Case study · GrantFit

GrantFit: a full subscription app, first version in 4 days

A writing tool for nonprofits that fits approved grant wording to each funder's word or character limit.

Visit grantfit.appBuild yours with us
First commit to first version
4 days
Code changes
53
App screens
5

Counted on 28 October 2026

How it was built

A full subscription app, first version in 4 days

Built with

  • Next.js
  • Supabase
  • Paddle
  • Claude
  • Resend
  • PostHog
  • Sentry
  • Playwright

  1. Day 1 · 11 Oct 2026

    • AgentsFit engine: counts words the way funder portals do, trims and rewrites with Claude.
    • AgentsClients, approved text and deadlines stored securely, one account per organization.
    • AgentsLanding page, a subscription plan with a free trial, and checkout tested end to end.
    • PeopleDesign direction chosen; agents applied it to every screen.

  2. Day 3 · 13 Oct 2026

    • AgentsThe full app: Fit workspace, Library, Clients and a Deadlines board.
    • PeopleLogo concept approved; agents made the app icons.
    • AgentsHelp pages, pricing, FAQ, terms, accounts, branded emails and billing.
    • AgentsLaunch hardening: AI spend cap, SEO and a share card.

  3. Day 4 · 14 Oct 2026

    • AgentsWelcome after checkout and privacy-friendly analytics. First version done.
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