Basis
12 screens · Investing and tradingA brokerage that shows what a sale would actually cost
Twelve screens of an investing app built on the number most brokerages bury, the cost basis of each individual lot, so that every unrealised gain, every realised gain, every tax band and every harvesting opportunity on every screen is derived from the lots themselves rather than asserted as a single blended figure.
The design system and all 12 screens in one prompt. Each screen is also on its own page, free, if you only want one.
Design system
One file, shipped with the set. Every screen declares these values inline so it can be lifted out on its own, and the build refuses a screen that paints a colour this file does not name.
Colours
Scales
The flow
In the order somebody meets them. This is the app's own sequence, not a list of categories.
The portfolio
4What is owned and what it has done. Four screens that answer the value question, then immediately answer the harder one, which is against what.
Placing a trade
4From a watchlist to a filled order, with the thing most apps hide shown up front: which lot is being sold and what that choice costs.
What the taxman sees
4The half of investing that decides the actual return. Individual lots, realised gains by band, a harvesting view, and the report it all adds up to.
