"Focus", a Simple App which helps you Concentrate on your work without any Disturbances by completely Disabling / Locking your Phone for a specified time period...
You can take the Easy Mode & take Breaks or just Go Full on with the 'No - Break' Mode!
& Be Productive!
MIUI Users: You need to Grant PopUp Permission, follow below Instructions:
Go to Phone Settings > Installed Apps > "Focus" > Permissions (Permissions Manager) > Display PopUp Window > Accept!
FOCUS uses the 'Device Administrator' permission to Lock your Phone automatically when the Timer starts only if that feature is enabled in Settings, this can be easily Disabled anytime via Settings after it is Enabled!