Help keep 78983 free for everyone
Your support pays for new tools, hosting, contest prizes, promotion and the people who build it all. Choose a level below.
Supporter
$5 per month
- Name on the supporters wall (optional)
- Monthly 78983 Brief
- Our sincere thanks
Most popular
Builder
$25 per month
- Everything in Supporter
- Vote on the next calculator
- Early access to new tools
Patron
$100 per month
- Everything in Builder
- Funds a contest prize each quarter
- Logo or link on Supporters page
One-time gift
Any amount
- Choose your own amount
- Optionally fund a specific goal
- Receipt on request
Where your support goes
We publish what support funds. Current funding toward this quarter's goals:
New calculators & features62%
Hosting, security & tools80%
Contest prizes35%
Hiring writers & creators20%
Promotion & marketing15%
Contributions are voluntary support for an independent website and are not tax-deductible charitable donations. Support never buys editorial influence over calculators or content.
Pledge your support
Submit your pledge and we'll reply with a secure payment link (card, PayPal or bank transfer). No payment details are collected on this site.
Sponsor a calculator
Put your brand on a high-intent tool with a respectful "Sponsored by" line and link.
Sponsorship options →Fund a prize
Back a monthly contest and reach an engaged community of learners and builders.
See contests →