Free tools

Small, free, single-page tools by independent developer Yunus Emre Vurgun. Everything runs in your browser; nothing is uploaded. Each tool links to a related paid guide in case you want the longer version.

• Local LLM memory and speed estimator: rough VRAM need and tokens-per-second ceiling for running a model on your own hardware.
  Want to go deeper? Paid guide on Gumroad: Hardware Buying & System Design Toolkit or On-Device Chatbot Builder Toolkit.
• Plant photo checklist for AI identification: a printable list of what to photograph so plant ID apps have a fair chance.
  Want to go deeper? Paid guide on Gumroad: Plant Rescue & Care Toolkit.
• OEE calculator: Availability, Performance, Quality and OEE for a machine or line, with the lost minutes split by cause.
  Want to go deeper? Paid guide on Gumroad: Understanding the Shop Floor.
• Scale and key finder: correctly spelled notes, key signature, relative key and diatonic chords for major, minor and modal scales.
  Want to go deeper? Paid guide on Gumroad: Music Theory.
• Estimate accuracy calculator: paste estimated vs actual costs or hours from finished jobs and see your bias, average error and how often you run over.
  Want to go deeper? Paid guide on Gumroad: Bidvariance.com Pro.