FALKRYN
Drone fleet logbook · offline-first

Every flight,
on the record.

FALKRYN keeps your unit's flight logs, aircraft, batteries and pilot currency on your own computer. Everything is encrypted, each log is sealed the moment it's imported, and the record holds up when someone asks what happened.

FALKRYN readiness screen: fleet readiness, flight hours, pilot currency, a verified evidence ledger, aircraft status cards and recent flights.
READINESS · DEMO UNIT, SIMULATED FLIGHTS
  • AES-256encrypted at rest
  • Ed25519signed evidence ledger
  • EMCONTactical mode, no network
  • 3 formatsArduPilot · MAVLink · PX4

A flight log is evidence. Most units keep it on an SD card and a spreadsheet.

  1. 01

    Logs get renamed, copied to a thumb drive, or lost with the laptop.

  2. 02

    Maintenance hours are estimated after the fact, not counted from the flights.

  3. 03

    Nobody can show that the file in the report is the file that came off the aircraft.

Evidence ledger

Sealed the moment it lands.

On import, FALKRYN hashes the original log with SHA-256, locks it in an encrypted vault and writes an entry to an append-only ledger. Change one byte of any entry and every entry after it stops matching. Try it.

Chain verified5 of 5 entries match. Head 7c9603…05a5
  1. #33 flight.imported
    Corridor Inspection 5:33
    prev
    8376d9…5765
    hash
    7016ab…7cba
    verified
  2. #34 flight.imported
    Accident Reconstruction 5:57
    prev
    7016ab…7cba
    hash
    0dd465…b5e8
    verified
  3. #35 flight.imported
    Search & Rescue 7:14
    prev
    0dd465…b5e8
    hash
    f985e4…4344
    verified
  4. #36 maint.logged
    FK-05 arm 3 + ESC replaced
    prev
    f985e4…4344
    hash
    0156a7…2525
    verified
  5. #37 flight.imported
    Overwatch 12:22
    prev
    0156a7…2525
    hash
    7c9603…05a5
    verified

Each entry stores the hash of the entry before it. FALKRYN also signs every entry with the computer's own Ed25519 key, so a forger can't quietly recompute the chain either.

Three network modes

Works where the signal doesn't.

One switch in the top bar decides what FALKRYN is allowed to say to the internet. The answer can be nothing at all.

Online

Pulls map tiles, checks for updates and checks in with your unit's portal account. Records still live on the computer, not in someone's cloud.

FALKRYN flight replay: an Overwatch flight path drawn over a topographic map, with telemetry and chain-of-custody details.

Offline

Nothing leaves the computer. Save map packs for your county before you deploy and the maps keep working in the field, with no signal.

FALKRYN offline map pack screen, showing a saved area ready to use without internet.

Tactical

EMCON. No network traffic at all, coordinates masked on screen, and exports that leave out the launch point.

FALKRYN in Tactical mode: an amber EMCON banner, launch location masked, and the flight path on a plain grid.
Who it's for

Built around the work you actually fly.

01

Police & public safety

Accident reconstruction · Search & rescue · Overwatch

A case number on every flight and a chain of custody on every file. When the defense asks whether the log was edited, you hand over the ledger instead of an opinion. KML exports open straight in ATAK.

02

Agriculture

Crop scouting · Spraying · Field mapping

Maintenance is counted from logged flight time, not from memory, so a sprayer hex doesn't fly past its interval in the middle of the season. Offline map packs cover the fields where your phone has one bar.

03

Military & government

Training · Survey · Restricted sites

Tactical mode with no network traffic, coordinates masked on screen, sanitized exports without the launch point, encryption at rest and an emergency erase when the computer can't come home.

What's inside

The whole logbook, in one program.

No server to stand up and nothing to configure before the first flight. Install it, import a log, and the record starts there.

Flight logs
ArduPilot DataFlash (.bin), MAVLink telemetry (.tlog) and PX4 ULog (.ulg). The original file is hashed, kept in an encrypted vault and can be wiped from the SD card after import.
Replay
Flight path on the map with altitude, speed, battery and flight-mode changes on one scrubbable timeline.
Fleet
Aircraft and batteries with maintenance intervals counted from real flight time. Grounded aircraft say why.
Pilots
Currency computed from the logbook: recurrent training and flights in the last 90 days.
Before you fly
A Go / No-Go check against aircraft, battery and pilot status, plus incident reports tied to the flight.
Maps
USGS topo and imagery, and offline map packs you save before you deploy.
Exports
KML and KMZ for ATAK and Google Earth, CSV for spreadsheets, and printable PDF reports.
Security
Encrypted database (SQLCipher, AES-256), keys held by Windows Credential Manager, Argon2id local sign-in with five roles, re-confirmation for risky actions, and emergency erase.
Interface
Simple mode for the field, Expert mode for the office, light and dark themes, and a guided tour on first run.
Runs on
Windows 10 and 11, 64-bit. No server to stand up. Works fully offline.
FALKRYN Cloud portal

One account for the whole unit.

At app.falkryn.com, admins invite people, build groups the way the unit is actually organized, and name roles whatever your unit calls them. Then they switch each permission on or off.

  • Sign in with a passkey. No password to phish.
  • Every linked computer in one list, with when it was last seen.
  • Laptop lost or stolen? Cut it off from anywhere.
  • Every admin change lands in a tamper-evident activity log.

Put your fleet
on the record.

Create your unit's account, then link each computer from inside the desktop app. Early access is open now.