# Chronocurl > Laser stopwatch system for curling players to measure rock speed and trajectory. (iPhone/iPad app by Guy Simard.) - Source: https://appshunter.io/ios/app/chronocurl/id1124720227 (this page in markdown: same URL + `.md`) - Developer: [Guy Simard](https://appshunter.io/developer/1124720226) - Category: Sports, Utilities - Price: Free - Age rating: 4+ - Requires: iOS 12.0 · 34 MB - Languages: American English - Released: 2016-09-02 - Data updated: 2026-06-11 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/chronocurl/id1124720227/reviews.md ## What is Chronocurl? Chronocurl is a laser stopwatch system useful to calculate relevant information for curling players. The curling delivery is a complex process. In order to progress, it is very important to get accurate feedback in order to quantify the diverse parameter composing the delivery. Three main parameter define the trajectory of a curling stone: the direction, the rotation speed and the linear speed of the rock. Chronocurl quantifies the linear speed of the curling rock when it cuts the laser beam. Using the value of speed, the player can easily work on his consistency without having to refer visually to the distance travelled by the rock. The app lets you read speed data in numerous units such as km/h, mph, m/s. The app also allow conversion of speed data at the hog line into approximation of commonly used split times such as back-line to hog-line or T-line to hog line. Here are some features : All Speed Units : Free and Pro Version Dual display : Free and Pro Version Detail display : Free and Pro Version Rock Circumference Setting: Free and Pro Version Between shot timer : Free and Pro Version Hog to hog split times : Pro Version Audio feedback : Pro Version Side by side practice : Pro Version Multi-Chronocurl : Pro Version Email of practice data : Pro Version Multiple Rock circumference: Upcoming Pro Version ## Key features - Laser stopwatch system - Quantifies linear speed - Measures rotation speed - Analyzes delivery direction - Speed data in multiple units - Hog line speed conversion - Between shot timer ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/chronocurl/id1124720227/reviews.md ### 5/5 — Justin H *2024-12-02* The Chronocurl is a fantastic tool. Very helpfull for individual practice so you can get feedback that you otherwise wouldn’t get by yourself. It’s very accurate and highly recommended! 👍👍 ## Frequently asked questions about Chronocurl ### What is Chronocurl used for? Chronocurl is a laser stopwatch system designed to help curling players quantify key parameters of their rock delivery, such as linear speed and rotation. This feedback aids in improving consistency and performance on the ice. ### What are the key features of Chronocurl? Chronocurl offers features like all speed units, dual display, detail display, rock circumference setting, and a between-shot timer. Advanced features like hog to hog split times and audio feedback are available in the Pro version. ### Can Chronocurl measure speed in different units? Yes, Chronocurl allows you to read speed data in numerous units, including km/h, mph, and m/s. This flexibility caters to different user preferences and regional standards. ### Does Chronocurl offer any practice modes? The Pro version of Chronocurl includes a 'Side by side practice' mode, allowing for comparative training. It also supports 'Multi-Chronocurl' for advanced practice scenarios. ### How does Chronocurl help with performance analysis? By quantifying linear speed and providing data conversions to common split times (like hog to hog), Chronocurl gives players objective feedback. This allows them to work on consistency without relying solely on visual cues. ### Is Chronocurl available on multiple devices? Chronocurl is supported on iPhone, iPad, and iPod devices. It is designed for Apple's mobile ecosystem. ### How often is Chronocurl updated? The app was last updated on August 29, 2023, with version 5.2. This indicates a commitment to ongoing development and improvements. ### Does Chronocurl have ads? No, Chronocurl does not contain advertisements. The application is ad-free, providing an uninterrupted user experience. ## Version history (last 5 releases) ### 5.2 — 2023-08-29 Improved Bluetooth communication Display warning messages in yellow when the system tries to fix the problem. Added sensor sensitivity adjustment system. Allow to customize the name of the Chronocurl. Modification of the vibration detection according to the diameter. ### 5.0.1 — 2021-11-09 Completely redesigned application. ### 5.0 — 2021-11-07 Completely redesigned application. ### 2.2 — 2018-04-30 This app has been updated by Apple to display the Apple Watch app icon. Adjustment of parameters min max circumference 24-42 inches ### 2.1 — 2017-01-05 1. Addition of a configurable alert when stone crosses laser. 2. Calculated hog-hog value. Uses empirical calculation (Back-line to hog speed - 1) * 5. 3. Increase the maximum circumference to 38 inches. 4. Correction of the Chronocurl selection issue after a disconnection occurred. 5. Problem with font size. Detected on iPhone 6s ## Apps similar to Chronocurl | App | Rating | Price | Category | | --- | --- | --- | --- | | [Curling Scoreboard](https://appshunter.io/ios/app/curling-scoreboard/id1471090980) | 5.0 (2) | Free | Sports | | [GGGolf](https://appshunter.io/ios/app/gggolf/id520467221) | 5.0 (1) | Free | Sports | | [CoachNow: Sports Coaching App](https://appshunter.io/ios/app/coachnow-sports-coaching-app/id596598472) | 4.9 (3,344) | Free | Sports | | [SquashGhostLite](https://appshunter.io/ios/app/squashghostlite/id1603372009) | — | Free | Sports | | [DCO Central](https://appshunter.io/ios/app/dco-central/id1499909766) | — | Free | Sports | | [Disc Golf Caddy Pro](https://appshunter.io/ios/app/disc-golf-caddy-pro/id1029793833) | 4.4 (223) | Free | Sports | ## More apps by Guy Simard - [Chronocurl Pro](https://appshunter.io/ios/app/chronocurl-pro/id1154050351) All apps by Guy Simard: https://appshunter.io/developer/1124720226 --- *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 2026-06-11.*