Balloon Burst · Android · iPhone · iPad
Hear the CW. Burst the balloon.
Recognise characters, groups, words or callsigns before the balloons stack up. Turn a few spare minutes into useful CW practice.
Paid app. Your purchase supports OpenShack.
Try free in your browser →
What you can practise
- Practise single characters, groups, words or callsigns.
- Type what you hear or send the answer in keying modes.
- Adjust practice to the characters and speed you want to learn.
- Chase personal bests and publish eligible competition results when you choose.
Keyboard or your own paddle
No Box is needed to start. To use your own paddle or straight key, connect an OpenShack Box: Android supports USB, Bluetooth LE or Network Box; iPhone and iPad support Bluetooth LE or Network Box. Compatible Box firmware is required.
More about the Box →An app purchase supports the project.
Apps are purchased individually in the relevant store. Your purchase supports OpenShack development. The Windows license and Box are separate products. The app interface is in English.
Practice runs locally in the app. MorseChat and online leaderboards need Internet access. You can try the browser version before buying.