# Groundspeed vs Skyduck

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.

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.

## The numbers

| Metric | Groundspeed | Skyduck |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/groundspeed/id682531292/reviews) | **[4.8 (175 ratings)](https://appshunter.io/ios/app/skyduck-skydiving-logbook/id1459551774/reviews)** |
| Number of ratings | 2 | **175** |
| Positive reviews | **85.7% of reviews** | 80.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 57 months | **Every 5 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 31 MB |
| Requires iOS | **16.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Heinrich Schnermann](https://appshunter.io/developer/663216482) | [Igor Kamenev](https://appshunter.io/developer/910687200) |

## What reviewers say

### Groundspeed

[App page](https://appshunter.io/ios/app/groundspeed/id682531292)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none


### Skyduck

[App page](https://appshunter.io/ios/app/skyduck-skydiving-logbook/id1459551774)

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.

**Highlights:** Automated skydiving logbook, GPS and sensor tracking, 3D jump visualization, Detailed statistics and graphs, Digital signatures

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Skyduck PRO | $4.99 | per month |
| Skyduck PRO | $99.99 | per year |
| Lifetime access | $199.99 | one-time |

**What reviewers like**

- 👍 Great logbook functionality
- 🗺️ Awesome 3D jump visualization
- 📊 Tracks progress and provides jump info
- 🤩 Easy to use interface
- 🚀 Works great for logging skydives

**What reviewers complain about**

- 🐛 3D function no longer works
- 🐛 TLS error preventing login
- 🐛 App crashes with new iOS
- 🐛 No response from support
- 🐛 Cannot connect to server

**Reported bugs**

- 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

**Requested features**

- Update for iOS 26
- Apple Watch app
- Support for other languages (Russian mentioned)
- Barometer integration for jump tracking


## Frequently asked questions

### Is Groundspeed free?

Groundspeed costs $0.99, with no in-app purchases.

### Is Skyduck free?

Skyduck is free to download, with in-app purchases available.

### Which has better reviews, Groundspeed or Skyduck?

Skyduck is rated higher. Groundspeed averages 1.0 out of 5 from 2 ratings, while Skyduck averages 4.8 from 175 ratings.

### Do Groundspeed or Skyduck have ads?

Neither Groundspeed nor Skyduck shows ads.

### Which is updated more often, Groundspeed or Skyduck?

Groundspeed ships an update every 57 months, and Skyduck every 5 weeks. Most recently, Groundspeed was updated on October 29, 2026 and Skyduck on October 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*