# StackTrack-CRW > Calculates CRW jump exit points using real-time winds aloft and canopy performance. (iPhone/iPad app by Peter Fetros.) - Source: https://appshunter.io/ios/app/stacktrack-crw/id6769865126 (this page in markdown: same URL + `.md`) - Developer: [Peter Fetros](https://appshunter.io/developer/1896694923) - Category: Navigation, Utilities - Price: Free - Rating: 5.00/5 from 2 App Store ratings - Age rating: 4+ - Requires: iOS 15.1 · 69 MB - Languages: American English - Released: 2026-05-18 - Data updated: 2026-07-20 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/stacktrack-crw/id6769865126/reviews.md ## What is StackTrack? StackTrack takes the guesswork out of spotting for CRW jumps. Enter your drop zone, exit altitude, and canopy performance numbers, and StackTrack calculates your optimal exit point using real-time winds aloft data - so your canopy arrives at the target, not half a mile downwind. How it works StackTrack fetches a live upper-air wind profile for your drop zone from Open-Meteo and runs a simulation from exit altitude down to breakoff. It accounts for wind speed and direction at every 1,000 feet, your canopy's forward speed, and your descent rate to place the exit point exactly where it needs to be. Features • Real-time winds aloft - automatically fetched for any location worldwide • Interactive satellite map with flight path, jump run line, exit point, and altitude markers every 2,000 ft • Lateral and along-track offset sliders to fine-tune the exit relative to the jump run • Winds aloft table showing direction, speed, and temperature at each altitude • Forecast mode - step forward or backward in 1-hour increments to plan ahead • Supports imperial and metric units, multiple speed units (mph, knots, km/h, m/s) • Weather screen with full forecast for your drop zone • Draw generator for 2-way and 4-way sequential ## Key features - Real-time winds aloft data - Interactive satellite map - Flight path and exit point visualization - Lateral and along-track offset sliders - Winds aloft table - Forecast mode - Unit and speed unit support ## Frequently asked questions about StackTrack ### What is StackTrack-CRW? StackTrack-CRW is a free navigation app designed to calculate the optimal exit point for CRW (Canopy Relative Work) jumps. It uses real-time winds aloft data and your canopy performance to ensure accurate arrival at the target. ### How does StackTrack-CRW calculate the exit point? It fetches live upper-air wind profiles from Open-Meteo and simulates the descent from exit altitude to breakoff. The app accounts for wind speed and direction at various altitudes, canopy forward speed, and descent rate. ### Can StackTrack-CRW be used worldwide? Yes, StackTrack-CRW automatically fetches real-time winds aloft data for any location worldwide, making it a versatile tool for skydivers globally. ### Does StackTrack-CRW offer offline functionality? The provided data does not specify offline functionality. Real-time wind data fetching suggests an active internet connection is likely required for its core features. ### What units does StackTrack-CRW support? StackTrack-CRW supports both imperial and metric units, as well as multiple speed units including mph, knots, km/h, and m/s, catering to a wide range of user preferences. ### How often is StackTrack-CRW updated? The app was last updated on June 17, 2026, indicating recent development. The latest version is 1.0.3. ### Is StackTrack-CRW suitable for beginners? While the app is rated for ages 4+, its specific focus on CRW jumps suggests it is primarily intended for experienced skydivers familiar with these maneuvers. ### Does StackTrack-CRW have ads? No, StackTrack-CRW is ad-free. The application does not contain advertisements, providing an uninterrupted user experience. ## Version history (last 4 releases) ### 1.0.6 — 2026-07-06 Wind Data & Accuracy - Fixed a bug where the spotting calculator was fetching wind data for the wrong hour on non-UTC devices (could be up to 7 hours off) - Wind profile altitudes now correctly shown as AGL (Above Ground Level) on both the weather and spotting pages, matching what skydivers read on their altimeters - Improved near-surface wind accuracy by including additional atmospheric measurement levels (80m, 120m, 180m), bringing the spotting and weather pages into agreement through the lower altitudes Weather Page - Winds aloft table now shows highest altitude at the top and ground level at the bottom UI - App version number now displayed subtly at the bottom of the home screen ### 1.0.3 — 2026-06-17 StackTrack v1.0.3 - Added Smoots as a selectable distance unit. - Replaced the orientation toggle icon on the 2-way, 4-way, and rotations draw pages. The button previously used a refresh icon and was being mistaken for a redraw/regenerate button. It now uses a phone-rotate icon that reflects the current orientation. ### 1.0.2 — 2026-05-20 - Added explicit editing mode for tweaking the spot. - Added heading slider to change heading on-the-fly. - Performance improvements for generating spots more quickly. - Extended the canopy flight path on the spotting map from breakoff altitude all the way to the ground, showing where you would land if you kept flying the same heading - Added a "Breakoff" label marker at the breakoff altitude point on the flight path - Added altitude dot markers every 2,000 ft on the ground path extension, including at 0 ft - Changing your heading in Tweak mode no longer resets your offset and exit sliders, the flight path recalculates using your current positions - Added a "Calculate Optimal" button in Tweak mode to snap sliders back to the calculated ideal spot - Removed the "JUMP RUN" text label from the jump run line on the map ### 1.0 — 2026-05-18 No release notes. --- *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 2026-07-20.*