bill
splitter.
a mobile app for the who-owes-who problem: snap one receipt for an itemised split, or bundle a whole trip's worth of bills and settle everyone up across all of them. built with react native and expo, backed by supabase, with grok doing the actual reading.
not on the app store. still lives in an expo dev build on my phone, which felt honest enough to say outright.
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before
the app.
the same problem, solved first with @bayarakuwoi_bot. it's locked to just me now, but the code's still worth a look.
snap a photo of the receipt. a vision model (grok) reads every line item, the price, the quantity, and the tax, then hands you an editable draft instead of a blank form.
even, custom percentages, or item by item, so the person who didn't order the wagyu doesn't pay for the wagyu.
one screen shows exactly who owes who, minimised across every bill in a trip. tap a debt as paid and it's done.
bills and trips sync to a real backend behind real accounts, so the data survives longer than the group chat does.