Built in a Ukrainian drone workshop. Trusted by pilots flying tens of thousands of hours every month.
DRIN is the all-in-one offline toolkit for FPV racing pilots, long-range builders 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.