Plainso

Plainso offers free calculators, estimators, and quizzes that people can use right away or embed on a website. It helps freelancers, founders, agencies, and small businesses answer common questions like pricing, costs, margins, savings, and timelines. The tools run in the browser, so there’s no account, no API keys, and no setup needed. You can copy a simple embed code and add a useful interactive widget to WordPress, Shopify, Webflow, or plain HTML in minutes. It’s a simple way to replace static pages and contact forms with something visitors can actually use.

Key features

• Free calculators and estimators for everyday business questions.

• Embeddable widgets that work with one simple iframe snippet.

• No account, no API keys, and no setup required.

• Tools help visitors estimate pricing, savings, payments, and margins.

• Built for freelancers, agencies, founders, and small businesses.