This is the free basic version. The interpreter has an "in-app" (paid) upgrade option to the unlimited "PRO" version.
This interpreter app is specifically designed to make communication with deaf-blind persons as easy as possible. It uses speech recognition or simply typing to formulate a short text which can then be passed on to a deaf-blind person by means of vibration in the form of Morse code.
The Deaf-Blind Interpreter also has an audio VU meter with colored LEDs that enable to monitor the speech.
We wish you lots of pleasure and usefulness of this software.
Leidschendam, The Netherlands.