Isn't it possible to talk to Windows' owners and ask them to develop WinPhone further? 
But... We did not call them. Windows Phone is their product. They decide - whether to make it better or to kill it.
As they chose "to kill" - we stopped upgrading/supporting/thinking about/... WinPhone app too. 
Life is beautiful but volatile.

Windows Phone users are joining SafeUM testers team today! Testing of Android and iOS versions is very successful and we want to thank YOU, our users! SafeUM Team is very often asked If there'll be a Windows Phone version of SafeUM. Now we are ready to announce its beta testing.

To participate in testing, you have to leave an application on our site or our official Facebook page. All people, who applied, will get a detailed instruction. We are looking forward to your suggestions, comments and reviews about SafeUM. Authors of the most constructive feedback will get free Premium subscription for a year.

Encrypted messenger SafeUM is a truly secure app. We developed several encryption schemes and algorithms that provide high  cryptographic security level. When you first log in the app, you can generate Public and Private encryption keys based on the Passphrase.

A passphrase is a set of words or symbols known only to you. A passphrase is never transmitted to our servers and is not stored on the device. Be sure to remember your Passphrase, otherwise, you will never be able to get access to the history of your encrypted chat. Only the copy of your Public key is stored on our servers.

Users' information security is a primary task of secure instant messenger SafeUM, that's why we implemented a reliable method of generating security keys. When you first log in the app, you can generate encryption keys based on the Passphrase.

Only the copy of your Public key is stored on our servers, as it's needed  for authentication and verification of your interlocutor. Private key is never sent to SafeUM servers, it's located in the  RAM of your device and is erased when you reboot or turn off  your device. If your interlocutor changes his security keys, you'll  get auto notification and will be able to decide whether or not to continue talking.

SafeUM is the securest multimedia messenger that provides an unprecedented level of personal data protection. This exclusive product was developed by the international team of developers and cryptographers, who worked with Philip R. Zimmermann on the development of PGP (Pretty Good Privacy).  

The programmers of SafeUM developed the unique hybrid system with all the algorithms combined into a single perfect mechanism to protect your personal info and communication. Just imagine - it will take more than 50 years to decrypt one chat! 

Be among the first users of SafeUM! Participate in testing of the innovative secure messenger and become a part of developers professional team.

Make sure you share your comments and reviews in the social networks, using hashtag #SafeUM, as the most active participants will get PREMIUM subscription for a year! We are looking forward to your suggestions, comments and reviews about SafeUM. Become a tester here 

You may ask why you have to pay for some tariff plans? Our messenger is a commercial product. We do not want and will not deceive you and sell your personal information to marketing specialists.

We have invested in our product development without attracting any potential customers donations or engaging any sponsors. Every cent invested was spent on quality, design and exclusive functionality.

We offer you security at the price of a cup of coffee. We respect your privacy and secrets. You keep them safe yourself using SafeUM secure messenger! The encryption system is built in such a way that even we have no access to your correspondence or personal information.

Here it comes - encrypted multimedia messenger. Chat, make voice, video and conference calls, send files using secure data transfer technology.

We implemented the most recent achievements and cutting-edge technologies in IT security to develop cryptographic protection mechanisms in our messenger.

Your private and business information is totally safe and confidential when you use the messenger.
SafeUM eliminates any possibility of data interception and spoofing and also provides the parties' authentication.

When we started developing our messenger we already had its clear architecture and infrastructure in our minds. Design was also greatly discussed.

We decided to design the application interface in a measured, stylish and original way taking into account recent trends in the evolution of shapes and colors.

We finally chose contrast design having selected from the range of calm colors which are not hard on the eyes. When constructing the messenger architecture special attention was paid to its usability. All our buttons are quite informative, elements are clear and functionality helps to solve problems in a quick and easy way.