https://ayduke.com/guides Plain-language guides to tax, mortgages, nutrition, units and web standards — the background behind our calculators. en-GB https://ayduke.com/guides/technical-seo-checklisthttps://ayduke.com/guides/technical-seo-checklistSun, 15 Mar 2026 00:00:00 +0000A hands-on checklist for technical SEO: meta tags, robots.txt, XML sitemaps, hreflang, canonical URLs, structured data and page-speed fundamentals. https://ayduke.com/guides/compound-interest-basicshttps://ayduke.com/guides/compound-interest-basicsSun, 01 Mar 2026 00:00:00 +0000Understand compound interest, compounding frequency, the Rule of 72 and how to harness exponential growth for savings or avoid it on debt. https://ayduke.com/guides/bmi-and-body-compositionhttps://ayduke.com/guides/bmi-and-body-compositionTue, 10 Feb 2026 00:00:00 +0000Go beyond BMI: understand body fat percentage, lean mass, waist-to-height ratio and why context matters more than a single number. https://ayduke.com/guides/vat-across-europehttps://ayduke.com/guides/vat-across-europeSun, 01 Feb 2026 00:00:00 +0000Compare VAT rates across all EU member states and the UK. Understand reduced rates, exemptions, the OSS scheme and how to handle cross-border invoicing. https://ayduke.com/guides/mortgage-costs-ukhttps://ayduke.com/guides/mortgage-costs-ukThu, 15 Jan 2026 00:00:00 +0000Understand every cost involved in buying a home in the UK: mortgage interest, stamp duty, fees, insurance and the long-term impact of rate choices. https://ayduke.com/guides/uk-income-tax-explainedhttps://ayduke.com/guides/uk-income-tax-explainedMon, 12 Jan 2026 00:00:00 +0000A plain-language guide to UK income tax for the 2025/26 tax year: personal allowance, tax bands, National Insurance, student loans and pension relief.