I used Pleco on iOS to recognize the characters in the table of contents of a book. The font was a simulation of handwriting, so I was quite surprised at better than ninety percent accuracy. Although, irritatingly, it attempted to recognize 汉字 in the Arabic page numbers.
But the OCR feature has disappeared from the app (and I have a philosophical objection to buying a feature I already bought).
Meaning of text on a picture mentions two online tools. One failed miserably, and the other has a long-expired SSL certificate which I am not willing to bypass.
I've seen things saying that Google Translate can do it, but that they have somehow made it only work on Android devices.
For small samples, I just use the iOS handwriting recognition, but I'd like to put sentences from a book into Anki.