$2"Idea Validation OS", Lets you Validate any Idea ( Service or Product Based ) in a Matter of Minutes..

A Notion freelance OS for clients, projects, leads, invoices and income, with a client portal and launch checklist.
Freelance OS is made and sold by heycalvins on Gumroad. We don't sell it; this is our independent write-up, and we may earn a commission if you buy through our link.
Freelance OS by Calvin (heycalvins) is a Notion workspace for running a solo service business: projects, clients, leads, invoices and money in one system, with step-by-step tutorials built in.
Designers, developers, writers and consultants who are juggling clients across docs, spreadsheets and email, from first clients to scaling up.
It does not send invoices or take payments. It tracks them, and you still bill through your usual tool. The listing notes that the graph and automation features need a paid Notion plan, and Notion AI is a separate add-on.
$39 is at the upper end of freelancer templates in our pool (median $25, most $12–45), and in line with other full "OS" systems.
One of the more complete freelancer setups we have seen listed. Worth it if unpaid invoices and scattered clients are a real problem for you. Comparing options? Browse more Notion freelance templates.
Templates sharing this one's tags, reshuffled each visit.
$2"Idea Validation OS", Lets you Validate any Idea ( Service or Product Based ) in a Matter of Minutes..
$39Ultimate solution for effectively managing your team's productivity and success.
$9Mnage your contacts, sales pipeline, projects and more in Notion.
$5Template to handle your development tasks, multiple clients with payments and meetings in one place
Makers keep the majority of every sale. Listing takes about fifteen minutes and we review it within two days.