react to the unpredictable

the reaction training timer.

Train your reactions solo with randoro. It fires random beeps that force you to react and stay alert throughout your workout.

iOS App Store release · 1 September 2026
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Join the iOS TestFlight Beta

randoro keeps you accountable when you train alone. Set your rounds and start, and the beeps come at random intervals within the bounds you choose.

The cues play through your phone, headphones, or a speaker, and keep going in the background and on the lock screen so you can pocket the phone mid-round. They also play alongside Spotify, so you can train to your own music.

What it does

Support

Questions, bugs, or feedback are welcome. Reach out any of these ways: