From Idea to Launch: The 8-Week App Build Checklist

Why 8 Weeks Works

Four weeks is tight for everything except a focused single-feature MVP. Twelve weeks invites scope creep. Eight weeks is the Goldilocks window: enough time to build something meaningful, tight enough to prevent the project from drifting.

This checklist assumes a dedicated team of 2–4 people (product lead, designer, 1–2 engineers). Adjust timelines for team size.

Weeks 1–2: Scope and Architecture

Week 1: Discovery and Brief

[ ] Write the one-paragraph problem statement
[ ] Define the primary user persona
[ ] Identify the single core user action (the one thing this product must do)
[ ] List what is explicitly out of scope
[ ] Define success criteria (measurable, not vibes)
[ ] Agree on tech stack (don't revisit this)
[ ] Set up project management (Linear, Notion, or GitHub Issues)

Week 2: Architecture and Design Foundation

[ ] Set up repositories with README and contribution guidelines
[ ] Configure CI/CD pipeline (deploy on merge to main)
[ ] Bootstrap authentication (Clerk, Supabase Auth, or Auth.js)
[ ] Set up database with initial schema
[ ] Configure environments: local, staging, production
[ ] Create Figma workspace with token library (colors, typography, spacing)
[ ] Design core screens: landing + sign up + core feature (3–5 screens)

Weeks 3–4: Core Feature Build

Week 3: Backend Core

[ ] Build the data model for your core feature
[ ] Implement core API endpoints (CRUD + business logic)
[ ] Set up error handling and logging (Sentry or similar)
[ ] Write integration tests for core endpoints
[ ] Implement email transactional flows (welcome, reset password)

Week 4: Frontend Core

[ ] Build component library (button, input, card, modal minimum)
[ ] Implement authenticated layout and routing
[ ] Build core feature UI connecting to backend
[ ] Mobile-responsive implementation (test on real devices)
[ ] Empty states, loading states, error states for core flow

Weeks 5–6: Secondary Features and Polish

Week 5: Secondary Features

[ ] User settings / profile page
[ ] Notification system (in-app or email)
[ ] Admin panel basics (user list, basic metrics), if required
[ ] Any third-party integrations from the scope (Stripe, Twilio, etc.)

Week 6: Polish and Accessibility

[ ] Audit core flow for accessibility (keyboard nav, screen reader, colour contrast)
[ ] Performance audit (Lighthouse > 85 on mobile)
[ ] Implement analytics (PostHog, Mixpanel, or GA4)
[ ] Write onboarding flow (tooltip tour or empty-state guided actions)
[ ] Review all copy: every button, every error message, every tooltip

Week 7: QA and Pre-Launch

[ ] Full manual QA pass on core user flows (test on Chrome, Safari, Firefox, and mobile)
[ ] Security review: check for exposed API keys, open endpoints, injection vulnerabilities
[ ] Load test core endpoints with expected traffic
[ ] Set up uptime monitoring (Better Uptime, Checkly)
[ ] Configure backups for database
[ ] Prepare support email and response template
[ ] Write privacy policy and terms of service
[ ] Set up domain, SSL, and DNS

Week 8: Launch

[ ] Soft launch to waitlist (first 50–100 users)
[ ] Monitor error logs and uptime for 48 hours
[ ] Collect activation data (did users complete the core action?)
[ ] Run first user interviews (5 users minimum)
[ ] Fix P0 issues immediately, queue P1/P2 for sprint 2
[ ] Public launch announcement (Product Hunt, Hacker News, newsletter)
[ ] Retrospective: what worked, what didn't, what sprint 2 covers

FAQ

Q: What if a feature isn't done by the end of its week?

Move on. A delayed feature gets cut from the sprint, not carried over without a timeline adjustment. "Almost done" features that drag into the next week compress the entire schedule.

Q: Do I need all of these steps for a very simple MVP?

No. For a single-screen MVP, cut weeks 5–6 significantly. The non-negotiables: authentication, error handling, logging, analytics, and a real QA pass.

Q: Should I do a public launch or a soft launch first?

Always soft launch first. 50–100 users from your waitlist before a public Product Hunt launch. Catch critical bugs before the world sees them.

Q: What does a realistic 8-week team look like?

Product lead (½ time), 1 designer (full time weeks 1–5, part time weeks 6–8), 1–2 engineers (full time throughout). Total cost with a senior studio runs $25,000 to $55,000 depending on complexity.