Loki
Open source skydiving logbook
Your jumps, your gear,
your data.
Loki is an open source digital logbook for skydivers. Self-host, run it locally on your laptop, or possibly use the invite-only hosted version.
AI-powered imports
Use AI vision to scan paper logbooks and instruments, or let an AI agent automatically migrate your existing logbook files. Export an Excel compatible (.csv) backup whenever you want - your logbook data always stays yours.
See AI powered logbook scanning in action
Local Installation
Run Loki locally or self-host it to keep your logbook under your control, use it without relying on a third-party service, and keep access to your data wherever you deploy it.
Binaries and Source Code
Prebuilt binaries for Linux, macOS, and Windows from GitHub Releases.
Linux or macOS
One-line install script
bash -c "$(curl -fsSL https://raw.githubusercontent.com/esamattis/loki/main/install.sh)"Installs to ~/.local/bin/loki (or /usr/local/bin/loki as root). View install script.
Built for the way you jump
Everything you need to keep a clean, searchable record of every jump — and the gear you trust it with.
Digital logbook
Capture every jump with exit and opening altitude, freefall time, description, and jump number.
Customizable jump types
Create your own jump types and assign multiple types to each jump, such as freefly with load organizer or cutaway, or a student jump with FS and Student types.
Locations, aircraft & gear
Track drop zones, aircraft, and rigs as reusable jump items. Assign multiple aircraft to a jump to record both the aircraft type and the individual aircraft.
Gear usage tracking
See how many jumps each canopy, wingsuit or line set has accumulated. Know when it is time to retire or inspect.
Total & yearly statistics
Review all-time totals and jumps by year. Compare freefall time and distance, plus jump counts by location, aircraft, gear, jump type, etc.
Record statistics
Find your longest freefall, altitude and speed records, the most jumps you have made in a day, week, or month, etc.
AI vision imports
Snap a photo of a paper logbook page, altimeter, or audible readout and let AI vision build the jump entry using your own OpenAI API key (BYOK).
AI agent imports
Give an AI coding agent your existing logbook files and Loki's migration instructions. The agent can inspect, combine, convert, validate, and import your jumps automatically.
CSV import & export
Export your logbook anytime—whether you are making a backup, moving to another Loki instance, or leaving for Excel.
Open source. Self-hosted. Yours.
Loki is licensed under the AGPL and runs anywhere you can run a single binary. Host it on your own server, spin it up in the cloud, or just run it locally on your laptop. Your logbook data never has to leave your machine.
- Single executable binary for Linux, macOS, and Windows — no runtime to install.
- No configuration is needed: start the binary and Loki just works.
- Local SQLite storage with no database setup required.
- Deploy to Cloudflare Workers using the free plan
Prefer not to manage it yourself? An invite-only hosted version is also available. Ping Esa-Matti for invite. If you know how to contact me, you might just get one :)
# Download the binary for your platform
./loki
# Open the logbook
open http://localhost:8787That's it. Loki boots a local server and stores your logbook in a single SQLite file into your home directory.
Start your digital logbook today
Use an invitation to create a hosted account, or log in to pick up where you left off.