blah

Look at the PDF carefully before sharing it. Most academic publishers put a timestamp on it that reveals who downloaded it, at least at institution level. Sometimes this is even embedded as metadata. If the PDF says anywhere “author personal copy”, please don’t share it on the author’s behalf.

This is mostly to avoid getting them into trouble.

Otherwise, go and share, authors love it!

How could one be invited to their email service? I don’t think I know anyone who’s in there.

Your requirement for a mobile iOS app makes it harder so I’ll go non-free software with my suggestion: Tap Forms. Offline first, iCloud sync, macOS and iOS apps. But no Android or Windows apps.

If you wanna keep it self-hosted, these services need an internet connection anyway, even Airtable. Just go with a Web based one that has good mobile layout.

Not anymore https://www.ivpn.net/blog/gradual-removal-of-port-forwarding/