CarTest - Performance Tester5.3.0 - App Store

"CarTest" is a tool app that measures acceleration performance of cars, motorcycles.
You can easily measure times such as 0-60 mph, 0-1/4 mile by CarTest.
It is useful for not only measuring full throttle performance but also knowing the usual acceleration on public road for safe driving.
Please use it with safety first. Please comply with the law when using it on public roads.

(How to use)
1. Fix the iPhone (or iPad with GPS) with CarTest installed on the dashboard of your car so that it does not wobble. When using it on a motorcycle, install it on the handlebar or fuel tank.
2. Tap the "Start/Sensing" button or "Start/Countdown" button. After that, instructions will be displayed.
3. If the "Start/Sensing" button is tapped, measurements will be taken repeatedly. Press the "Stop" button to end the measurement.
4. Once the measurement is complete, the latest results will be displayed. The measurement date is also displayed, and the last line indicates the start status as shown below.
- Sensing: Sensing start
- ○Clean: No False with Countdown start
- xFalse: False with Countdown start
5. To view previous results, tap the "＜ Prev" button.

(Button function)
- Stop: Measurement ends. If you tap before the count reaches zero in Countdown start mode, the state before the countdown started will be restored.
- Start/Countdown: The time will start with a countdown and be measured. False start will be checked.
- Start/Sensing: The system detects when the vehicle starts and measures the time. The measurement is repeated.
- Share: A window opens to share the displayed result.
- ＜ Prev: Displays older results.
- Next ＞: Displays results newer than the past results displayed by clicking the "＜ Prev" button.
- km/h / mph: Selects the unit of speed
- ↑ / ↓: Page scroll. These buttons are enable when there are other results behind while viewing history.

(Measurement range)
- km/h: From 0-20 km/h to unlimited every 20 km/h. 0-400 m. 0-1 km.
- mph: From 0-10 mph to unlimited every 10 mph. 0-1/4 mile. 0-1 km.
- Max speed

(Large speed display on the screen)
When in the stopped state (when neither "Start/Countdown" nor "Start/Sensing" buttons are tapped), tap the "Stop" button twice to turn it on and off. The speed is displayed during measurement.

(Start-sensor sensitivity setting)
In the stopping state, tap buttons “Stop" → "＜ Prev" → "Next ＞" → "＜ Prev" → "＜ Prev" to open the setting window at the top of the screen. You can select 5 levels of sensitivity. Please adjust it if there are many false positives or if the response is slow. It is probably not necessary to adjust it.

(Note)
- 1000 cases of measurement results are stored.
- When you uninstall CarTest, the stored measurement results will be deleted.
- CarTest does not work on iPads without GPS.
- If the GPS signal or device reception sensitivity is low, operation may become unstable.
- If the starting acceleration is too small, it may not be measured correctly.
- 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/

Version History The names and placement of the history retrieval keys have been changed. 5.3.0 Sep 3 Made minor improvements and enhanced performance. 5.2.0 Jun 30 Made minor improvements and enhanced performance. 5.1.1 May 28 Made minor improvements and enhanced performance. 5.1.0 Apr 27 Made minor improvements and enhanced performance. 5.0.3 Mar 14 Optimized battery usage for more efficient performance and longer sessions.
Made other improvements. 5.0.2 Mar 1 Usability has been improved by changing the background color when you tap a button.
Other improvements have also been made. 5.0.1 Jan 12 In addition to the conventional sensing start mode, a countdown start mode has been added.
When the selected language for the app is Japanese, the button titles are now in Japanese.
Other improvements. 5.0.0 12/15/2025 Made minor improvements and enhanced performance. 4.0.3 11/24/2025 Minor improvements and performance enhancements have been made. 4.0.1 10/29/2025 Added subscription plans in addition to in-app purchase.
Updated in-app purchase price.
Other improvements. 4.0.0 10/07/2025 Fixed a minor bug and improved performances. 3.2.1 08/07/2025 To make it easier to understand the results display operation, “▼Older" button has been changed to “Results" button. When you tap “Results" button, it changes to “▼Older" button, and the date and time of the most recent results is displayed. You can view past results by tapping “▼Older" button.
Other improvements. 3.2.0 07/06/2025 The dates in the history display have been improved for easier viewing.
Other improvements. 3.1.1 06/06/2025 Changed the timer display. 3.1.0 02/06/2025 Fixed a minor bug and improved performances. 3.0.1 02/04/2025 A timer is now displayed during measurement.
Other improvements. 3.0.0 01/22/2025 Localized for Chinese (Simplified).
Other improvements. 2.4.0 01/05/2025 The dialogue messages have been revised to make them easier to understand.
Other improvements. 2.3.0 12/22/2024 To prevent accidental termination of measurement, a confirmation dialog will appear when you tap "Stop" button during measurement.
Other improvements. 2.2.1 09/07/2024 The sharing function has been improved. 2.2.0 07/08/2024 Fixed a minor bug and improved performances. 2.1.1 02/23/2024 Changed the ready state message.
Other improvements. 2.1.0 02/09/2024 Fixed a minor bug and improved performances. 2.0.2 12/15/2023 Improved battery consumption when in the background without measurement. 2.0.1 04/23/2023