Comparison

RealADSB vs KnowTAM

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RealADSB

Track local air traffic from your device using ADS-B data feeds. View aircraft on a map or list, filter by various parameters, and access additional flight information. Supports custom feeds and public data sources.

Highlights
  • ADS-B traffic feed consumption
  • Map and list view of aircraft
  • Aircraft filtering by tail number, callsign, type
  • METAR and altitude adjustments
  • Push notifications for squawks 7600/7700
  • Integration with online flight resources
Features
Read full description

RealADSB app is intended for stationary observers of local air traffic. It can consume traffic feed generated by adsb_hub or adsb_hub3 server applications. With some limitations traffic feed in SBS-1 BaseStation format (port 30003) is also supported. For example Stratux ADS-B device or ADSBx feeder can produce such feed. Another option to get traffic feed is to use Airplanes.live integration. That could be a good way to start using app because such option doesn't require additional hardware. You can setup traffic feed yourself or use one of the public feeds covering Germany, UK and New York. adsb_hub server application is using Java runtime and can run on PC, Mac or Raspberry Pi. It can work on top of FlightAware, FR24 feeders or generate feed using cheap USB adapter and external antenna. For more information please check our web site http://www.realadsb.com Inside mobile app commercial, private and military aircrafts are shown on map or in scrollable list sorted by distance from reference point. It can be your current location or airport defined by ICAO code such as LFPG. When ICAO code entered special button provides access to METAR and aircrafts below transition altitude will have altitude adjusted using barometric pressure of the airport. There is a way to search/filter aircrafts by tail number, callsign, type, altitude in both list and on map. Additionally 2 layers with airports and weather are available on map. For each airframe following basic parameters shown: * Speed, Altitude, Heading, Rate of climb/descend, Squawk and for most of them there is additional information: * Tail number, Callsign, ICAO type, Origin/Destination, Photo If information about tail number or type of aircraft is missing you can easily add it right inside the app. This change will be automatically shared across all devices that using same iCloud account. Other features: * Quick access to online resources including FlightAware, Google Flights, LiveATC etc. * Push notifications for special squawks 7600/7700 * Imperial or metric units * 3 types of map: standard, satellite and hybrid * Sharing of map with aircrafts using standard iOS Sharing Panel * Barometric pressure and altitude measured by mobile device conveniently shown at the bottom of main menu

About

KnowTAM

Prepare for FAA knowledge tests and checkrides with flashcards, quizzes, and practice exams. Features detailed explanations, regulation references, and spaced repetition for effective learning. Study offline anytime, anywhere.

Highlights
  • Flashcards with CFI explanations
  • Practice exams mirroring real tests
  • Offline study functionality
  • Spaced repetition learning
  • Oral exam preparation
  • Study plan tailored to test date
Features
Read full description

