Roller Derby Penalty Timer is the best mobile app created specifically for roller derby officials.

Typical stopwatches can be unreliable and cumbersome to use. Roller Derby Penalty Timer provides a reliable way to track penalties with built-in knowledge of the WFTDA ruleset for those tricky jammer situations. If you're short staffed at practice, managing the full penalty box is no problem!

Features:

Manage any configuration you'd like: two blockers, two jammers, four blockers, or even the full penalty box!

Stop all timers simultaneously between jams.

10 second warning, alerting you to tell the skater to stand up.

Tap-edit allows you to quickly edit a time or add a minute for a double-penalty.

Customizable colors to match the team uniforms.

Auto Airplane Mode for buying the paid version.

1. Click the download button to Downloading Page.

2. For Normal APK File, you can direct download the file, or you can choose fast download the file with our Installer.

3. For Speicial file such as XAPK or BAPK, you must to choose fast download the file with our Installer.

4. When you finish the file downloading, you must allow your phone to install the file from unknown resource.

Major Updates include 30 second penalties and an upgraded interface.
Minor updates include faster code and a faster app in general.