Apps Like Ratio Calc! for iPhone and iPad
Radio control car ratio calculator tool.
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.
Ratio Calc! screenshots
Ranked alternatives
Showing 281–300 of 1,000 ranked alternatives.

SimFly Pad
Chongqing SeeingSky Network Technology Co., ltd
Use flight checklists and camera tools
Access flight checklists to manage pre-flight, in-flight, and post-flight procedures. Capture and record flight moments using the built-in camera. Sync photos and videos to the cloud for storage.



Gear Simulation & Calculation
Heng Jia Liang
Simulate gears, calculate ratios, track speed
Calculate ratios, torque, and speed for train systems. Input teeth numbers and speeds to determine outputs. Simulate train operation instantly. Preview system functionality before 3D printing.




Machining App for Machinists
Motionics, LLC
Machining calculator and reference tool.
The app provides calculations for drilling, milling, and turning operations. It also serves as a reference tool with charts for tap sizes, drill sizes, and machining parameters for various materials and tool types.

Spool Ethanol Analyzer
Ajay Rajeev
Connect to sensor, analyze content and temperature
Connects to Wireless Sensor Kit or Handheld to measure content and fuel temperature. Displays real-time data via Bluetooth. Includes mixing ratio calculator for fuel blends. Functions without the sensor kit.

Proportional Scale
Courtney Parsons
Calculate image dimensions without distortion.
The app calculates new image dimensions while maintaining aspect ratio to prevent distortion. It offers fraction and percent modes, and an image scale tool for precise pixel sizing with a preview.




PiniOn
PiniOn Tecnologia S.A.
Complete missions and earn points
Complete missions at malls, cinemas, supermarkets, pubs, restaurants, or home. Take pictures, answer questions, and share opinions about brands, products, and services. Earn money and points for each completed task.

Psychrometrics
Wassim Murr
Calculate air properties and track moisture levels
Calculate air properties like temperature, humidity, and dew point. Determine enthalpy and moisture content. Convert between psychrometric units. Visualize air state diagrams. Export data for engineering analysis.


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Apps are ranked by functional similarity, category fit, rating confidence, and popularity.