This isn't just a calculator. Click"123+=" button,you will come into a private message space,if you set the phone numbers, their SMS,MMS and calls will be got privacy protection.Even you can hide app icon , no one can find it but only you .Problems? Wait! Contact us at firstname.lastname@example.org before leaving a bad review. We're quick to respond and fix your problems.*** Hide app's icon ***Once enable hide app's icon feature , you have to call your set up code to open the app. Opening your phone app and dialing the code and pressing the call button. (NOTE: the code is not the calculator interface login code ) .If use hide app's icon feature can't open the app, DON'T UNINSTALL THE APP IMMEDIATELY , IF YOU DON'T WANT TO LOST YOUR ALL CONTACT AND MESSAGES , pls email me , I will help you , maybe this feature some phone can't use . ********* Login problem ***If after update can't login the app , pls try default password 123 , still can't login , email me .********* About MMS ***MMS(Pictures messages) default is disable,need enable in settings. And send mms(Pictures messages) can't get a delivery report ,pls CONFIRM this will not charge you extra fees. And I can not sure anyone can receive MMS(Pictures messages) , because different carrier has different receive mms (Pictures messages) settings , I can not test all.******If you are reading this, you may already know the importance of protecting your smartphone privacy. Police and airport security can now search your smart phones without warrant. Phone passwords and security features can be easily defeated. Someone may borrow your phone for emergency calls. You friends, and family may check your phone messages without your permission. You may lose your phone..There are so many scenarios where you are not in possession of your phone. Now it is time to protect and lock your personal private data, hide your text or picture messages, call logs and records, and secret!Compared to other instant messaging and chat clients. Our app has dual layers of privacy. Our faked app name and icon is the first layer of privacy: security through obscurity. It does not even give a hint that this app is for messaging. With added password protection, it is just impossible for a stranger to get to your guarded SMS messages.Permissions Description1.YOUR ACCOUNTS• DISCOVER KNOWN ACCOUNTS• VIEW CONFIGURED ACCOUNTSThis permissions ONLY use for verify donated user , NOT to any other users .2.YOUR LOCATIONThis permissions use for "I'm here" function.3.YOUR PERSONAL INFORMATION• READ CONTACT DATA• WRITE CONTACT DATAThis permissions use for "Add from contacts" function.4.YOUR MESSAGES• READ SMS OR MMS• EDIT SMS OR MMS• RECEIVE SMS• RECEIVE MMSThis permissions use for protection your messages .