DuoShot.
DuoShot is a chassis-free App Store pipeline: outer 5.4″, inner 7.6″, optional 6.9″. Preview without an account, ZIP export once signed in. Browser uploads to Supabase Storage, Sharp rendering on Node, Stripe checkout.
Role
Product design, Next.js full-stack architecture, Supabase auth, Sharp image pipeline and Stripe billing.
Approach
A Next.js SaaS that produces accurate iPhone Duo App Store screenshots in minutes, without a physical device.
View onlineProblem
App Store captures for iPhone Duo (outer and inner displays) do not match a classic iPhone. Without a device, wrong chassis and ratios fail review.
Solution
A web pipeline that clips and composes the three Duo formats, with instant preview, HD ZIP behind an account, and Free / Launch / Indie / Studio plans.
Results
- A public production tool at https://duoshot.vercel.app.
- Preview without an account, ZIP with an account, Google / email / magic-link auth.
- Vitest + Cypress quality gate, Vercel deploys.