Chances are, if government would make a "secure communication app" it would suck (unlike private companies, government has no interest in making applications us

Chances are, if government would make a "secure communication app" it would suck (unlike private companies, government has no interest in making applications usable because they usually have no competition - if you have to use them, you have to use them). The projects are usually done by external contractors which will implement the unusable project that technically meets the requirements (implementing more is a waste of money). Add cryptography into an equation (cryptography is notoriously difficult to get right), and you have a recipe for disaster.