A pilot's logbook that holds up to an audit

The problem

Pilots have to log every flight and prove they're current — and most still do it in a paper book or a fragile spreadsheet. Totals drift, currency math is easy to get wrong, and an audit means flipping through pages by hand. The tools that exist often lock basic logging behind a recurring subscription.

Constraints

• Entry has to be fast. Logging a flight should take seconds, with smart defaults that remember how you fly.
• Currency must be correct. The rules are precise; the app has to track them exactly, not approximately.
• It works offline. Pilots log at the aircraft, not at a desk with Wi-Fi.

"A logbook is a legal record. 'Mostly right' isn't good enough."

What we built

A fast flight-entry flow with sensible defaults, and a currency engine that tracks requirements automatically and tells a pilot at a glance whether they're current. The whole logbook syncs privately across the pilot's own devices and exports cleanly for an audit — all for a one-time price, with no subscription.

The tech

Native SwiftUI with a local-first data model and private CloudKit sync. The currency engine is pure, deterministic, and thoroughly tested — because the one part of a logbook you can't get wrong is the part that proves you're legal to fly.

The outcome

Logbook shipped to the App Store as a pay-once product. Pilots get audit-ready records and automatic currency tracking, without a monthly fee for the privilege of logging a flight.