SIP planner
See what a monthly investment grows into — or how much you need each month to reach a goal.
How it works
- 1Every month the amount is added, then the whole pot grows by the monthly return.
- 2A yearly step-up raises the monthly amount once a year, like a salary rise.
- 3It also shows the final amount in today’s money, at 6% inflation — the number that tells you what it will actually buy.
More demos
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A SQL database written from scratch — parser, B+ tree indexes, a query planner, joins and transactions — running live on 22,000 rows in your browser.
Raft consensus, live
The algorithm that keeps etcd and Kubernetes consistent. Five servers elect a leader and replicate a log — crash them and split the network while it runs.
Live collaborative editor
Real-time editing with no server. Three devices share a note — take one offline, edit everywhere, reconnect, and they merge. Open a second tab and it syncs live.