Agenda’s free version is remarkably functional. The core functionality is all there. The paid version is about workflow improvements. In fact there’s not really anything in the paid version that’s not already in the free version in a basic form.
Here’s my experience…
“Neat, it shows all my events from all my calendars on the side bar (free). But, I’d really prefer not to clutter it up with everything on my calendar. Maybe I’ll upgrade so I can choose which calendars get displayed."
“Oooh, I love how I can include pictures in my notes (free). I just wish I could see them better on my roomy iPad screen. Upgrade is looking like more of a possibility…"
(moves a note to the top) “Man, it’s really convenient how I can have dated notes in chronological order, with undated notes inserted wherever I want (free). I really want that note to stay on top though, even when I add a new note or reverse the sort order. $25 for a year of upgrades looks like a pretty good deal.”
“Searching based on dates, tags, and text is really slick (free). Too bad I have to keep re-entering them… each search provides me with a really useful view of my notes. Okay, Agenda. Take my money.”
Bottom line: if you start using Agenda free and find it useful, but keep bumping into its limitations, you will love the paid features. If Agenda free doesn’t really connect with you, paid isn’t going to change that. imo.