
Calculate ratios and visualize speed-cadence graphs
Calculate ratios for bicycles with external gearboxes. Input chainwheel, sprocket, and tire sizes to generate speed-cadence and graphs. Simulate optimal ratios by toggling display settings for outer and inner gears.
Calculate proportions using direct and inverse methods. Input known values to find unknowns in equations like "If X Foo equals Y bla, then Z Foo equals [?] bla". Solve for price, quantity, or other proportional relationships.
Calculate by pressing start when the ball is released and stop when caught. history of all pitches. Share results via Twitter or email. Switch between imperial and metric units. Supports , , and little league.
The app calculates relative humidity or dew point based on air temperature. Users can determine the dry bulb temperature, relative humidity percentage, or dew point temperature by inputting two known values.
The app provides engine sounds from over 190 sports cars across 35 manufacturers. Users can experience the sounds of vehicles from brands like Ferrari, Porsche, and Lamborghini.
Helps users manage their obstacle course racing calendar. It lists events from international brands to local races. Users can plan their schedule, access event details, and link directly to any race they want to join.
Calculate gearbox ratios interactively and dynamically.
The app provides tools for calculating gearbox ratios. Users can design gear trains using drag and drop or explore planetary gear sets with interactive animations and ratio calculations.
The app calculates resistor values for circuit design using the Timer IC 555. Users input frequency, duty ratio, and C1 value, then touch calculate to see resistor values.