It's not a critic to Budget Kanban devs, it's a critic to modern UIs and to single-entry bookkeeping in general.
A small example: let's imaging you auto-import your groceries thanks to some supermarkets that offer csv export of tickets. If you track expenses you do not know nothing beside a total amount or at maximum a total amount per vendor. If you track in double-entry you can slice your transactions as much as you want: you have the total amount of groceries, the total amount per vendor, but potentially the total amount of cheese, meet, salad and so on. The total amount of cheese regardless of where you bought it I mean. Automagically you have your stock and also a diary balance of what you eat. All on the same data.
Budgeting up front is the same, you can create nth accounts and "move money" between them, with all balancing options at hand.
No UIs can compete with autocompleted text and views eventually generated from it, entirely user-constructed, with graphs of any kind, statistics and so on.
Finally there is a bottomline: tracking finances, notes, ... are long-term stuff, switching tools in most cases, especially switching modern tools, is a nightmare. Text can be manipulated easily and any workflow in the end might be bend easily, UIs are a different story, switching even if you have some export-then-import ability mean also learn a new workflow adapting yourself to the tool instead of the contrary. So far NO ONE on Earth have succeeded crafting something as flexible as text an UIs built out of it.
Thanks TiredGuy! Automated card is my exact next feature :D. Because I'll be using it to track my subscriptions. I'm actually super close to including it in my mvp, but decided to cut it so I could launch sooner. Thanks for the feedback!
Thanks for your feedback! I've been using Kanban for managing my finances for months, which inspired me to create this product. I'm addressing my own needs and it's working well for me. If others find it helpful too, that's great! And if not, I'm confident that Budget Kanban won't get in their way of managing their budget using their own tools