Sprint Start Trainer1.8.0

Practice track sprint and swimming starts with just one phone.

Starter Kit is a start-training app for sprinters, swimmers, and coaches. It does more than play start signals: it lets you measure reaction time on video and review start technique. In Timing and Random modes, each video frame displays the time relative to the moment the start sound plays, with that moment set to zero. Read the displayed time on the frame where the athlete first moves to measure reaction time, then review technique in the same video. With fixed or randomized signal intervals, you can practice track block starts and swimming dive starts on your own or with a team.

WHO IS IT FOR?

. 100 m and 200 m sprinters
. Track athletes who want to practice block starts
. Swimmers who want to practice dive starts and improve their response to the start signal
. Track-and-field coaches and swimming coaches running start drills
. Athletes who want to improve reaction time and start technique

KEY FEATURES

■ Video reaction-time measurement and technique review
In Timing and Random modes, Starter Kit adds a timer to every video frame, using the start signal as zero. Read the value displayed on the frame showing the athlete's first visible movement to measure reaction time and review start technique. Videos can be saved to Photos, and recording can continue for up to 90 seconds after the start sound finishes. With up to 90 seconds of recording, you can also use the on-video timer to measure an accurate start-to-finish time.

■ Three start signal sounds
Choose a pistol sound, swimming start beep, or electronic start sound to match your sport or training session. The swimming beep makes Starter Kit useful for swimming start practice as well as track sprint starts.

■ Timing mode: fixed intervals
Set the timing between “On your marks,” “Set,” and the start signal. Repeat the same start sequence for individual or team practice.

■ Random mode: randomized intervals
Randomize the intervals between “On your marks,” “Set,” and the start signal. The timing varies within your chosen range so athletes can practice reacting without anticipating the signal.

■ Manual mode: individual cues
Play “On your marks,” “Set,” and the start signal separately. Use it for coach-led or group drills, or play the swimming start beep on its own at the pool.

■ Automatic repeat starts
In Timing and Random modes, run start sequences repeatedly at an adjustable interval for efficient practice sets.

Starter Kit turns your phone into a portable start-training tool for the track or poolside-no dedicated starting system required.

Automatic repeat starts and custom recording durations require an upgrade.

Version History You can now choose from three start signal sounds: Pistol sound, Swimming beep, and Electronic start. 1.8.0 17h ago Minor UI improvements. 1.7.3 Sep 13 Fixed a crash that could occur when a recording stopped and was cancelled at the same time. 1.7.2 Sep 9 - Recording after the start signal can now be set up to 90 seconds. 1.7.1 Aug 30 - Added automatic repeated starts for Timing and Random.
- Added an option to choose how long recording continues after the start signal.
- Improved the layout and video recording experience. 1.7.0 Aug 29 Fixed an issue where videos could not be recorded 1.6.4 Jul 3 Fixed an issue where videos could not be recorded 1.6.3 Jun 27 Minor bug fixes 1.6.2 Jun 24 Minor bug fixes 1.6.1 May 28 Manual start feature has been added! 1.6.0 May 24 Improved in-app translations 1.5.1 May 18 Added video recording feature 1.5.0 May 14 Support for iOS 26 1.4.0 09/18/2025 Minor UI fixes 1.3.2 08/21/2025 Minor bug fixes and feature adjustments 1.3.0 07/19/2025 Multilingual support 1.2.1 07/02/2025 Various start sounds can be selected 1.2.0 06/13/2025 Minor functional changes 1.1.1 02/22/2024 ・Bug Fixes
・Change of start sound 1.1.0 01/26/2024 Several bug fixes 1.0.1 12/18/2023 1.0 12/11/2023