1. There was a mistype in the GitHub link, now
$1.
2. Thank you for the question about TalkBack. Blind Communicator can launch any App installed in your device in order to use it with TalkBack. The main difference with TalkBack is that Blind Communicator takes care of the complexity that could represent a touchscreen for the blind. It also makes of the voice guide a great asset because the user doesn't need to learn how to use the smartphone with different screen gestures. It's also great for small children or elder people because there is no learning curve. They are able to use a smartphone or tablet by simply sliding the finger up or down over the screen. The App will do the rest and the voice guide will tell you the result of every action. For last, the App allows the visually impaired to use a smartphone much faster than with TalkBack because the main features of a mobile device (calls, music and messaging) are presented with a simplified user interface in order to provide a faster browsing and a much better user experience for the blind.
3. The quality of localization (translation, voices) is really important, that's why professional localization company with a significant experience in this field will be involved. That's why Blind Communicator needs the money.
Hope this helps. Should you have any questions, please let me know! Thank you!