Why “Deku”
木偶 is a wooden puppet: a figure carved to look like a person, which can do nothing on its own. As slang it means good-for-nothing. It is the word Bakugo throws at Izuku in My Hero Academia, and it is meant to land as an insult — right up until Izuku keeps it and makes it mean something else.
Finance apps go the other way. They arrive promising to change your relationship with money, and mostly show you a chart of what you already knew, behind a subscription. So this one takes the low expectations up front and tries to earn its way up from there: one small thing done properly, and honesty about everything it does not do yet.
What it does today
Make a group. Add each expense as it happens and say how it splits:
- evenly
- by exact amounts
- by percentage
- by shares
Whatever you pick resolves to amounts that add up to the total, to the cent, so nobody has to re-run the arithmetic later. From there the app derives who owes whom — per currency, never summed across them — and settling up is recorded like any other fact.
No paywall. Splitwise puts a five-second “upgrade to unlock” interstitial in front of adding an expense and caps how many you can add in a day. Here every split mode and every chart is free, and adding an expense is one tap from anywhere.
Where it’s going
Shared expenses are the beginning, not the point. The intent is a personal financial suite that grows one honest feature at a time, and what that turns into depends on what proves useful — so there is no roadmap on this page to hold up later.
There is no build to install yet. The domain, the database schema, the balance derivation and the HTTP API are written and tested; the app itself is still being built, in the open.