Study smart and pass. KnowTAM is flashcard, quiz, practice-exam, and oral-exam prep for your FAA knowledge tests and checkrides, with over 1,800 cards across every rating. Whether you're a student knocking out your first written, a pilot prepping for a checkride, or staying sharp for a flight review, KnowTAM gets you ready and keeps you ready. WHAT'S INSIDE • Flashcards with the answer, a CFI explanation of the "why," the regulation or handbook reference, and the exact FAA ACS code each card maps to, all written to the Airman Certification Standards. • "Refer to the figure" questions on real FAA images: sectionals, instrument and approach plates, airport signs and markings, and weather diagrams. • Multiple-choice quizzes by subject area that don't just mark you wrong; they highlight exactly why each wrong answer is wrong, with instant feedback scored against the 70% FAA passing mark. • Full-length practice exams built like the real thing: a short question with three lettered choices, timed, scored against the 70% passing mark, with Private exams drawn to the FAA's subject blueprint so the mix matches the real test. • A study plan paced to your test date: tell KnowTAM your rating and when your written is, and it sets each day's new cards and reviews, shows whether you're on track, and tells you when to take a practice exam. • Spaced repetition that brings back the cards you miss and spreads out the ones you know, so you reach "mastered" and stay there. • Checkride / oral-exam sets that drill the way a Designated Pilot Examiner actually asks. Also perfect before a flight review. STUDY ANYWHERE, ANYTIME KnowTAM works fully offline: no signal, no problem. Everything runs in airplane mode with no account required, so you can study whenever and wherever you are: at the hold-short line, on a long cross-country, or on the airline ride to your checkride. START FREE Start free with Private: the first three modules are on us. And the entire Aviation Weather track is free for everyone: the atmosphere, fronts, thunderstorms, icing, mountain weather, and reading the reports, all with FAA diagrams. Unlock the rest of Private, add Instrument, Commercial, or Multi-Engine, or grab the all-access bundle. Simple one-time purchases, never a subscription. RATINGS COVERED • Aviation Weather (free for everyone) • Private Pilot • Instrument Rating • Commercial Pilot • Multi-Engine (Vmc, the critical engine, single-engine performance) Original, ACS-aligned content, written and reviewed by a working CFI. No account needed: your progress stays on your device unless you choose to sync it with a free account. An app by Fly With Winston. KnowTAM is independent study material and is not affiliated with or endorsed by the FAA.

Screenshots

RealADSB3 screens
KnowTAM4 screens

Verdict

The call

The clearest difference is review sentiment: KnowTAM at 100% against RealADSB's 35%. KnowTAM also leads on price (Free vs $6.99) and rating (5.0 vs 3.0). RealADSB's advantage is in-app purchases (none vs 8) and device support (5 vs 2). On ratings volume, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

KnowTAM is free to download; RealADSB costs $6.99 up front. KnowTAM sells 8 one-off in-app purchases. RealADSB asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

KnowTAM holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 35% of RealADSB's written reviews are positive against 100% of KnowTAM's.

UpkeepUpdate frequency

RealADSB ships an update monthly, KnowTAM every 2 months. The most recent releases landed on October 6, 2026 and October 17, 2026 respectively.

Scorecard7 real differences · 3 level
RealADSB versus KnowTAM: the parameters behind the verdict, then further details
ParameterRealADSBKnowTAM
Price$6.99Free — better
Rating3.0 (4 ratings)5.0 (2 ratings) — better
Positive reviews35.3% of reviews100.0% of reviews — better
Number of ratings4 — better2
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, Mac, Apple TV, Apple Watch — betteriPhone, iPad
Requires iOS26.016.4 — better
Further details — not scored
Size52 MB75 MB
Age rating4+4+
DeveloperNikolay KlimchukWinston Tripp Aviation LLC

Customer experience

RealADSB

All ratings4 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews17 reviews
Positive35.3%
Neutral0.0%
Negative64.7%

KnowTAM

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

RealADSB

No in-app purchases

8 purchases

KnowTAM

One-time8
  • KnowTAM CAX Checkride$9.99
  • KnowTAM Instrument Checkride$9.99
  • KnowTAM Private Checkride$9.99
Show 5 more
  • KnowTAM Multi-Engine$14.99
  • KnowTAM Commercial (CAX)$19.99
  • KnowTAM Instrument (IRA)$19.99
  • KnowTAM Private (PAR) - Full$19.99
  • All-Access Bundle$59.99

Questions

Is RealADSB free?
RealADSB costs $6.99, with no in-app purchases.
Is KnowTAM free?
KnowTAM is free to download, with in-app purchases available.
Which has better reviews, RealADSB or KnowTAM?
KnowTAM is rated higher. RealADSB averages 3.0 out of 5 from 4 ratings, while KnowTAM averages 5.0 from 2 ratings.
Do RealADSB or KnowTAM have ads?
Neither RealADSB nor KnowTAM shows ads.
Which is updated more often, RealADSB or KnowTAM?
RealADSB ships an update monthly, and KnowTAM every 2 months. Most recently, RealADSB was updated on October 6, 2026 and KnowTAM on October 17, 2026.

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