SwimStart: Reaction Trainer
Nail your start off the blocks
$2.99 · Designed for iPad. Not verified for macOS.
The race is decided before you touch the water. Rehearse the start off the blocks, measure the gap between signal and push-off. Apple Watch too. No ads.
The race is decided before you touch the water. SwimStart is a start-reaction trainer for swimmers: rehearse the start off the blocks, measure how long it takes you to move after the signal, and drive that number down.
A REAL START SEQUENCE
• A countdown, then the "Take your marks" call, then the start tone
• The hold after the call is randomised, so you cannot memorise the timing
• Reaction time is measured on a monotonic clock, so your numbers compare fairly
• Move too early and it is flagged as a false start — exactly like at a meet
TRACK YOUR PROGRESS
• Every attempt is saved with its date, reaction time and false-start flag
• See your best time, your average and how many false starts you had
• Your full attempt history in one list
SET IT UP YOUR WAY
• Turn the spoken "Take your marks" cue on or off
• Set the countdown length and the range of the wait before the signal
• Choose touch or motion: tap the screen, or leave the device on a stand and move it
ALSO ON APPLE WATCH
• A standalone Apple Watch app — leave the phone in your bag
• Practice, records and settings straight from your wrist
• A haptic cue alongside the sound, which helps at a noisy poolside
SIMPLE AND PRIVATE
No account, no sign-up. Your records stay on your device.
SwimStart is a training aid. It measures your reaction to a signal from your phone or watch and does not replace official starting equipment or a competition timing system.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Louder, clearer starts.
• The start signal is now noticeably louder, and no longer gets quieted down by music playing in the background.
• Choose your start sound: Horn (the two-tone electronic horn used by official starting systems), Beep, or Pistol.
• New volume slider, with a test button so you can set the level before you get on the blocks.
• New pre-signal option: a short beep on each countdown number, then one long beep to step onto the blocks — the same sequence used at real meets — before "Take your marks.
The developer, Netflowers Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Netflowers Inc.
- Size
- 10.5 MB
- Category
- Sports
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
English and 43 more
- English, Arabic, Bengali, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kannada, Korean, Malay, Malayalam, Marathi, Norwegian Bokmål, Oriya, Polish, Portuguese, Punjabi, Romanian, Russian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Vietnamese
- Age Rating
4+
- 4+
- Copyright
- © 2026 netflowers
