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Signs Your MVP Is Ready to Launch (and Signs It Is Not)

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Signs Your MVP Is Ready to Launch (and Signs It Is Not)

The hardest decision in building an MVP is not what to build. It is when to stop building and ship. We have launched over a dozen products at Threshline, and the tension is always the same: ship too early and you embarrass yourself with bugs; ship too late and you waste months on features nobody asked for.

Over five years, we have developed a checklist we run through before every launch. It is not about perfection. It is about identifying the minimum bar where real users can get real value — and everything below that bar is a launch blocker, not a wish-list item.

The Core Flow Works End to End

This is the single most important criterion. Can a user sign up, complete the primary action your product exists for, and get the expected result?

For MindHyv, the core flow was: entrepreneur creates an account, sets up their profile, and a customer can book and pay for their service. Every screen in that flow had to work. The analytics dashboard, the social features, the advanced invoicing — none of that was required for launch.

For JustTheRip, it was: user buys a digital pack, opens it, and sees their cards. The collection management, trading features, and leaderboards came later.

Define your core flow in one sentence. If a user cannot complete that sentence, you are not ready. If they can, everything else is negotiable.

Test the core flow yourself. Not in a development environment — in the production environment, with a real account, real data, and real payments (use Stripe test mode, then do at least one real transaction with a real card). We have caught embarrassing bugs in this step more times than we care to admit.

Error Handling Covers the Basics

Your app will break. The question is whether it breaks gracefully or leaves users staring at a white screen.

You do not need comprehensive error handling for an MVP. You need three things:

1. Network failures show a useful message. If the API is down or the user loses connectivity, they should see “Something went wrong, please try again” — not a raw stack trace or an infinite spinner.

// Basic error boundary pattern in SvelteKit
// src/routes/+error.svelte
<script lang="ts">
  import { page } from '$app/stores';
</script>

<div class="flex min-h-screen items-center justify-center">
  <div class="text-center">
    <h1 class="text-4xl font-bold text-gray-900">
      {$page.status}
    </h1>
    <p class="mt-4 text-gray-600">
      {$page.error?.message ?? 'Something went wrong.'}
    </p>
    <a href="/" class="mt-6 inline-block text-blue-600 hover:underline">
      Go back home
    </a>
  </div>
</div>

2. Form submissions validate input before hitting the server. If a user enters an invalid email, tell them immediately. Do not wait for a server round-trip to return a 400 error.

3. Payment failures are handled explicitly. If you accept payments, declined cards, expired sessions, and webhook failures must all resolve to a clear state. The user should never wonder “did I get charged?” This is non-negotiable. We use Stripe’s built-in error handling and always confirm payment status server-side before granting access.

// Always verify payment status server-side
const session = await stripe.checkout.sessions.retrieve(sessionId);

if (session.payment_status === 'paid') {
  await grantAccess(session.metadata.userId, session.metadata.planId);
} else {
  // Don't grant access — redirect to retry
  throw redirect(303, '/checkout?error=payment_incomplete');
}

Team celebrating a successful product launch together

Authentication and Authorization Are Solid

Authentication (who are you?) and authorization (what can you do?) are launch blockers. A user seeing another user’s data is not a bug — it is a trust-destroying incident that can kill your product before it starts.

For most MVPs, Supabase Auth handles authentication well. Email/password, magic links, or OAuth with Google — pick one or two and implement them properly. Do not build a custom auth system for an MVP.

Authorization is where we see more mistakes. If your app has any concept of “my data” versus “your data,” you need Row-Level Security policies or server-side access checks.

-- Supabase RLS policy: users can only see their own projects
CREATE POLICY "Users see own projects" ON projects
  FOR SELECT
  USING (auth.uid() = user_id);

-- Team members can see team projects
CREATE POLICY "Team members see team projects" ON projects
  FOR SELECT
  USING (
    auth.uid() IN (
      SELECT user_id FROM team_members
      WHERE team_id = projects.team_id
    )
  );

Test this by logging in as User A and trying to access User B’s resources through the UI and by directly calling the API. If you can see data that is not yours, stop and fix it before launch.

Monitoring Tells You When Things Break

You do not need a full observability stack for an MVP. You need to know when your app is down and when users hit errors.

Our minimum monitoring setup:

  • Error tracking: Sentry, with source maps uploaded during build. When a user hits a JavaScript error or a server function throws, you see it within minutes. The free tier is enough for an MVP.
  • Uptime monitoring: BetterStack (formerly Better Uptime) or a simple cron job that pings your health endpoint. You want a Slack notification or text message if your app goes down.
  • Basic logging: Supabase logs database queries and edge function executions out of the box. For SvelteKit server routes, log errors to the console — they show up in Vercel’s function logs.
// Minimal error logging in a SvelteKit hook
// src/hooks.server.ts
import * as Sentry from '@sentry/sveltekit';

Sentry.init({
  dsn: SENTRY_DSN,
  tracesSampleRate: 0.1, // 10% of transactions for performance
});

export const handleError = Sentry.handleErrorWithSentry(({ error, event }) => {
  console.error('Unhandled error:', error);
  return {
    message: 'An unexpected error occurred.',
  };
});

If you launch without monitoring, you will only learn about problems when users complain — and most users do not complain, they just leave.

Basic Analytics Are In Place

You need to answer two questions after launch: “Are people using this?” and “Where do they drop off?”

