Groundspeed vs MantisX
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!
MantisX
This training system analyzes your shotgun shooting mechanics using data collected by a separate sensor. It provides diagnostics to help you improve your accuracy and performance.
- Shotgun shooting improvement
- Sensor data analysis
- Shooting mechanics diagnostics
- Performance tracking
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MantisX is a training system that helps you improve your shotgun shooting. Use of the app requires a MantisX Sensor which can be bought here: http://www.mantisx.com . It attaches to our detachable rail adapter. The internal electronics of the MantisX Sensor collect movement data before, during, and after your shot. The app analyzes the data and diagnoses your shooting mechanics.
Screenshots
Verdict
The clearest difference is price: MantisX at Free against Groundspeed's $0.99. MantisX also leads on rating (4.6 vs 1.0) and update cadence (every 2 months vs every 57 months). On ads, in-app purchases 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
MantisX is free to download; Groundspeed costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MantisX holds the better App Store score, 4.6 against 1.0. Both are backed by a comparable volume of ratings — 2 and 8 respectively. Written reviews point the same way: 86% of Groundspeed's written reviews are positive against 100% of MantisX's.
Groundspeed ships an update every 57 months, MantisX every 2 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | Groundspeed | MantisX |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 1.0 (2 ratings) | 4.6 (8 ratings) — better |
| Positive reviews | 85.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 | 8 — better |
| Update frequency | Every 57 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 184 MB |
| Age rating | 4+ | 4+ |
| Developer | Heinrich Schnermann | Mantis Tech LLC |
Customer experience
Groundspeed
MantisX
In-app purchases
Groundspeed
No in-app purchases
MantisX
No in-app purchases
