To send a PDF document to another app, just follow the steps below:

  1. Open the PDF document you want to open in another App.
  2. Open the Share Menu as indicated in the screenshot below. iPhone showing PDF document with Share Menu button highlighted
  3. Tap on Share. iPhone showing Share Menu with Share option
  4. Choose the App you want to open your PDF document with. iPhone showing share sheet with available apps
  5. If your App is not listed, Tap on More. iPhone showing share sheet with More option highlighted
  1. Open the PDF document you want to open in another App.
  2. Open the Share Menu as indicated in the screenshot below. iPad showing PDF document with Share Menu button highlighted
  3. Tap on Share. iPad showing Share Menu with Share option
  4. Choose the App you want to open your PDF document with. iPad showing share sheet with available apps
  5. If your App is not listed, Tap on More. iPad showing share sheet with More option highlighted