PDFs are extremely common. It is kind of remarkable that files that can interact with them fully aren’t nearly as easy to come by. Sure, Adobe has Acrobat, but that’s a subscription that is, at its cheapest, still over $200 for a single year.

If you want an app that can edit, annotate, and convert PDFs that you don’t have to pay for every month, then check out this lifetime subscription for PDF Expert. There are no recurring costs of any kind, and it’s on sale for $79.99 (reg. $139).

PDF expert packs a lot of different tools into one easy-to-navigate interface. You can edit PDFs by changing the text, inserting images, or adding links. You can annotate to highlight or comment on different areas. You can also merge, re-arrange, or split PDF files. PDF expert can also convert to and from JPG, PNG, Word, PPT, and Excel files.

Working with an older file? The OCR scanner can recognize almost any text and turn it into a searchable document. You can even enhance scans and remove shadows.

If you don’t want to pay every month to access files you’ll need forever, then get a lifetime subscription to PDF Expert for $79.99.