Building a Fast, Privacy-First Financial Calculator Suite with Astro: Lessons from Fintrava
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Financial decisions often carry high stakes. Whether choosing between interest-only and repayment mortgages, evaluating retirement borrowing, or testing buy-to-let stress margins, people need clarity before making multi-thousand-pound commitments. However, many existing online financial tools present two major drawbacks: Performance bloat: Slow loading times driven by heavy tracking scripts and unnecessary server-side round trips. Data collection risks: Many calculators force users to provi