Part 117: FDP Tracker & Guide
Know your limits. Fly with confidence.
A purpose-built iOS companion for Part 121 crewmembers that tracks Flight Duty Period limits, required rest, and cumulative duty in real time — so you always know exactly where you stand against FAR 117.
Key features
Real-Time FDP Limits
Enter your report time and number of segments to instantly see your maximum Flight Duty Period under the Part 117 tables — with a live countdown as your day unfolds.
Rest & Lookback Tracking
Track required rest periods and rolling lookback windows so you can confirm you're legal before you accept an assignment, not after.
Cumulative Duty & Flight Limits
Monitor cumulative flight time and duty against the 60/100/190-hour and other rolling limits, with clear visual indicators as you approach a cap.
Built-In Part 117 Guide
A plain-language reference to the regulation's key tables and definitions, right where you need it — no thumbing through the FOM at 3 a.m.
Smart Reminders
Optional alerts for approaching limits and rest completion keep critical timing in front of you without you having to do the math.
Reserve & Standby Support
Handle reserve availability periods and standby scenarios with calculations tailored to how Part 117 treats them.
Screenshots
- App screenshot
Live FDP dashboard - App screenshot
Duty day countdown - App screenshot
Cumulative limits - App screenshot
Built-in guide
Technical details
Home Screen Widgets
Glanceable widgets surface your remaining FDP and next rest window without opening the app.
Live Activities
A live countdown on your Lock Screen and Dynamic Island tracks your duty day in real time.
Compliance-First Calculations
Calculations are modeled on the FAR Part 117 tables. The app is an aid, not an authority — always confirm against your carrier's FOM and official guidance.
Private by Design
Your schedule data stays on your device. No account required, and nothing is sold or shared.
Frequently asked questions
- Is this an official FAA or airline tool?
- No. Part 117: FDP Tracker & Guide is an independent aid built by professional airline pilots. It helps you understand and track the regulation, but it is not legal advice or an authoritative source. Always verify against FAR Part 117, your carrier's FOM, and crew scheduling.
- Who is it for?
- Crewmembers operating under 14 CFR Part 117 — primarily Part 121 airline pilots who need a fast, reliable way to check Flight Duty Period limits, rest, and cumulative duty.
- Does it work offline?
- Yes. Calculations run on-device, so the app works without a connection — useful on the aircraft or in areas with poor signal.
- Is my data private?
- Your schedule information stays on your device. There's no account to create, and your data is never sold or shared.
- When will it be available?
- The app is in active development. The fastest way to hear about the launch and beta is to reach out through the contact page.
Ready to simplify your duty tracking?
Get in touch to learn about the launch and how to join the beta.