Three PDFs in Drive, one client who wants them as a single file. Android's Files app doesn't merge. Drive doesn't merge. The Play Store offers ten different apps that merge, plus subscriptions.
Chrome merges. For free.
The flow
Open Chrome, go to Flint's merge tool. Tap Add files and pick the PDFs from Drive, Downloads, or wherever they live. Drag thumbnails to reorder. Hit Merge. Download the combined PDF.
It's the same flow as desktop — Android's just running the same web app on a different screen.
Reordering pages after merge
If the combined document needs page tweaks — drop the cover page from PDF 2, move PDF 3 to the front — use reorder PDF pages or delete PDF pages on the merged result. Or, fix each source file first then merge. Both work; depends on what's faster for the document.
Sharing the merged file
Download lands in your Downloads folder. Share via Gmail attachment, Drive upload, or any messaging app's file picker. If the merged file is large, compress it before sharing.
FAQ
How many PDFs can I merge at once?
Dozens. Practical limit on Android is the source files' total size — a couple of gigabytes is fine on Wi-Fi, slower on cellular. For everyday use (5–20 files at typical sizes), it's instant.
Will the merged PDF lose hyperlinks?
No. Flint preserves internal links and bookmarks from source PDFs. The merged file behaves as one document with the original navigation intact.
Can I merge images with PDFs?
Merge expects PDFs as input. Convert images to PDF first (Android's print-to-PDF works, or Flint's image-to-PDF converter) and merge the resulting PDFs.
Stop emailing five PDFs and apologising. Merge them in Chrome and send one.