https://play.google.com/store/apps/details?id=com.njoy.copytext
You can use OCR to scan any latin text from any image or use camera capture photo and convert Otto text.
This works completely offline as it is based on ML toolkit provided by Google. Only constraint with this is it supports languages with only Latin characters
This OCR or image to text converter supports image rotation and cropping so that very specific part of image can me processed
Also this app comes with bunch of other features
Here's the link:
https://play.google.com/store/apps/details?id=com.njoy.copytext