kanban-like board
I really like the pricing model. Drag is a bit more expensive, but also covers more than just Gmail, and its pricing covers all of that.
One thing I find interesting in Drag is kanban-like boards for organizing emails. I think it could be useful to have this feature in Simplify (judging from screenshots, I didn't see this feature in Simplify). Simplify is gmail-specific and this would be a nice fit for people looking for gmail-specific organization without paying for all the other stuff like in Drag.
Drag has some other gmail-specific features to borrow ideas from too.
Thanks for the feature request. Adding a kanban board view for the inbox would be a pretty large undertaking and would probably only be possible if I asked for full API access (something I've tried to avoid for maximum security). I'll add this to my someday-maybe list if I ever add the option to give Simplify full API access to enable more features. Thanks!