Cafiyn Pulse
For Lovable, Bolt, v0, Replit builders

You shipped in a weekend. Now make it survive real users.

You prompted your way to an app that works. That is a real accomplishment and a real product. It is also, right now, missing the ten boring things that decide whether your first real user has a great day or a terrible one. Rate limits, secrets not in the repo, backups tested, payment webhooks signed, monitoring paging a human, HTTPS with HSTS, access control tested with a second account. Three focused tools, plain-English scenarios, no consulting required.

Grade your vibe-coded stack
Sound familiar

Things every vibe coder eventually notices.

These are the specific problems Lovable, Bolt, v0, and Replit users flag most often once real users start showing up. Every one has a specific fix.

The app works, but I have no idea if it is secure.
→ Free Stack Grader gives you an honest A-F grade in 3 minutes and a prioritized fix plan.
My AI bill jumped from $12 to $340 last month.
→ Cost Comparator ranks 79 models by projected cost on your usage. Prompt caching + routing typically cut bills 40 to 60 percent.
I do not know what to do before I put a paid ad behind this.
→ Launch Checklist filters to your stack (Lovable / Bolt / v0 / Replit) and shows exactly what to check.
My env vars are in the AI builder's UI. Is that safe?
→ Depends on the platform. The Stack Grader Secrets category has the specific answer for each of the four builders.
I do not have a real error monitor. I just... check the app sometimes.
→ Sentry free tier + a 20-minute setup is fine for now. The Launch Checklist has the concrete steps.
The payments look right in test mode. I have not tried live keys.
→ That gap is where free products happen. Checklist has webhook-signature and real-purchase steps for every provider.
The tools

Your three free tools.

🔐 Stack Grader
Grade your stack in 3 min
Honest A-F letter grade across 10 production categories with a prioritized fix plan.
Open →
💰 Cost Comparator
Model your real AI bill
79 models across text, voice, image, video. Live math on your usage. Recommendation engine.
Open →
🚀 Launch Checklist
Stack-tailored launch plan
Filtered list for your specific stack, with why / what / how per item.
Open →

All three save to your account and pick up from any device.

Platform notes

Specific to each vibe coding platform.

Every platform has a couple of gotchas that only apply to it. The Launch Checklist filters to them when you pick your stack.

  • Lovable. Point-in-time backup on Supabase. Rotate the service_role key before making the project public. Move to a custom domain before you share externally.
  • Bolt.new. StackBlitz preview is not your production. Export to GitHub, deploy to Vercel or Netlify, set up DNS.
  • v0 (Vercel). Preview env vars set separately from production. Deploy hook + instant rollback both tested. Turn on Vercel Speed Insights.
  • Replit Agent. Custom domain via Replit Deployments. Confirm secrets are not exposed in the public repl viewer.
Also for

Other builders using the same tools.

Also for
Solo founders
You are the whole company. Free tools that stand in for the roles you cannot hire yet.
Also for
Stealth builders
Building in private, invite-only, or under NDA. No public feedback loop.
Also for
Side projects (nights + weekends)
Full-time job, part-time build. Ship on the hours you have, not the hours you wish you had.
Also for
Indie hackers (bootstrapped)
Revenue first, no VC safety net. Every dollar of infra + AI cost is your dollar.
Go deeper

Built for exactly your situation.

Launch checklists for your stack
LovableBolt.newReplit Agentv0 (Vercel)
What your AI features will cost
Chatbot costsImage generation costs
FAQ

Common questions.

What is a "vibe coder"?

Anyone who shipped a working app by prompting an AI builder (Lovable, Bolt.new, v0, Replit Agent) or by pair-coding with Claude, Cursor, Windsurf, or Copilot, without writing every line themselves. The code is real; the delivery vehicle was conversation, not typing.

Does Lovable / Bolt / v0 make my app production-ready by default?

No. They generate working code and give you a URL. Production means also: rate limits, backups tested, HTTPS + HSTS, payment webhook signatures, real error monitoring paging a human, GDPR cookie banner if you serve EU, secrets not in the repo, access control tested with a second account. None of that is default. Cafiyn Pulse tells you what is missing and how to add it, in plain English, for your specific platform.

Will the Stack Grader work if I do not read my own code?

Yes. It is a scenario-based self-assessment, not a code scanner. You pick the tier that best matches your setup (None / Basic / Standard / Pro), it gives you an A-F grade and a fix plan with named tools and step-by-step how-to. If you generated the app, you can still answer the questions.

The AI provider bill for my Lovable / Bolt build is climbing, how do I stop it?

Open the free Cost Comparator, put your real numbers in (users per day, calls per user, tokens per call). It ranks 79 models by projected monthly cost and suggests a routing plan (cheap model for triage, premium for hard cases, premium reasoning for deep research). Common wins: prompt caching (30 to 50 percent off), routing (another 20 to 40 percent), per-user daily caps (kills runaway users).

My Lovable / Bolt / v0 project is on their default subdomain. Should I move it?

Yes, before you launch publicly. A custom domain is trust plus SEO plus the difference between a shareable link and one that dies when your free plan expires. The Launch Checklist has stack-specific steps for pointing DNS from Lovable, Bolt, v0, and Replit at your domain, with verification via dnschecker.org.

How do I add real payments to a vibe-coded app?

Stripe, Razorpay, Paddle, or LemonSqueezy. The Launch Checklist has the specific items: swap test keys for live keys in your host env, verify webhook signatures with the provider SDK, run one real end-to-end purchase for the smallest possible amount, refund yourself, confirm the money moved in your provider dashboard. Skipping the webhook signature step is how people get free products.

What if I want to migrate off Lovable / Bolt / v0 later?

All four let you export the code to GitHub. Once exported, treat it as a Next.js (or your framework) app on Vercel / Render / Fly / Railway. The Launch Checklist has a "Custom / Other" mode for exactly this case.

Is it really free? Where is the paid tier?

Yes, free forever. There is no paid tier of Cafiyn Pulse. Cafiyn Innovations makes money on other products; Pulse exists as a public free tool for founders and builders.

Open the tool.

You built it in a weekend. Grade it in 3 minutes. All three tools save to your account so you can come back and re-check after each fix.

Grade your vibe-coded stack