Not for an Android OS. There is no exit, end, or quit in the application. The application remains storage resident. I must use the OS to force its termination. This behavior is like a virus. That behavior is suspicious. Removing app.
Developer reply
Like all Android apps, the app stays open until you close it using normal Android gestures. The app is inactive when it's not the foreground app. When closed, it consumes less than 5MB for the app and saved input. If you'd like to discuss how the app can be improved, please email info@pohperformance.com.