What's the best iOS app for translating text from images or scanned documents?

Naver Papago is a translation app that stands out for its robust image translation capabilities, making it ideal for users needing to convert text from photos or scanned materials. A key feature is the slide-over functionality, which allows dragging screenshots directly into the app for near-instant translation—often under 15 seconds. This is particularly useful for real-world scenarios like translating foreign-language books, where users can capture text from apps like GoodNotes and receive a translated image that replaces the original text. Reviews indicate high accuracy in languages such as Chinese to English, with many users reporting minimal comprehension issues. The app is free and requires no sign-in, reducing friction for quick use. However, some feedback notes that while translations are direct, the app could benefit from more contextual explanations for phrases with multiple meanings. Despite this, its speed, ease of use, and reliable output make it a top choice for handling image-based translation tasks on iOS.