For any particular platform / operating system? Looks like OCRmyPDF is largely targeted at linux but can install on OS/X and Windows with some third party support (e.g. Python, Homebrew/Cygwin...). There are a lot of other OCR apps if you find OCRmyPDF difficult to use. If you have an iPhone, for example, there is Elucidate which also uses the Tesseract OCR engine.
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