Groundspeed vs Skyduck
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Groundspeed
This app provides an extra-large display for ground speed, ideal for extreme sports like parachuting and paragliding. It also functions as a versatile speedometer for activities such as skating, cycling, running, or in a car, with customizable units and display options.
- Extra-large display for ground speed
- Supports parachuting, paragliding, skating, cycling, running, and car use
- Switchable units: mph, knots, m/s, km/h
- Adjustable decimal places
- Tap controls for MIN/MAX reset and help
- Rotation lock feature
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Groundspeed is a speedometer with an extra big-sized display - designed for parachuting and paragliding. As the name of this app implies, the displayed value is the speed above ground, it's not the air speed. It's nice with other sports too: skating, cycling and running. Or it can be a cool speedometer in your car. The unique 16-segment-digits are the fundament of the extraordinary design. The App offers a variety of controls: - Tap MIN and MAX to reset these values. - Tap the unit to switch the units to mph, knots, m/s and km/h. - Swipe the big speed digits to the left to add one decimal place. - Swipe the big speed digits to the right to hide one decimal place. - Tap the title to show help. - Tap the arrows in the lower right to lock rotation (be sure to lock rotation before you put on your gloves). WARNING: skydiving and paragliding are high risk activities. It's more important to stay safe than to read your speed!
Skyduck
This app automatically logs your skydives using phone sensors like GPS and altimeter. View detailed statistics, 3D jump visualizations, and collect digital signatures. It's designed by skydivers for skydivers to simplify jump tracking.
- Automated skydiving logbook
- GPS and sensor tracking
- 3D jump visualization
- Detailed statistics and graphs
- Digital signatures
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Skyduck - automated skydiving logbook app. You can add jumps manually or track them with your phone. We are using GPS, altimeter, and motion sensors to get the most accurate data possible. FEATURES • Automated skydiving logbook • Digital signatures • 3D visualization of your jump • Detailed statistics and advanced graphs Try our app and share your feedback! You can leave your comments & feedback within the app (More->Feedback) or send us an email at: team@skyduck.app We have been reviewed by USPA and are fully compliant as a digital logbook: https://uspa.org/Safety-and-Training/Resources/Logbook-Apps Terms of use: https://skyduck.app/tos.html You jump. We do the rest! Created by skydivers, for skydivers.
Screenshots
Verdict
The clearest difference is price: Skyduck at Free against Groundspeed's $0.99. Skyduck also leads on rating (4.8 vs 1.0) and update cadence (every 5 weeks vs every 57 months). Groundspeed's advantage is in-app purchases (none vs 3) and iOS requirement (16.0 vs 18.6). On review sentiment, ads and device support 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
Skyduck is free to download; Groundspeed costs $0.99 up front. Skyduck sells 3 in-app purchases, starting at $4.99 per month. Groundspeed asks for nothing beyond the download.
Skyduck holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Skyduck has 175 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 86% of Groundspeed's written reviews are positive against 80% of Skyduck's, so the app with the better star average is not the one people write more warmly about.
Groundspeed ships an update every 57 months, Skyduck every 5 weeks. Both last shipped on October 29, 2026.
| Parameter | Groundspeed | Skyduck |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 1.0 (2 ratings) | 4.8 (175 ratings) — better |
| Positive reviews | 85.7% of reviews — better | 80.0% of reviews |
| Number of ratings | 2 | 175 — better |
| Update frequency | Every 57 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 16.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 1 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Heinrich Schnermann | Igor Kamenev |
Customer experience
Groundspeed
Skyduck
Bugs and requests
Groundspeed
Not enough reviews yet to summarise bugs or requests.
Skyduck
Reported bugs
9 issues- Constant TLS error on login
- Crashing with new iOS versions
- Forgot password email not sent
- No confirmation button for signing jumps
- 3D function not working
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- Cannot connect to server
- GPS and altitude data not recorded
- 3D satellite images not rendering
- SSL error on login
Requested features
4 requests- Update for iOS 26
- Apple Watch app
- Support for other languages (Russian mentioned)
- Barometer integration for jump tracking
In-app purchases
Groundspeed
No in-app purchases
Skyduck
- Skyduck PRO$4.991 Month
- Skyduck PRO$99.991 Year
- Lifetime access$199.99
