Chain & Sprocket Calculator vs Sensor Multitool

Achieve perfect gearing with Chain & Sprocket Calculator – the all-in-one toolkit for chain drive systems. Designed for engineers, mechanics, and serious riders, this app delivers accurate calculations and insights to optimize your chain and sprocket setup. Whether you’re tuning a motorcycle’s final drive or designing an industrial conveyor, Chain & Sprocket Calculator provides the answers you need. Key Features & Benefits: Gear Ratio & Speed Calculator: Input your small and large sprocket teeth counts to instantly get the exact gear ratio. See how changes in sprocket size affect engine RPM and vehicle speed. For a given engine RPM, find out how fast you’ll go – in MPH or KPH – by entering the tire diameter on the driven sprocket (ideal for motorcycles, bicycles, go-karts, etc.). Ever wonder what speed you’d hit at redline in top gear? This app computes it for you in seconds. Chain Length & Adjustment: Determine the optimal chain length (number of links) for your sprocket combination. The calculator computes chain link count and precise center-to-center distance between sprockets. You can lock the center distance to see how many links are needed to fit a fixed axle distance, or conversely unlock it to see the center distance for a given chain length. This feature helps when adjusting wheel position for chain tension – for example, adding or removing a link to keep your motorcycle’s rear wheel within the adjuster range. No more trial and error – get the correct chain length before you break out the wrench. Common Chain Sizes Presets: Quickly select from standard roller chain pitches (ANSI #25, #35, #40, #50, #60, etc.) or enter a custom pitch. The app supports both inch and metric units (with automatic conversion), so you can work with chain pitch in inches or millimeters seamlessly. This ensures accuracy for any standard chain size you’re using. Sprocket Diameter & Wear Optimization: View the effective pitch diameter of both the small and large sprockets, useful for clearance and design considerations. The app goes further with an Optimal Wear Rate analysis – it calculates how often the same chain link contacts the same sprocket tooth. For example, if every 16th chain revolution brings the same link back to a particular tooth, that might be indicated as a 0% optimal wear scenario (meaning wear could concentrate on those links and teeth). The app presents this as a percentage and color code, so you can judge how evenly wear will distribute across the chain. A higher percentage means more even wear, prolonging the life of your chain and sprockets. In short, find the combination that minimizes uneven wear, saving you money on replacements. Interactive Sprocket Diagram: Visualize your setup with a scaled diagram of the sprockets and chain. The app animates the rotation, highlighting a reference tooth/link (you can even mark a specific tooth). This interactive view helps you double-check alignment and visualize how the chain wraps around each sprocket. It’s not only useful for verification – it’s also a great teaching aid or demonstration tool when explaining gear ratios and timing to others.

Raw Sensor Multitool gives you instant, real-time access to the raw data streaming from your iPhone's built-in sensors — all in one clean dashboard. Designed for DIY makers, engineers, hobbyists, and anyone who wants to know exactly what their phone is measuring. SENSORS INCLUDED • Accelerometer — Live X, Y, Z forces in g. See gravity, tilt, and motion as raw values. Perfect for understanding how your phone moves in space. • Gyroscope — Real-time rotation rates on all three axes in rad/s. Ideal for robotics, motion tracking, and calibration projects. • Magnetometer — Raw magnetic field strength in microteslas (µT) on X, Y, Z. Detect nearby magnets, map field distortions, or calibrate compass-based projects. • Altimeter — Relative altitude change in meters and absolute barometric pressure in hPa. Zero the baseline at any time with the Reset button. • Compass — Magnetic and true heading in degrees, with a live compass rose and accuracy indicator. Instantly see if your magnetometer needs calibration. THREE SENSITIVITY MODES Tap Raw, Balanced, or Smooth at the top of the dashboard to control how data is filtered: • Raw — No filtering. Full precision. Every sensor update displayed as-is. Best for debugging and precision DIY work. • Balanced — Light smoothing with reduced decimal places. Clean and readable. The default mode. • Smooth — Heavy moving-average filter. Dramatically reduces noise. Best for steady observation and general use. DESIGNED FOR DIY PROJECTS Whether you're building a sensor logger, calibrating a magnetometer array, testing a motion-sensitive prototype, or just curious about your phone's hardware — Raw Sensor Multitool puts the data front and center, with no clutter. All sensor data is processed entirely on-device. Nothing is stored, logged, or transmitted.