DRIN vs Drone Flight Time & Range

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.

The drone pilot's pre-flight endurance planner — flight time, safe range and a clear GO / NO-GO verdict before you take off. Enter your pack data the way your spec sheet lists it (Wh + W, Ah + V + W, or Ah + A), set the usable battery share (the conservative 80% convention by default) and pick your reserve. Read the safe flight time in minutes, the safe range in km — one-way or out & back with the turn-around point — and a reserve verdict against the ≥25% operator standard. A pre-flight summary lists every assumption, ready to double-check at the field. PRO • Payload planning: add the payload's extra power draw and see the real cost in minutes and km • Wind planning: head- or tailwind on the outbound leg, return leg flipped automatically, legs computed separately • Multiple drone profiles — keep every aircraft one tap away • Save flight plans to history • Share clean PDF flight-plan reports Free tier stays honest: one drone profile, full endurance and range math, plain-text share. Built for the field: big steppers, huge results, sunlight-readable Outdoor Bright mode. Everything stays on your phone — fully offline, no account, no tracking. Results are planning estimates — always verify against manufacturer data and your local aviation rules. PRO UNLOCKS: wind & payload planning, multiple drone profiles, calculation history and PDF flight reports. Available as an auto-renewable subscription (monthly or yearly) or a one-time Lifetime purchase. ——— Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://hdappstudio.com/droneflight/privacy/