Looks good but few options unclear

Few options are confusing. for example:
1. I don’t know when my chats are secure encrypted and when they aren’t. in IOS that feature has UI, here its unclear.
2. Nobody seems to had realized that putting two Telegram apps in the App Store would raise the questions and failed to explain what are the differences besides UI
3. Telegram gives username but no way evident to actually invite people with that username; or even to add contact with that username.
You get the username link but clicking the send message does nothing. Safari completely fails to even load that telegram.me/username page

Konfigurator about Telegram Lite, v0.9.24