Google TalkBack is a wonderful app for blind and vision-impaired peoples. In-fact, even for a normal eyesight, it can be a useful app if you want to do a eye-free operation of your phone. Many peoples are not aware of it although it is available in your phone. It come pre-installed in Android platform. Nevermind if you don't have it, you can it at play store
https://play.google.com/store/apps/details?id=com.google.android.marvin.talkback&hl=en
With my experience, I think its still it in early days and we may see improvement in future.
