Cafiyn Pulse
For the nights and weekends builder

Full-time job, part-time build. Ship on the hours you actually have.

You have a real job. Your side project gets your Tuesday evening, your Saturday morning, and whatever slice of your Sunday your partner does not ask for. That is enough to launch, if the plan is tight and every session moves the launch closer instead of clearing backlog. Cafiyn Pulse is free tools designed for two-hour sessions: audit once (3 min), model your AI bill once (5 min), pick your stack once (5 min), then execute a prioritized list on the hours you have.

Grade your side project in 3 min
Sound familiar

Side-project-specific pains.

I open my laptop on Saturday and lose the first hour figuring out what to do.
→ Stack Grader + Launch Checklist give you a prioritized to-do list the first time you use them. Every session opens with "what is next."
Every AI bill scares me because I am paying with post-tax salary.
→ Cost Comparator projects your bill on your usage. Cost alerts warn you before you cross a threshold.
I keep meaning to add rate limits but I never do.
→ Launch Checklist has a specific "rate limits on auth + expensive endpoints" item with library names for every stack.
I do not know what production-ready means for a side project vs a real startup.
→ Basic and Standard tiers in the Stack Grader are calibrated for exactly this. Skip Pro until you have real revenue.
I want to launch on Sunday but Sunday is my only recovery day.
→ Launch on Monday morning, schedule the Product Hunt post the night before, batch the announcements.
I forget about the app for 3 weeks and it is broken by the time I look.
→ Better Uptime free tier pings your app every minute. Sentry alerts you when something breaks. Both listed in the checklist.
Session template

A two-hour session that actually ships.

Every side-project session has the same shape if it is going to move the launch closer instead of clearing backlog.

  1. Open your Cafiyn Pulse profile. Look at your Stack Grader letter grade and Launch Checklist progress.
  2. Pick the single highest-weight below-Pro Stack Grader category, or the next unchecked Launch Checklist item.
  3. Set a 90-minute timer. Do that one thing. Verify it worked with the how step.
  4. Save your notes + proof URL against the item.
  5. Close the laptop. You moved the launch closer. That is a win.
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.

Also for

Other builders in similar shoes.

Also for
Vibe coders (Lovable, Bolt, v0, Replit)
You shipped with an AI builder. Now it needs to survive real users.
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
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.

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FAQ

Common questions.

How do I launch a side project if I only have 4 to 8 hours a week?

Front-load discovery, back-load execution. Spend one focused Saturday morning running the Stack Grader (3 min), Cost Comparator (5 min), and picking your stack in the Launch Checklist (5 min). You now have a prioritized list of exactly what to do next Tuesday night, and you did not spend the whole Saturday on "figuring out what to do."

Which items on the launch checklist matter most for a side project?

The universal ones (domain + SSL, privacy policy, cookie banner if you serve EU, error monitoring, HTTPS + HSTS). Skip the enterprise-grade items until you have your first ten paying users. The Launch Checklist orders items by group so you can hit the universals first and defer the deeper items.

Can I use these tools without my employer noticing?

Yes. Cafiyn Pulse is a public web app that runs in your browser. No integrations with your work SSO or GitHub org. No pings to your work email. If you use a personal email at signup you can keep the side project fully separated from your employment.

My side project is one file of Python on Railway. Do I still need this?

Yes, because if it collects any user data it needs a privacy policy, HTTPS with HSTS, backups, and rate limits regardless of file count. The Stack Grader Basic tier is written for exactly this shape. Small stacks still fail on the ten boring things.

How do I keep my AI bill inside a $20-per-month side-project budget?

Open the Cost Comparator, drag users per day to 20, calls per user to 5, tokens per call to 800. Pick a cheap primary (Gemini 2.5 Flash Lite, DeepSeek V3, Claude Haiku 4.5) and skip the premium fallback. Turn on cost alerts at $15 so you get an email before you cross $20.

What is the smallest useful launch for a side project?

A custom domain, a landing page describing what it does, a working sign-up (magic link is fine), payments if applicable, and a way to reach you. That is roughly one weekend of Launch Checklist items. Sub-milestone: get your grade card, then get the launch confetti card, then post both publicly with the app URL.

Is Cafiyn Pulse worth using if my side project is not monetized?

Yes. Even a free side project needs HTTPS, a privacy policy if you have signups, and monitoring so you know when it is down. Free tools are still the tools that generate word of mouth. Broken free tools generate no word of mouth.

Open the tool.

Fit it in the coffee break before your standup. Come back Saturday morning with a real list of what to build next.

Grade your side project in 3 min