I've tried implementing OCR feature using Tesseract* into aXes Mobile customization.
*For more information about Tesseract:
Video is here:
https://drive.google.com/open?id=1zDKlA ... bDCbmxBlVn
In my testing, it ran on my Android smart phone, but it aborted on iOS devices all the time.
Attached save file contains the sample project shown in the video above.
(Save file) HTH,