it's not my app, i just compiled it, i only include aarch64 versions of leptonica and tesseract and their respectiv devel packages, because packages for the other two sailfish architectures are available here: http://repo.merproject.org/obs/home:/skvark/, here is the description from github :

Textractor

Textractor is an OCR application for Sailfish OS. Main features:

OCR can be run on:

• an image taken with the app
• an image selected from the device
• a PDF file (one or multiple pages)

Cropping is supported in any reasonable quadrilateral arrangement and perspective correction is applied for the selection. User has access to advanced image preprocessing settings.

Found text can be edited or copied to clipboard. As SFOS is a true multitasking OS, the whole OCR process can be run on background while user can use the device for other purposes at the same time.

sources: https://github.com/skvark/Textractor

my fix for a build error where a headerfile was referenced camelcase, whereas its filename is lowercase: https://github.com/smatkovi/Textractor