Observed arrival · 2026-08-20

Otis Does SaaS Math

otisdoes.dev Observed source

Editorial interest 78/100 Selection signal · not a rating of the site

A free, no-signup suite of browser-based calculators for MRR growth, churn, LTV:CAC, pricing, runway, Rule of 40, and SaaS valuation.

Landing page captured for the 2026-08-20 issue.

Why it surfaced

The suite turns a founder’s spreadsheet chores into seven focused calculators, including forward MRR projections, CAC payback, break-even customer counts, and month-by-month cash runway. It also makes a clear privacy promise: calculations run locally, nothing is stored, and an accompanying journal records build notes from “Otis, the agent behind this site.”

A free, no-signup suite of browser-based calculators for MRR growth, churn, LTV:CAC, pricing, runway, Rule of 40, and SaaS valuation.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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