SwimStart: Reaction Trainer
Nail your start off the blocks
S$ 3.98 · Designed for iPad. Not verified for macOS.
Win the race before you hit the water. Train the split-second off the blocks and measure your reaction to 1/100s.
Races are won in the first split-second. The moment between the starter's command and your launch off the block decides how far ahead you are when you hit the water. SwimStart trains that exact instant, over and over, in a realistic race setting so your reaction becomes automatic.
■ Starts are won by reaction
A faster start doesn't come from thinking harder. It comes from drilling the gap between the signal and your move until it disappears. SwimStart lets you rehearse that gap as many times as you want and measures your reaction down to 1/100 of a second.
■ A real start experience
SwimStart recreates the tension on the blocks:
- The English voice command "Take your marks" calls you to the line.
- A wait follows before the start beep. Choose a random wait for true, unpredictable tension that breaks the habit of anticipating, or a fixed wait when you want a steady rhythm.
- An adjustable countdown leads into the command so you can settle into position.
When the beep sounds, you launch. SwimStart captures how fast you reacted.
■ Two measurement modes
- Touch: tap the screen the instant you hear the beep.
- Motion: the accelerometer detects your body's movement, so you can practice an explosive launch with your hands free.
Pick the mode that fits how and where you train.
■ False-start detection
Move before the beep and SwimStart flags it as a false start with a buzzer, just like a real meet. Learn to hold the line and fire on the signal, not before it. The buzzer can be turned off whenever you prefer a quieter session.
■ Records that track your progress
Every attempt is saved automatically:
- Best reaction time
- Average reaction time
- False-start count
- Total attempts
- Full history
Watch your numbers improve session after session and see the proof that your starts are getting faster.
■ Apple Watch support
SwimStart runs standalone on Apple Watch, so you can train right at the pool with nothing else in hand, and it works on iPhone and iPad too. The screen stays on during practice so the command and timing are always in view.
■ Who it's for
- Competitive swimmers chasing a faster, sharper start
- Junior swimmers practicing on their own
- Coaches drilling athletes on reaction and false-start discipline
- Anyone who wants to train their reflexes
Step onto the blocks, wait for "Take your marks," and react. Sharpen the start that wins races.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
SwimStart now speaks your language. The app is fully localized in 34 languages, including English (US), so you can train in the language you're most comfortable with.
We've also made minor stability improvements for a smoother experience.
Thank you for training with SwimStart. Keep sharpening those starts.
The developer, Yoshiaki Hirokawa, 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
- Provider
- Yoshiaki Hirokawa
- Size
- 6.7 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 32 more
- English, Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Malay, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Netflowers Inc.
