The app looks interesting! I'm nt sure if I'd stick to entering in every purchase, but I'd be willing to try. Worst case you could add Plaid integration as an option too. I do think there is value in simplifying way more than Mint.

One idea I had recently was for a similar interaction, but instead of for expenses it would be for every time you "saved" money. So for example, if you were in the super market and saw some $5 cookies and debated buying them. If you decided not to, since you wanted to save that money instead, you'd open then app and quickly enter $5. It would keep a tally of all of the savings you had instead of the expenses, to incentivize that mentality.

You might be able to easily incorporate that already (or I could after signing up) by adding a "Savings" category. But if there are any places where expenses are graphed or totaled it would need to be discounted.

Anyways, congrats and good luck with the launch! I like how clean it feels.