Free Tools for
Founders & Developers
Quick, honest tools built from years of shipping real products. Estimate what a build should cost, compare how to hire technical leadership, and check whether your app is actually ready for users. No email required, nothing stored.
For founders scoping a build
MVP Cost & Timeline Estimator
Pick your features, platform, and design level to get an instant build cost range, timeline, phase breakdown, and ongoing upkeep estimate.
Open tool →For founders weighing a CTO hire
Fractional CTO vs Full-Time CTO Cost Calculator
Compare the true cost of a full-time CTO (salary, equity, overhead, recruiting) against a fractional retainer, in USD, GBP, or EUR.
Open tool →For vibe-coded apps
AI App Production-Readiness Scorecard
Score how production-ready your Lovable, Bolt, v0, or Replit app is across 36 checks: security, data, AI safety, reliability, and launch.
Open tool →For AI features
AI / LLM API Cost Calculator
Estimate your monthly OpenAI, Claude, or Gemini bill from tokens and request volume, compare models, and see where to cut costs.
Open tool →For EU / UK users
GDPR Readiness Checklist
Score your startup's GDPR readiness across consent, data subject rights, security, vendor DPAs, and transfers, and see what to fix first.
Open tool →For vibe-coded apps
Vibe-Code to Production Migration Cost Estimator
Estimate the cost and timeline to make your Lovable, Bolt, v0, Replit, or Rork app production-ready. Enter your issues and get a realistic budget range.
Open tool →For founders pre-launch
True Cost to Run Your App
Estimate your real monthly infrastructure bill — hosting, database, AI/LLM, email, storage — and see cost per active user at your current scale.
Open tool →For AI features
Which LLM Should I Use? Model Picker
Answer a few questions about your task, budget, privacy needs, and volume, and instantly get a recommended model — GPT-4o, Claude, Gemini, Llama, or Mistral.
Open tool →Frequently asked questions
How accurate is the MVP cost estimator?
The ranges are built from real project data across 80+ startups. They reflect typical agency and freelance rates for each feature category by platform and complexity level. Real quotes will vary — use the tool to set a realistic budget range before talking to developers or agencies.
What is the difference between a fractional CTO and a full-time CTO?
A full-time CTO typically costs $200,000–$400,000 per year in salary plus equity. A fractional CTO gives you senior technical leadership at 1–3 days per week for $5,000–$20,000 per month with no equity dilution. The CTO cost calculator shows the full total-cost-of-ownership comparison so you can see which model makes financial sense at your current stage.
How do I know if my Lovable, Bolt, or v0 app is ready for production?
The AI App Production-Readiness Scorecard checks 36 items across security, authentication, rate limiting, data safety, AI-specific risks, error handling, and reliability. It gives you a score out of 100 and a prioritised list of what to fix before launch. Most vibe-coded apps score between 20 and 50 on the first pass.
How do I estimate my monthly LLM API costs?
Enter your estimated daily request volume, average tokens per request, and select your model (GPT-4o, Claude Sonnet, Gemini Flash, etc.) in the AI Cost Calculator. It outputs a monthly cost estimate and compares models side-by-side so you can see the cost difference before committing to a model.
Are these tools really free?
Yes. All eight tools run entirely in your browser, require no account or email address, and store nothing. Calculations happen client-side. There is no trial period, no paywall, and no upgrade required.
How much does it cost to migrate a vibe-coded app to production?
Typical production-readiness work on a Lovable, Bolt, or v0 app runs $8,000–$30,000 depending on how much backend needs replacing and how many AI features need hardening. The Vibe-Code Migration Cost Estimator gives you a scoped budget range based on your specific issues.
Want the real version, not just an estimate?
These tools give you a starting point. For a real quote, plan, or fix, book a free call and walk me through what you are building.