G FORCE vs DragTree
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
G FORCE
Transform your iPhone into a vehicle G-force meter to measure acceleration, braking, and cornering. Features real-time displays, adjustable alerts, and peak hold functionality for detailed analysis.
- Real-time G-force display
- Adjustable audio alerts
- Peak hold monitoring
- Quick calibration
- Session maximum records
- Customizable gauge scales
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G FORCE makes your iPhone or iPod Touch a handy vehicle G-Force meter. A nice looking enhancement to the dash of your car, too. Quantify the G-Force you experience in the vehicle (e.g. during acceleration, braking, drifting, cornering etc) or perform a quick dyno. Its unique "Sound Alert feature" provides alert sound when the g-value exceeded a user selected limit. FEATURES (1) "Quick & Simple Calibration" Simply press the start button and G FORCE takes only about 0.5 seconds to calibrate to your iPhone's tilt angle. (2) "Real Time Display" Two "Linear Gauges" and two "Digital Displays" show the real time lateral (e.g. cornering) and longitudinal (acceleration, braking) G values. (3) "Peak Hold" Adjustable "Peak Hold Duration" helps you monitor peak values. (4) "Graphical Peak Hold Indicators" Distinctive graphical peak hold indicator makes observing peak values a quick glance. (5) "Adjustable Audio Alert" Provides alert sound when the G-Forces exceeded a user preset "threshold". (6) "Adjustable Gauge Scale" "log Scale" and "Linear Scale" helps you utilize the "Linear Gauges" for different conditions. e.g. Use log Scale in "mild" acceleration conditions or use "Linear Scale" in "aggressive" acceleration conditions. (7) "Session Maximum Records" Shows all the maximum G values in the current session. (8) "Large Operation Buttons" Facilitates quick and easy operation. (9) "Theme Switch" Switch between the Classic and Graphite Theme to suit your taste. With its nice interface and unique features, you would like G FORCE even though you may have already got other g-meters like dynolicious or even a hardware equipment.
DragTree
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"DragTree" is an app for practicing real-car drag racing. You can measure drag race times in places where timing equipment is unavailable. Times for 60 feet, 330 feet, 660 feet, 1000 feet, and 1/4 mile are measured using GPS. Starts are determined by looking at a Christmas tree displayed on the screen, just like in competitions. Response times are also measured. A front camera switch allows you to operate the start/stop function while wearing gloves. The front camera switch is especially useful when using this app on a motorcycle. Safety is always the first priority. When using on public roads, please obey the law. (How to Use) 1. Secure the iPhone (or GPS-enabled iPad) with DragTree installed to a stable location, such as the dashboard of your vehicle, where the screen is visible. For use on a motorcycle, secure it to the handlebars or fuel tank. 2. Tap the "Start" button on the home screen to display the Christmas tree screen. If you have not yet upgraded, an information dialog will appear. (Covering the front camera with your finger has the same effect as tapping the "Start" button. This is the front camera switch.) 3. Tap the "START/STOP" button on the Christmas tree screen to begin the countdown until the blue light on the Christmas tree lights up. Tapping the "START/STOP" button before the green light lights up will return you to the time before the countdown began. The "START/STOP" button can be controlled with the front camera switch. 4. Once the blue light comes on, do not move the machine until it is time to start moving. After the staging light comes on, the start timing check will begin. 5. When the green light comes on, it is time to start moving. Response time is measured, followed by all other measurements. A negative response time indicates a false start. The home screen will appear at 660 feet. 6. When the measurement is complete, the results will be displayed on the home screen. 7. To view previous results, tap the "< Prev" button. 8. You can share the currently displayed result using the "Share" button. (Settings) - On-screen driving lane selection (left, right) - Start method selection (PRO, FULL) - Select the time from staging light to amber light (Random, Fixed) - Set the countdown time until blue light turns on - Front camera on/off switch *Turn off if malfunction occurs in dark environments, etc. - Start sensor sensitivity selection *Can be adjusted if malfunction occurs frequently. (Changes not recommended) (Measurement Items) - 60 feet and 330 feet elapsed time and speed measurement - 660 feet, 1000 feet, and 1/4-mile elapsed time and speed measurement - Response time (RT) - RT+ET at 660 feet and 1/4-mile - 0-100km/h and 0-60mph acceleration time measurement (Notes) - Permission to use location information is required to use this app. - Permission to access the camera is required to use the front camera switch. - 1,000 measurement results are stored in memory. - Memorized measurement results will be deleted if DragTiming is uninstalled. - Cannot be used on iPads without GPS. - Operation may become unstable if the GPS signal or device reception sensitivity is low. - Measurements may not be accurate if the starting acceleration is too slow. - The developer assumes no responsibility for any accident, violation, loss or claims by third parties which may arise from the use of this app. Terms of Use: This application is provided under the Apple Standard End User License Agreement (EULA). https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: DragTree at Free against G FORCE's $2.99. G FORCE's advantage is in-app purchases (none vs 3) and iOS requirement (6.0 vs 15.0). On update cadence, 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
DragTree is free to download; G FORCE costs $2.99 up front. DragTree sells 3 in-app purchases, starting at $3.99 per 3 months. G FORCE asks for nothing beyond the download.
G FORCE ships an update monthly, DragTree every 2 months. Both last shipped on October 24, 2026.
| Parameter | G FORCE | DragTree |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 60.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 6.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 3 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Y Lau | Takao Ichimura |
In-app purchases
G FORCE
No in-app purchases
DragTree
- Unlimited measurements$3.993 Months
- Unlimited measurements$5.991 Year
- Unlimited measurements$9.99









