Free tools

Free tools for product teams

Genuinely useful generators and calculators — no signup, no email wall. Built by the team behind AIOProductOS, the product OS that connects feedback, revenue, work, and code on one spine.

Start with MRR & ARR See the product

Product

PRD generator

Turn a problem into a clean product requirements document — problem, goal, users, metrics, requirements — then copy or download the Markdown. No signup.
Open tool →
Product

User story generator

Turn a role, a want, and a benefit into a formatted 'As a… I want… so that…' story with Given/When/Then acceptance criteria.
Open tool →
Product

Product one-pager generator

Turn an idea into a crisp one-page brief — problem, solution, audience, benefits, metrics, and the ask — a stakeholder can read in two minutes.
Open tool →
Product

Release notes generator

Turn a version and your changes into clean, user-facing release notes grouped into New, Improved, and Fixed.
Open tool →
SaaS metrics

MRR & ARR calculator

Get your monthly and annual recurring revenue, and project it 12 months out at your growth rate — with a live chart.
Open tool →
SaaS metrics

Churn rate calculator

Turn customers and churned counts into churn rate, retention, average lifetime, and LTV — with a retention curve.
Open tool →
Product

RICE prioritization calculator

Score any feature by Reach × Impact × Confidence ÷ Effort and rank your backlog by value per unit of effort.
Open tool →
SaaS metrics

Rule of 40 calculator

Add growth and margin to see if you clear the 40% health benchmark, with a live pass/fail gauge.
Open tool →
Cost

SaaS stack cost calculator

Total what your product tool stack costs per year and compare it to one flat plan — representative list prices.
Open tool →
Product

WSJF calculator

Score backlog items by Cost of Delay ÷ Job Size to rank by what delivers value soonest per unit of effort.
Open tool →
SaaS metrics

CAC payback calculator

See how many months of gross margin it takes to recover customer acquisition cost.
Open tool →

Each tool runs the math in your browser — nothing is sent anywhere. They're free because the same thinking powers AIOProductOS: the metrics matter more when feedback, revenue, work, and code share one record.

FAQ

About these free tools

Are these tools really free?

Yes — every tool here is genuinely free to use with no time limit and no usage cap. There's no upsell to unlock a result and nothing is gated behind a paywall. They exist because the same thinking powers AIOProductOS, and useful tools are a better introduction than a brochure.

Do I need to sign up or give an email?

No. There's no signup, no account, and no email wall — you open a tool and use it immediately. That applies to the generators (PRD, user story, one-pager, release notes) and every calculator alike. AIOProductOS itself has no free tier, but these standalone tools are simply free.

Does my data leave the browser, and can I use the output commercially?

Every tool runs entirely in your browser — the math and text generation happen on your device and nothing you type is sent to a server or stored. The output is yours to use however you like, including commercially in real PRDs, board decks, or investor updates. Copy or download it and go.

What tools are available?

Four document generators — PRD, user story, product one-pager, and release notes — plus SaaS and product calculators: MRR & ARR, churn rate, RICE and WSJF prioritization, Rule of 40, CAC payback, and a SaaS stack cost calculator. Each is a focused, standalone tool you can open directly from the list above.