SamTinkerBox is an AI review lab run by a CPO who still writes code.

I lead product at a 100+ PM/EM/designer organization in Tokyo, ship my own automation pipelines (daily briefings, meeting-to-action, people analytics), and publish the parts I’m confident ship in real workflows — not hype.

Every tool review on this site starts from a production use case I actually had. Price, output quality, API reliability, and workflow fit all come from hands-on testing, not from marketing pages.

What you’ll find here

• AI tool comparisons — Runway vs Kling, ElevenLabs vs Murf, HeyGen vs Synthesia, and more. Same prompt, different platforms, side-by-side outputs.
• Automation playbooks — how to wire AI tools into real PM/CPO workflows. Discovery, planning, reviews, and execution.
• Build logs — games, apps, and side-income experiments I ship under the SamTinkerBox brand.

Elsewhere

• Store — sam-tinker-box.lemonsqueezy.com — playbooks and templates I’ve used myself.
• Games support — /games-support/ — support pages for SamTinkerBox games.
• X — @samtinkerbox — shorter notes and what I’m testing this week.

Affiliate disclosure

Some posts contain affiliate links. If you buy through them I may earn a commission at no extra cost to you. I only link to tools I’ve personally tested and would use myself.