Support
Support DerivaDojo
DerivaDojo is free. No account required, no ads, and no problem locked behind a paywall — and that is not going to change.
Where your support actually goes
- Keeping the site running. Honestly, that costs almost nothing today — hosting and the database both sit on free tiers. Support covers the domain renewal and the headroom for when traffic outgrows those tiers.
- My education. I build DerivaDojo alongside studying. Support buys time to keep expanding the problem bank instead of taking on other work.
Give once — no subscription:
Payment is handled entirely by PayPal — no card details ever touch DerivaDojo. Contributions are personal support, not a tax-deductible charitable donation.
Other ways to help
Money is not the only useful thing. Telling us which problems you want is genuinely valuable — it decides what gets built next. Sharing DerivaDojo with someone who is stuck on a topic helps just as much.