Our work

    Apps we built, and still run

    These are our own products, live on the public internet with real users. Same team, same stack and same standards we apply to client work — so you can click through and judge the output before you brief us.

    Showing 1 of 4 projects in web apps — page 2 of 2.

    Stamp Duty Calculator — screenshot of the live app at stampduty.sgFinance calculator

    Stamp Duty Calculator

    BSD, ABSD and SSD in one calculation, on rate tables we can update in minutes

    A property stamp duty calculator covering Buyer's Stamp Duty, Additional Buyer's Stamp Duty and Seller's Stamp Duty, including residency status and property count. Rate tables are kept in one versioned source so an IRAS revision is a single controlled change, not a hunt through the codebase.

    • BSD, ABSD and SSD in one calculation with a full breakdown
    • Residency and property-count aware
    • Versioned rate tables for auditable updates after IRAS changes
    ReactTypeScriptVersioned rules engineSSR for SEO

    Services behind this build

    Web DevelopmentApp DevelopmentWeb Design
    Read the case studyVisit stampduty.sg

    Want something like this for your business?

    Tell us the workflow you want to fix. We will tell you honestly whether it is a website, a custom app, or a process change you do not need to pay us for.

    Message us on WhatsApp +65 8123 5409

    Building an app? See the S$3,500 Launch Partner offer.