Why Your Currency Converter Breaks Right When You Need It Most

You need to split a bill in a foreign currency. You open a free currency converter. It errors out, or worse — shows you yesterday's rate. I've been there. That's why I built a currency tool that prioritizes reliability over everything else. The rate limit problem nobody talks about Most free currency APIs share a fatal flaw: they have rate limits that don't tell you when you've hit them. You get a stale or null response and never know why. The common culprits: exchangerate-api.com — free tier is 1,500 requests/month, no burst allowed openexchangerates.org — free tier is 1,000 requests/month, deprecated endpoint frankfurter.app — genuinely free and open, but no historical data on free tier and updates only once per day exchangerate.host — the one I use for the everydaytoolshub converter, supports both live and historical, but rate limits apply The pattern: the moment your tool gets any meaningful traffic, the free API tier starts returning errors or stale data. Your users get wrong rate