If you fed up to be worried by call or SMS during sleep or important meeting - this app designed specially for you. Nights Keeper blocks all calls, but "white list" contacts will be able to go through. You can specify separate contacts or groups in your exceptions list. You can create several profiles for different week days and time. In addition to the night profile, you can create the day profile too. It's important for those who work at night or like to take a nap afternoon. If you work by shifts app has solution for you as well. If you decided to take in a movie or have important meeting, you can use "Don't disturb" profile that can be managed by home screen widget. App can automatically send SMS notification to the blocked caller just to let him know that you are ok. And if you are worry about urgent call from a contact not specified in your "white list", you can use "Emergency call" option. In this case caller will go through after several attempts. You can specify night ringtone, special volume level and ascending ring. App can help you to save your battery life by turning off Auto Sync, Mobile Network, Wi-Fi and Bluetooth at night. Some features available only for PRO version. The license can be purchased by in-app billing. Support developer and get all application features on all your devices. Price is about $2. 99. If you have any questions, please, visit our FAQ page first: http://www.nightskeeper.com/? page_id=29.