Do you want to hide your private conversations? Worried about spam SMS? Worried on your messages checked by others, then Calculator Pro+ is for you. It saves SMS/MMS of secret contacts behind calculator app. To keep secret messages of particular number, add it as Private Contact. After that when any new message received from that contact, it directly move inside application. Its easy to use and keeps user conversation secret. Your SMS conversation is % SECRET and secure. It also provides free texting between users. Just Sign-In with your number. Send unlimited text, audio, photo and location details to another user. Full of emoj characters ( emoj support), useful to represent emotions. Android OS version . & above need to set AdvanceSMS as default SMS app for native messaging support.