# GroundRollCalc — Calculate takeoff roll

> Calculate takeoff roll (iPhone/iPad app by Rob Honeycutt.)

- Source: https://appshunter.io/ios/app/groundrollcalc/id6747908402 (this page in markdown: same URL + `.md`)
- Developer: [Rob Honeycutt](https://appshunter.io/developer/1820512480)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.5 · 185 MB
- Languages: American English
- Released: 2025-07-01
- Data updated: 2026-08-31
- User reviews in markdown: https://appshunter.io/ios/app/groundrollcalc/id6747908402/reviews.md

## What is GroundRollCalc?

Key Features

Ground Roll Estimation
Calculates expected takeoff ground roll based on:
     - Aircraft performance data
     - Weight and loading
     - Wind conditions
     - Density altitude
     - Runway slope and surface
     - Runway Visualization

Graphical runway display with:
     - Estimated ground roll marker
     - Safety margin indicators
     - Remaining runway awareness

Live GPS Mode (Optional)
     - Track actual takeoff roll in real time
     - Compare real-world performance to predicted values
     - Detect deviations from expected performance

Aircraft & Airport Management
     - Store multiple aircraft profiles
     - Manage airport and runway data
     - Customize inputs for accurate calculations

Built for Real-World Flying
     - Designed for clarity and speed in the cockpit
     - Clean interface optimized for iPad use
     - Focused on practical, decision-support information

Important:
GroundRollCalc is a supplemental performance tool and is not a substitute for approved aircraft performance data, POH/AFM guidance, or pilot judgment. Always verify performance calculations and operate in accordance with safe aviation practices.

Data Sources
Airport and aeronautical data may include publicly available datasets such as FAA and openAIP sources.

 Terms of Use:
  https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| GroundRollCalc Pro Monthly | $0.99 | per month |
| GroundRollCalc Pro Yearly | $9.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock Live GPS | $5.99 | one-time |



## Version history (last 5 releases)

### 2.0.2 — 2026-08-22

— Made GPS source indicator double as a GPS signal strength indicator
— Made Airport selection location aware to automatically enter local airport
— Added contextual responses to wind data collection process when selecting an airport
— Added runway marker for 75% of Vr speed

### 2.0.1 — 2026-07-31

Version 2.0.1 adds the capability to utilize your onboard GPS system via wifi for avionics that have GDL 90 systems.

### 2.0 — 2026-05-16

What’s New in This Version

Version 2.0 is a major update with a complete rebuild of the app architecture and performance model.
     - Fully redesigned calculation engine for improved accuracy
     - New runway visualization with performance markers
     - Added optional Live GPS tracking for real-time takeoff analysis
     - Improved aircraft and airport data management
     - Enhanced user interface and layout for iPad
     - Foundation added for future features including performance learning and data tracking

GroundRollCalc is a precision takeoff performance tool designed for general aviation pilots. It helps you estimate, monitor, and validate your aircraft’s ground roll using real-world inputs and optional live GPS tracking.

Whether you’re flying from a short field, operating in high density altitude, or simply verifying performance against expected values, GroundRollCalc gives you a clear, visual understanding of how your aircraft is performing during takeoff.

### 1.1.2 — 2025-07-14

• Added custom number pad for flight inputs
• Created a quick conversions utility
• Cleaned up minor aesthetics

### 1.1.1 — 2025-07-08

• Fixed hardcoded rotation speed for simulations
• Improved form panel vs runway panel button logic

## Related topics

[honeycutt](https://appshunter.io/ios/topics/honeycutt)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*