# Groundrush Skydiving — FlySight 2 companion

> FlySight 2 companion (iPhone/iPad app by Aleksandr Boikov.)

- Source: https://appshunter.io/ios/app/groundrush-skydiving/id6801261386 (this page in markdown: same URL + `.md`)
- Developer: [Aleksandr Boikov](https://appshunter.io/developer/6801261388)
- Category: Sports
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 36 MB
- Languages: American English
- Released: 2026-08-31
- Data updated: 2026-09-30
- User reviews in markdown: https://appshunter.io/ios/app/groundrush-skydiving/id6801261386/reviews.md

## What is Groundrush Skydiving?

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


## Version history (last 5 releases)

### 1.2.3 — 2026-09-25

• 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.

### 1.2.2 — 2026-09-13

• Map View: open a track and see its route drawn over a satellite map, seen from above with north up, coloured by speed, with the exit and the landing marked. Switch between satellite and road map, and between the whole file and the detected jump.
• The 3D replay is gone; Map View takes its place.

### 1.2.1 — 2026-09-10

• First connection, explained: the device list now tells you to double-press the FlySight before pairing.
• Firmware check on connect: a newer Ground Rush firmware is offered right away; on stock firmware the app says what the glasses will not do and where to get Ground Rush firmware.
• "Set up differently" now shows both sides, setting by setting.
• FlySight batches B7, B8 and B9 supported.
• Fixed: a first connection could misread the firmware and warn "Unknown firmware".
• Smaller download.

### 1.2.0 — 2026-09-08

Pick a landing zone or reference point straight off a satellite map. The crosshair stays still and the map moves under it, so you can place it exactly on the grass you mean, and it opens where you are standing — which is what you want at a field you have never jumped before.

Coordinates can now be typed or pasted in whatever notation you were given them in: 50°59'34.83"N, N 50 59.581, or 50.992953, with a comma or a point for the decimal. Paste both halves at once and they sort themselves into the two boxes.

The distance warning now measures from this phone rather than from the FlySight, so it works before the logger is switched on.

### 1.1.1 — 2026-09-07

Fixed: exporting a track did nothing on iOS 26. Hold a track and pick Export, or use Share all, and the share sheet now opens as it should - save the CSV to Files, a cloud drive, mail or a chat.

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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 2026-09-30.*