Groundrush Skydiving
FlySight 2 companion
Only for iPhone
Free
iPhone
Groundrush is a phone companion for the FlySight 2 GPS logger. It connects over
Bluetooth so you can see what the device sees, set up your ENGO 3 heads-up
display, pull a jump off the logger and look at it — standing in the packing
area, with no laptop and no cable.
WHAT IT DOES
• Live telemetry — vertical and horizontal speed, altitude, glide ratio,
satellites and fix quality, straight off the device.
• ENGO 3 HUD setup — choose what the glasses show and how often they refresh,
and bind a FlySight to one specific pair. No laptop needed.
• Track library — import .csv and .gpx files, browse them by day, export and
share. Everything stays on your phone and works offline.
• Jump analysis — exit altitude, freefall time, speeds and glide ratio, with
automatic detection of the flown segment.
• 3D replay — see the flight path from any angle.
• Winds aloft — wind by altitude, so the numbers describe the air you were
actually in.
• Firmware updates over the air for the custom ENGO HUD firmware.
WHAT IT DOES NOT DO
No account. No advertising. No analytics, and no tracking of any kind. Your
tracks are files on your phone; nothing is uploaded anywhere. The one thing that
leaves the device is a jump's coordinates, sent to public weather services to
look up the wind — described in full in the privacy policy.
Groundrush is free. Everything listed above stays free.
WHAT YOU NEED
A FlySight 2. For the heads-up display, ENGO 3 glasses running ActiveLook
firmware. The app also opens tracks that are already on your phone, with no
device connected at all.
NOT AFFILIATED
Groundrush is an independent project. It is not made by, endorsed by or
affiliated with FlySight or ActiveLook.
Privacy policy: https://groundrush.io/privacy
Contact: hello@groundrush.io
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Glasses are now picked in the app: HUD & glasses → Glasses lists the ENGO 3 pairs the phone can see, sorted by signal. Tap yours and the FlySight is bound to it and to no other. With firmware 0.0.45 and newer the HUD stays off until a pair is picked, so a fresh FlySight can no longer latch onto someone else's glasses at the dropzone.
• The WIND tab is gone. The wind profile in the jump analysis stays.
• Early FlySight units without a batch key now get their own firmware image from the app.
The developer, Aleksandr Boikov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Aleksandr Boikov
- Size
- 38.1 MB
- Category
- Sports
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Aleksandr Boikov
