Support Oye Hoye
Every calculator here is free, no login required, no ads. Running and building it still costs time and money. If it's been useful to you, a donation helps keep it going.
Nothing unlocks extra features — every calculator stays free either way. This page exists purely so people who want to support the project can.
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Prefer to help another way? Sharing Oye Hoye with someone who'd find it useful helps just as much.