Support

Contact maga40@naver.com with your Android version, Pagepair version and a short description. Please avoid sending confidential PDFs unless you explicitly intend to share them.

Import

Choose an original and revised PDF through Android Files. Each may contain 1–24 pages and be up to 16 MiB. Password-protected and restricted PDFs are not supported. File access depends on the chosen Android document provider.

Comparison

Pages match by index. A shared scale preserves renderer size differences. Longest comparison edge: 1400 pixels. A pixel differs if any RGB channel delta is greater than 42. A ratio describes canvas pixels, not changed text. Added or removed pages have no ratio. PdfRenderer dimensions are integer points, not a forensic PDF box audit.

Files and notes

Up to 20 pairs and 256 MiB of private source copies. Export source PDFs before deleting pairs or uninstalling. CSV/JSON preserve full notes when included. PDF contains labelled note excerpts and raster images, without searchable text. The JSON manifest does not restore a library. Save through Android Files; saving does not deliver a file to a recipient.

Recovery

If the index cannot be read, it is preserved and normal writes are blocked. Save its unreadable copy from Help before resetting links. Reset creates an empty index, preserves private source folders and does not automatically restore links or repair PDFs. Clear cache removes temporary selections, previews and generated exports, while saved pairs remain.

Report headings and some validation messages are English.