Log4Pilot is one fast, legally faithful logbook for student and GA pilots. Log a flight in seconds, see currency from your own entries, and hand an examiner a proof pack — without reconstruction.
Local-first privacy: no account, no developer server, no tracking. Your logbook stays on your iPhone and in your own iCloud Drive. Formats designed to match FAA, EASA and UK CAA layouts — never “approved”. Informational computations, never “legal to fly”.
The core loop
One person, one install, one primary device. No crew rostering, no back-office, no messaging. Just a quiet, exact record that shows its working — every figure drills to the entries that produced it, including near-misses excluded with reasons.
Last aircraft, route and role pre-filled. Quick chips (Now −30m), day/night split suggested from instants + coordinates for you to confirm, four landing counts, approaches, signatures. Duplicate-last-flight in one tap.
— Raw facts only, never derivedToday cards for §61.57 day / night / instrument / flight review, FCL.060 passengers + night, SEP revalidation progress, medical alerts. Each states rule + bundle version and the entries that prove it.
— Informational, never “legal to fly”FAA logbook, FCL.050 12-group logbook, UK CAA submission + signed certification page, 8710 worksheet, endorsements, raw CSV. Integer-minute reconciliation gate blocks export if a page fails to add up.
— Print-ready PDF + CSV bundle* Jurisdiction profiles at launch: FAA Part 61; UK Part-FCL extending EASA Part-FCL. Profiles form a lineage with overrides; bundles ship with app updates and stay reproducible.
On your entries, you meet the requirement for ASEL until 31 Dec 2026.
Rule bundle uk-fcl-2026.1 • 3 TO / APP / LDG • 90 days • same type/classOn your entries, you meet the night requirement for ASEL until 18 Dec 2026.
1 night TO / APP / LDG or IR • drill to entries →On your entries, SEP experience is incomplete: 5.1 h more SEP time; 1 h refresher training with instructor (signed).
Unsigned PICUS = 0 PIC (FCL) • pending list + chase →Status is never colour-only: colour + icon + text • AX5-safe • VoiceOver-labelled
Currency & recency engine
Rules are versioned data bundles, not code. FAA §61.57(a) day, §61.57(b) night (full-stop, 1-hour-after-sunset window), §61.57(c) instrument (6 approaches + holding + intercept/track in 6 calendar months), §61.56 flight review — alongside FCL.060(b), SEP revalidation, LAPL recency and medical alerts.
Copy rule: “On your entries, you meet §61.57(a) for ASEL until 3 Dec 2026.” Never “you are legal to fly.” First engine use and every report footer carry the full disclaimer.
Flight entry • FSTD • Ground training
Aircraft, aerodromes and instructors feed every form, endorsement and report. Aircraft classification snapshots onto the entry — later edits never rewrite history silently. All instants UTC; display renders local or decimal hours. Durations are whole minutes; there is no floating-point time math.
Reports & proof pack
Generated on-device. Every figure carries profile + bundle version + window; every page is numbered with pilot name + licence number. Any element can be generated alone — or as a single proof pack (PDF + optional CSV bundle).
§61.51(b) fields, profile totals with page + cumulative. Cross-country computed under the certificate’s own definition (>50 NM and friends are rule data, not code).
Front matter, landscape 12 groups, page-totals rows reconciling exactly in every time column, verbatim certification block on every page, countersignatures in remarks.
FCL.050 paginated for A4 + personal-details page + one certification page (date, full name, signature, CAA reference) — signed in-app or by hand after printing.
Form 8710-1 Section III-style grid for the selected certificate/rating, every cell drill-downable in-app. Labelled as a transfer worksheet; nothing is submitted.
AC 61-65-style versioned templates, pre-filled from linked entries, signature images where the profile accepts electronic signing. Gap check flags what an examiner will look for.
One row per flight / FSTD / ground entry with every stored fact (UTC ISO-8601, integer minutes, four landing counts, countersignature states) + documented column dictionary. Export works paid or not.
App Privacy: Data Not Collected • No tracking domains • No third-party SDKs
Privacy & data safety
No accounts, analytics, tracking or third-party network SDKs. Optional Face ID / Touch ID app lock. Signature and licence images live on-device and in your own iCloud backup only. Crash diagnostics via Apple opt-in mechanisms only.
How it works
Built offline-first in SwiftUI for iOS 17+ (iPhone-first). Pure-function projection + currency engines over value-type snapshots — deterministic and fixture-tested. PDF via on-device renderer; CSV via hand-rolled, escape-tested writer.
Add aircraft, aerodromes (built-in GA gazetteer + your strips), instructors. Import past flying via generic CSV mapping or asserted opening balances — labelled, lifetime-only, never currency.
Quick-log from Today. Local notifications for currency, medical, pending countersignatures and backup health — requested in context, never for marketing.
Generate the pack an examiner expects — cover with profiles + rule versions + timestamp + disclaimer, evidence lists, signed pages. If it doesn’t reconcile, it doesn’t export.
“Log4Pilot computes currency and totals from your own entries using published rules. It is not legal advice and does not replace your logbook responsibilities or an instructor’s or examiner’s judgement.”
Now on the App Store • iPhone • iOS 17+
Log4Pilot is live. Download for pilots, instructors and examiners — no marketing notifications, ever. Free allowance, then one-time unlock. Pay once. Your logbook is yours.
Questions? [email protected] • Support page: m-pax.net/log4pilot/ • Bundle ID (working): net.m-pax.log4pilot