If you plan to use the PDF editor on your Mac exclusively, you can opt for a one-year, two-year, or lifetime license. PDFelement also supports iOS, iPadOS, Windows, Android, and the web ...

but this is an entirely free version of PDFelement that you can use on your iPad or iPhone to read, edit, annotate, convert and sign PDFs. You just need to register with Wondershare to use the app.