DRIN

DRIN is the all-in-one offline toolkit for FPV racing pilots, long-range builders, military operators and hobbyists. Whether you're planning your first 5" quad or maintaining a fleet of 10" long-range platforms - DRIN has the tools you need, no internet required.

17 OFFLINE CALCULATORS • Flight time & thrust-to-weight ratio • Battery capacity, charge time & health (mAh → Wh) • ESC & propeller thrust • Ohm's law & link budget • Signal distance, VSWR loss & dBm to Watts conversion • Dipole design, antenna angle & radio horizon • VTX frequency table & Rx/Tx intermodulation checker All calculators work fully offline — in the field, at the bench, anywhere.

PREFLIGHT CHECKLISTS • Separate checklists for FPV, fixed-wing and preflight inspection • Fully offline — never miss a step, even without signal

COMPONENT FINDER WITH LIVE PRICES • Browse and compare drone parts sourced from AliExpress — only components with verified quality • Auto-generated build recommendations for 5", 7", 8", 9" and 10" drones • Build your own setup from recommended parts, or bookmark components to a local database • Price updates delivered directly in the news feed

FLIGHT LOG & BLACKBOX IMPORT • Log every flight manually or import directly from Betaflight Blackbox • Track: voltage start/end/min, flight duration, temperature, altitude, distance, battery health • Assign logs to specific drones and batteries • Visualize your data with charts: voltage drop, flight duration, distance & altitude, flight type breakdown

BETAFLIGHT CAMERA & VTX PRESETS • Ready-to-use Betaflight configurations for popular cameras and VTX modules • Save your preferred presets for offline access

KNOWLEDGE BASE & NEWS • Short guides and life hacks written by pilots who fly daily • Component overviews, setup tips and best practices • News feed with firmware releases and price updates • Save any article offline for field reference

Available in English, Ukrainian, Spanish and Portuguese.