Straight answers when you need them
Find the main lunaPDF workflows, file locations and privacy safeguards, or contact support if an error keeps you from completing a task.
Where are processed files saved?+
New outputs save to Documents/lunaPDf by default. You can choose a different folder, or restore the standard location, from Processed Folder in Settings.
Does lunaPDF upload my documents?+
No. PDF and image processing stays on your Android device. Smart scanning is supplied through compatible Google Play services and its scanner component may need to be installed or updated.
Why did Compress PDF save nothing?+
lunaPDF keeps a compressed output only when the completed file is smaller than the source. If no useful reduction is possible, it reports that the PDF is already optimised and avoids saving a larger copy.
How do I annotate a scanned document?+
First use Searchable PDF to add an invisible text layer. Then open the result in Read & Annotate to select text and apply highlight, underline, strike-through or comments.
Can I take a screenshot inside the app?+
No. Screenshots, screen recordings and recent-app previews are blocked while lunaPDF is visible to reduce accidental disclosure of documents.
What is included in an error report?+
Only the affected tool, a safe error code and basic app, Android and device details. The report excludes PDF content, filenames, paths, passwords, signatures and annotations.
Send a safe support request.
Use the error popup inside lunaPDF when possible. It includes useful technical details without attaching your document.