NOAA Aviation Weather
METAR and TAF read at analyze time from the Aviation Weather Center, decoded rather than taken on trust
Applying to Y Combinator · F26
See the Risks, Evidence, and Mitigations Before Departure
Weather, terrain, NOTAMs, accident history, aircraft and pilot factors — scored into one readiness picture you can explain.
Run a Preflight Readiness Brief
Where are you flying today?
Checks
Route weather review
Accident corridor scan
Personal minimums check
Aircraft readiness
The Problem
Most Preflight Decisions Are Made from Scattered Sources, Fading Memory, and Time Pressure.
No Single Risk Picture
Weather, NOTAMs, terrain and personal limits live in separate apps, so nothing adds them up into one picture before you fly.
Rushed Preflight Reviews
Checking half a dozen sources by hand takes time you do not have on the ramp, so the hardest risk questions get answered last — or not at all.
No Record of the Reasoning
Without a written record of what was considered, instructors and safety officers cannot review how a go/no-go call was actually reached.
The Solution
See Every Risk Factor, Understand Every Weight, and Walk to the Aircraft Knowing Exactly What You Are Accepting Today
Briefing Assistant
Get a Full Readiness Brief in Minutes
Enter a route, an aircraft and a departure time. FlyNook pulls current weather, terrain, airports and NOTAM hazards, then explains what it found.
Route entry in plain ICAO codes
Weather pulled at analyze time
Source-cited briefing narrative
Briefing Assistant
Hello! Where and when are you flying today?
KBOS to KJFK tomorrow, C172, 1400Z
Route readiness brief
Weather reviewed Corridor accidents checked
Advisory — PIC decides
Describe your flight...
Preflight FRAT
Work a Structured Risk Assessment
A six-step flight risk assessment that walks through pilot, aircraft, environment and external pressure, then records exactly what you acknowledged.
Six-step guided assessment
Your personal minimums applied
Acknowledgement on the record
Assessment - Running
Preflight FRATRoute: KBOS to KJFK
Pull METAR, TAF and NOTAMs
Score 6 weighted factors
Apply personal minimums
Acknowledge and save brief
Progress
60%
Fleet & School Oversight
See Readiness Across Your Whole Fleet
Follow assessment activity across your instructors and students, and spot the patterns worth turning into a debrief.
Org-wide assessment feed
Per-seat Pro for every pilot
Trends worth a debrief
Fleet Overview
126
Briefs Today
11
Factors Scored
92%
Avg Completeness
Cessna 172S
342 briefs
Piper PA-28
289 briefs
Cirrus SR20
156 briefs
Data Sources
Grounded in the Authoritative Record
Every weighted factor is scored from a named source; live traffic is context, not a factor. Where a source is unavailable, the factor reads unknown — never clear.
AWC Hazard Advisories
SIGMET, G-AIRMET and PIREP from the same service, so an airborne report sits beside the surface picture
FAA NOTAM Search
Queried directly where an FAA key is configured; without one the NOTAM factor reads unavailable, not clear
NTSB Accident Record
The published NTSB aviation dataset, ingested and indexed so accidents near your corridor can be read in context
OpenAIP
Airport and airspace records for the fields you are flying between and the structure that sits in between
OpenSky Network
Live ADS-B traffic near the route, read only through licensed access and shown as context beside the score — never weighted into it
Method
Scoring You Can Audit
Years of NTSB history searched
Steps in the preflight FRAT
Every readiness score is deterministic, weighted, and fully explained
Published weights, per-factor sub-scores, and a data-completeness figure that drops when data is missing — never a silent assumption that the risk is low.
Weighted factors behind every readiness score
Capabilities
See How FlyNook Turns Raw Aviation Data Into a Readiness Picture You Can Explain
Data Layer
Data Sources
Aviation weather from NOAA, airport and runway data, terrain, and two decades of NTSB accident records — pulled when you analyze a route.
ROUTE
KBOS to KJFK
Analyze
Score Factors
Review
Brief & Acknowledge
Ready to review
Guided Assessment
Work a six-step flight risk assessment with your own personal minimums applied, and finish with a record of exactly what you acknowledged.
Schedule
Corridor Searched
Weather Reviewed
Message Instructor
Sync to School Fleet
Flag for Review
Accident Intelligence
Historical NTSB accidents in the corridor around your route, grouped by contributing factor so you know what has already happened here.
Route Input
Risk Engine
WeatherTerrainNOTAMsAccidents
Explainable Scoring
Each factor is scored on its own, weighted, and shown to you — with the weight redistributed and data completeness lowered when data is missing.
Works Alongside
FlyNook sits beside the tools you already fly with. It does not replace ForeFlight, Garmin Pilot, or an official FAA weather briefing.
Check the weatherScan the corridorReview NOTAMsApply minimumsBrief the studentCompare the aircraftLog the decisionExport the brief
Debrief the flightWeigh the pressureCheck the weatherScan the corridorBrief the studentReview NOTAMsApply minimumsLog the decisionExport the brief
Who It Is For
Built for How General Aviation Flies
Student Pilots
Learn structured risk thinking early, with an instructor able to review every assessment you save
Private Pilots
A repeatable preflight risk review for the flying you already do, on your own schedule and your own minimums
Flight Schools
Standardize how risk is assessed across instructors and students, with an org-wide feed of every assessment
Flying Clubs
Shared aircraft and many pilots, held to one readiness standard before anyone takes the keys
Aircraft Owners
Readiness for the aircraft you own, with a profile for each airframe and briefings you can export and keep
Mission Flying
Volunteer and public-benefit flights, where schedule pressure is real and worth naming out loud before departure
Security
Security Standards Built for Pilot Data
- TLS
- RLS
- JWT
Encrypted in Transit
Encrypted in transit with TLS, at rest by our hosting provider
No Training on Your Data
Your flights and briefings are never used to train models
Built on Independently Audited Providers
Hosted on providers who maintain their own SOC 2 reports
FlyNook is advisory preflight risk intelligence. It scores six weighted factors — weather, the aircraft, terrain, airports, NOTAM hazards, and weight and balance — into one explainable 0–100 index, and checks accident history, your pilot profile and your personal minimums as findings beside it, so you review one picture before you fly.
Aviation weather comes from NOAA’s Aviation Weather Center, fetched on demand at the moment you analyze a route. Accident history comes from an ingested NTSB corpus covering roughly two decades. Airport and runway data comes from our own index, and FAA NOTAMs are used where they are configured.
No. FlyNook is decision support, not the decision. It is not an official weather briefing, not a certified dispatch tool, and not a substitute for flight instruction, aircraft documentation, or FAA-approved sources. The pilot in command makes every final go/no-go call.
The affected factor is marked unavailable rather than quietly assumed safe. Its weight is redistributed across the factors that did return data, and the briefing’s data-completeness figure drops so you can see how much of the picture is actually there before you rely on it.
A school or club plan covers its whole team, with unlimited instructors and students, and every member gets full Pro access. Assessments flow into a shared fleet feed, so a chief instructor can see how risk is being reasoned about across the program and run debriefs from real examples rather than recollection.
No. The Free plan covers unlimited basic route risk checks and five full AI briefings a month with no card at all. Pro is $20 a month or $192 a year. School and club plans are priced per active aircraft, with unlimited instructors and students; retired aircraft are never billed. Talk to us for a quote.