Comparison

C150 Pad vs Instrument Ground Instructor

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

Head to head
About

C150 Pad

This application is a flight planning tool for the Cessna 150, calculating mass and balance, takeoff and landing distances, climb data, and optimal cruise altitudes. It allows users to input various flight conditions and aircraft configurations to generate precise performance metrics.

Highlights
  • Mass & Balance calculations
  • Takeoff and Landing distance computation
  • Climb performance analysis
  • Optimal cruise altitude finder
  • Stall speed calculation
  • Load manifest generation
  • Scenario "what if" analysis
Features
Read full description

Gyronimo Performance Pad -Cessna 150- The ultimate EFB computer for Mass & Balance and Performance. For Cessna 150 with fixed pitch propeller 69 inches and Continental Engine O-200-A, 100hp at 2750 RPM Compatibility: requires iPad 3 or newer, or iPad Mini Retina Calculate and interpolate performance data using the actual values from the Cessna 150 Pilot's Operating Handbook (POH). Finish your complete fight planning in just a few seconds. Performance planning has never been easier and quicker. Results are updated immediately and displayed in high resolution graphics, enhanced for the iPad and iPad Mini. Change all important values using sliders. Experiment with the results and create "what if" scenarios in no time. Find your optimal cruise altitude, takeoff ground roll, landing distance, climb data and stall speeds. The Performance Pad C150 has seven main pages: 1. The Mass & Balance (or Weight & Balance) Page Calculates Center of Gravity, Moments, Takeoff and Zero Fuel Mass as well as Percent MAC (% MAC). Set person and baggage weights in seconds using the convenient sliders. Check if the CG is within limits using three graphical displays - Moment Envelope - CG envelope - Aircraft axis or see a complete load manifest that you can send to your email address to quickly prove that you have completed the Weight & Balance for you flight. 2. The Takeoff Page Using the actual data from the C150 Operating Handbook the Performance Pad calculates and displays Ground Roll and Landing Distance based on: - Aircraft Mass - Takeoff Elevation in MSL (Pressure Altitude and Density Altitude will be computed) - Outside Air Temperature (OAT) - Altimeter Setting - Runway Conditions (i.e. paved dry to long grass or snow) - Runway Slope - Wind Conditions Wind Components Computer - Use the Wind Components page to determine your headwind or tailwind component. Rotate the wind dial to set wind direction, set windspeed and the results will be transferred to your takeoff computations automatically! 3. The Climb page Calculates time, fuel and distance based on - Difference between Takeoff Elevation and intended Flight Level - Altimeter Setting - Outside Air Temperature (OAT) - Altimeter Setting - Headwind or Tailwind Component 4. The Cruise Page Using the actual data from the Pilot's Operating Handbook you can determine the optimal cruise altitude based on - Trip Distance - Flight Level - Engine RPM - Temperature - Wind and Altimeter Setting 5. Landing Page Calculates Ground Roll and Landing Distance based on wind, elevation, altimeter setting etc. Like on the Takeoff Page you can use the Wind Components Computer to quickly determine head- or tailwind components 6. Stall Speed Page. Calculates The Stall Speed based on Bank Angle and Flap Settings. Stall Speed will be computed as KIAS and KCAS using the actual values from the Cessna POH. 7. Setup - Load and Save up to five Aircraft Settings and Scenarios. - Send a Mass & Balance Summary to your email address. - Visit our video channel and watch tutorials and video manuals. Mode Switch: The Performance Pad can be used in two Modes: "Individual Mode" All calculations can be done independently from each other. "Plan Mode" Calculated values will be forwarded to the next page and an additional "Flight Summary Page" is available. Choose this mode if you want to do a complete performance planning. Disclaimer: The author disclaims any liability for any direct, indirect, incidental, or consequential losses or damages in connection with your access to or use of this software. The information contained in this software is for general information purposes only.

About

Instrument Ground Instructor

Read full description

The Instrument Ground Instructor Knowledge Test Prep App is the fastest way to ace your FAA Written Exam! Our main goal is to keep you updated with the latest test bank! Questions are added, changed and deleted throughout the year. When they are, we'll update them as soon as possible. Features: • Simple to use interface recommended by Flight Instructors. • Scores, the date and time taken for quizzes and tests are saved to keep track of your progress. • Questions and answer choices are random just like the real exam! • Zoomable figures are activated and deactivated by a button tap. • Optional sound effects for selected answers in Quiz Mode. • Shocks! Answer incorrectly and feel your iPhone vibrate! (This can be turned on and off.) • No internet connection required. Modes: Quiz Mode - While taking a quiz, correct answers you choose are shown in green while incorrect ones are shown in red. Test Mode - Simulates the test you are going to take at a FAA Knowledge Test Center. In this mode, you are asked 50 questions that are pulled from the entire question bank. Study Mode - Here you can read all the questions with only the associated correct answers!

Screenshots

Instrument Ground Instructor4 screens

Verdict

The call

The clearest difference is price: Instrument Ground Instructor at $4.99 against C150 Pad's $16.99. Instrument Ground Instructor also leads on device support (3 vs 1) and iOS requirement (11.0 vs 16.6). On update cadence, ads and in-app purchases 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

C150 Pad costs $16.99 and Instrument Ground Instructor $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

C150 Pad ships an update every 8 months, Instrument Ground Instructor every 7 months. The most recent releases landed on October 11, 2026 and October 20, 2026 respectively.

Scorecard3 real differences · 7 level
C150 Pad versus Instrument Ground Instructor: the parameters behind the verdict, then further details
ParameterC150 PadInstrument Ground Instructor
Price$16.99$4.99 — better
Rating4.0 (4 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 8 monthsEvery 7 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPadiPhone, iPad, iPod — better
Requires iOS16.611.0 — better
Further details — not scored
Size24 MB102 MB
Age rating4+4+
DeveloperGyronimo, LLCBravo Zulu Apps LLC

In-app purchases

None

C150 Pad

No in-app purchases

None

Instrument Ground Instructor

No in-app purchases

Questions

Is C150 Pad free?
C150 Pad costs $16.99, with no in-app purchases.
Is Instrument Ground Instructor free?
Instrument Ground Instructor costs $4.99, with no in-app purchases.
Do C150 Pad or Instrument Ground Instructor have ads?
Neither C150 Pad nor Instrument Ground Instructor shows ads.
Which is updated more often, C150 Pad or Instrument Ground Instructor?
C150 Pad ships an update every 8 months, and Instrument Ground Instructor every 7 months. Most recently, C150 Pad was updated on October 11, 2026 and Instrument Ground Instructor on October 20, 2026.

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