Saturn FPV Tools

Saturn FPV

About this app

FPV Tools is an open-source utility and visualization suite designed for FPV drone pilots, builders, and racers. It provides offline tools to model motor sizes, compare rate curves, plan frequencies, visualize flight telemetry, and simulate PID controllers.

Designed with a high-contrast dark theme optimized for outdoor readability, FPV Tools works completely offline, contains no ads, and respects your privacy.

### VISUALIZE, COMPARE, AND TUNE:
• VISUAL MOTOR STATOR COMPARATOR
Compare motor stator dimensions (such as 2306 vs. 2207, or 1303 vs. 1204) using visual 3D cylinder models. Instantly compare volume distributions and calculate physical volume to help choose the right motor size for your build.
• INTERACTIVE RATE CURVE GRAPHING
Overlay and compare rate curves dynamically across multiple tabs. Supports Actual, Betaflight, KISS, QuickRates, and RaceFlight rate models. Adjust rates and expo via sliders, inspect stick sensitivity, and generate configuration CLI commands.
• 3D TELEMETRY FLIGHT VISUALIZER
Convert raw EdgeTX, OpenTX, or FreedomTX telemetry log files (.csv) containing TBS Crossfire or ExpressLRS (CRSF) GPS data into KML/KMZ tracks. Applies altitude calibration for terrain-following, enabling 3D flyovers of your flights in Google Earth.
• RACE SPECTRUM & FREQUENCY ORGANIZER
Coordinate channels for Analog and Digital video transmitters (HDZero, Walksnail, DJI O3/O4). Checks for Intermodulation Distortion (IMD) conflicts, organizes pilots into heats, and suggests optimal channel assignments.
• PID STEP-RESPONSE SIMULATION
Model overshoot, settling time, and tracking errors on an animated step-response graph to help visualize how P, I, and D parameters affect flight dynamics.
• THROTTLE PID ATTENUATION (TPA) OVERLAYS
Compare multiple TPA profiles side-by-side to see how PIDs attenuate across the throttle range to help prevent high-throttle oscillations.
• PROP TIP SPEED CALCULATOR
Input KV, cell count/voltage, and propeller diameter to calculate prop tip speed (Mach velocity) relative to the speed of sound.
• SENSOR CALIBRATION MADE SIMPLE
Calculate precise OSD current and voltage scale coefficients for your flight controller based on battery recharge logs from your charger.

### WHY PILOTS TRUST FPV TOOLS:
• FULLY OPEN SOURCE: The source code is published under the GPL v3, inviting everyone to inspect, verify, and contribute. The project is hosted on GitHub: https://github.com/saturn-fpv/fpv-tools
• 100% OFFLINE-FIRST: Performs all calculations and charts locally on your device. Works at remote fields or race parks with no internet or cellular connection. (An internet connection can add a map layer to the telemetry parser tool but is not required.)
• PRIVACY BY DESIGN: No ads, no in-app purchases, and no tracking. Everything stays local on your device.
• DESIGNED FOR THE FIELD: A high-contrast, battery-saving dark interface designed for readability under direct sunlight.
• MODERN DISPLAY LAYOUTS: Safe-area padded layouts designed for modern bezel-less mobile screens.

What’s new

Version 1.2.1 Updates:
• Overhauled RF Calculators link budget formulas, 10W power limits, and presets.
• Added official ExpressLRS sensitivity and antenna gain reference guides.
• Standardized interactive Help documentation overlays across all tools.
• Redesigned TPA Comparison value controls to match Rate Converter.
• Fixed Betaflight current sensor calibration CLI command (ibata_scale).
• Fixed Google Earth Web KML compatibility in Telemetry Parser.