# Coaster Tool — Record roller coaster G-forces

> Record roller coaster G-forces (iPhone/iPad app by YangYuXuan Xiao.)

- Source: https://appshunter.io/ios/app/coaster-tool/id6809840083 (this page in markdown: same URL + `.md`)
- Developer: [YangYuXuan Xiao](https://appshunter.io/developer/1213787716)
- Category: Utilities, Travel
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 8 MB
- Languages: American English, French (France), Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2026-09-29
- Data updated: 2026-10-03
- User reviews in markdown: https://appshunter.io/ios/app/coaster-tool/id6809840083/reviews.md

## What is Coaster Tool?

Coaster Tool helps roller coaster enthusiasts record and revisit every ride. Capture motion data with iPhone or Apple Watch, then view G-force curves, the analysis range and the trajectory on iPhone.

【Record the Ride】
Record motion and location data, then add a name, park, seat and notes to each ride. Apple Watch supports independent recording and syncs the result to iPhone.

【Understand G-Force Changes】
View longitudinal, lateral, vertical and combined G-force curves, along with peak values and ride statistics. Select an analysis range and adjust the train coordinate reference with automatic or manual calibration.

【Replay and Compare】
Review readings and positions along the timeline, compare curves from two recordings, add photos to replays, and organize your history with favorites, search and sorting.

【Explore 2D/3D Tracks】
After calibration is complete, view the 2D and 3D trajectories derived from GPS and motion sensor data; these trajectories are intended solely for reviewing your experience.

【Keep and Share】
Export JSON, CSV and shareable images, with support for importing and exporting four-array force JSON. Records are stored on the device.

Available in Simplified Chinese, Traditional Chinese, English and French, with support for the system’s Dark Mode.

Usage tip: Follow the attraction’s rules for carrying and securing devices, and do not operate your device during the ride. Measurements depend on device mounting, sensors and location conditions. They are not intended for safety certification, medical decisions or professional engineering measurement.

Terms of use(EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy policy: https://yangyuxuanxiao.github.io/CoasterToolWeb/en/privacy.html

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 100 recordings | $0.99 | one-time |
| Unlimited recordings | $9.99 | one-time |



## Version history (last 1 release)

### 1.1.0 — 2026-09-29

No release notes.

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-03.*