For an MVP, this does not require a complex analytics setup. We typically use:

  • Plausible or Fathom for privacy-friendly page-level analytics. You want to see daily visitors, top pages, and referral sources.
  • A few custom events for key actions. Track when a user completes signup, finishes the core flow, and (if applicable) makes a payment. That is enough data to know if your product is working.
// Track key events with Plausible
function trackEvent(name: string, props?: Record<string, string>) {
  if (typeof window !== 'undefined' && window.plausible) {
    window.plausible(name, { props });
  }
}

// Usage
trackEvent('Signup Completed', { method: 'google' });
trackEvent('Booking Created', { plan: 'pro' });
trackEvent('Payment Completed', { amount: '29.00' });

Do not set up mixpanel funnels, cohort analysis, or A/B testing frameworks before launch. You need signal, not sophistication. If 100 people sign up and 3 complete the core flow, you have a problem that does not require analytics tooling to diagnose — it requires talking to users.

Runner crossing the finish line representing reaching a launch milestone

There Is a Way for Users to Give Feedback

This is the one item on our checklist that founders most often skip, and it is one of the most valuable.

Build a feedback mechanism into your MVP. It can be as simple as a mailto link, a Typeform embed, or a small widget. We built Trackelio specifically because we saw how much product teams struggle to collect, organize, and act on user feedback.

At minimum, include:

  • An email address or contact form users can reach you at
  • An in-app way to report bugs (“Something wrong? Let us know”)
  • A post-signup or post-action prompt asking for feedback

The first 50 users of your MVP are the most valuable people in your product’s life. Make it trivially easy for them to tell you what is broken, confusing, or missing.

Signs You Are Over-Engineering

If you recognize any of these patterns, you are building too much before launch:

You are building an admin dashboard before you have users. Manage early data through Supabase’s dashboard or direct SQL queries. Build admin tools when manual processes become painful — not before.

You are optimizing for scale. If your MVP needs to handle 100,000 concurrent users, you do not have an MVP — you have a scaling problem that does not exist yet. Supabase and Vercel handle traffic spikes well out of the box. Optimize when you have traffic.

You are building user roles and permissions for roles that do not exist yet. “We might need an auditor role later” is not a reason to build a full RBAC system now. Start with two roles: user and admin. Add more when someone actually needs them.

You are writing comprehensive tests. We are not anti-testing. But for an MVP, manual testing of the core flow is sufficient. Write automated tests for payment flows and auth — the parts where bugs cost trust or money. Integration test the rest later.

You are building a mobile app and a web app simultaneously. Pick one. For most products, start with web. A responsive SvelteKit app works on phones, tablets, and desktops. Build a native app when you have proven demand and specific native features to justify it. We covered our recommended tech stack in a separate post — Flutter is our choice when mobile is the right call, but it rarely is for an MVP.

Signs You Are Under-Building

Equally dangerous is launching too thin:

The core flow requires workarounds. If users need to email you to complete an action that should be self-service, the flow is not done.

There is no error handling at all. A white screen on error is not an MVP tradeoff — it is a broken product. The error page takes 20 minutes to build.

You skip auth because “it’s just a prototype.” If users create accounts and store data, auth is not optional. Leaked user data in a prototype is still leaked user data.

There is no way to pay. If your business model requires payment, integrate Stripe before launch. “We’ll add payments later” usually means “we’ll never validate whether people will actually pay.”

No https, no custom domain. Launching on a vercel.app subdomain with default SSL is fine. Launching on an IP address over HTTP is not. Users notice, and so does Google.

Green traffic light signaling it is time to go and launch

Our Pre-Launch Checklist

Here is the actual checklist we run through. It takes about two hours for the final pass:

## Launch Readiness Checklist

### Core Product
- [ ] Core user flow works end to end in production
- [ ] Real payment processed successfully (not just test mode)
- [ ] Email notifications send and arrive
- [ ] All pages load in under 3 seconds on mobile

### Security
- [ ] Auth works (signup, login, logout, password reset)
- [ ] Users cannot access other users' data
- [ ] API endpoints require authentication where needed
- [ ] Environment variables are not exposed to the client

### Error Handling
- [ ] Custom error page exists (not default framework error)
- [ ] Form validation shows clear messages
- [ ] Payment failures redirect to a retry state
- [ ] Network errors show a fallback message

### Monitoring and Analytics
- [ ] Error tracking is active (Sentry or equivalent)
- [ ] Uptime monitoring pings the health endpoint
- [ ] Page analytics are tracking
- [ ] Key events (signup, core action, payment) are tracked

### User Communication
- [ ] Feedback mechanism exists (email, widget, or form)
- [ ] Support email is set up and monitored
- [ ] Transactional emails have been tested

### Infrastructure
- [ ] Custom domain is configured with HTTPS
- [ ] DNS is propagated
- [ ] Database backups are enabled
- [ ] Environment is using production API keys (not test/dev)

Launch Is Not the End

The most important thing to internalize: launching your MVP is the beginning of the learning phase, not the end of the building phase. Everything you built before launch was based on assumptions. Everything you build after launch is based on evidence.

Ship when you hit the bar. Not before, and definitely not after. The perfect is the enemy of the shipped.

If you are building an MVP and want help deciding what to cut and what to keep — or if you need a team to build it — reach out at hello@threshline.com.

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