Case Study #09

Hepsihesapla

149+ Turkish calculators across 18 categories — the largest free calculator hub in Turkish SERPs, built with a neo-brutalist design that no competitor dared copy.

Next.jsTailwindVercelTypeScript

The Brief

The Turkish web in 2024 is underserved for calculator tools. Existing sites are slow, ad-heavy, and built on WordPress themes from 2014. Hepsihesapla was designed to be the calculator hub that Turkish users actually want to use — comprehensive, fast, and visually distinct.

The audience spans students doing math homework, professionals calculating loan repayments, and tradespeople working out material quantities. The breadth of 18 categories (finance, health, construction, math, cooking, and more) means one URL can become the default bookmark for everyday calculations.

The Approach

Programmatic SEO at scale — each of the 149 calculators is a unique URL with its own meta title, meta description, structured data (HowTo + FAQPage), and canonical. No two calculator pages are identical even where the underlying calculation is similar.

The methodology applied here is documented at /methodology in the context of text analysis, but the structured data principles translate directly: every page answers a specific question, names the answer explicitly, and provides a HowTo schema so AI overviews can cite the step-by-step logic.

Tech Stack

  • Frontend: Next.js 15, TypeScript, Tailwind CSS
  • Design system: JetBrains Mono font, black/white/cream neo-brutalist palette
  • Hosting: Vercel
  • Analytics: Vercel Analytics + Google Search Console
  • Monetization: Google AdSense (initial) → SaaS embeddable widgets (planned)
  • Schema: HowTo + FAQPage + BreadcrumbList per calculator page

The Build

The neo-brutalist design system was the first decision — and the most contrarian one. JetBrains Mono as the primary typeface, a black/white/cream palette, zero border-radius, and deliberately heavy borders. In a Turkish SERPs landscape dominated by generic Bootstrap sites with soft gradients and stock photography, the design stands out immediately. Users remember it.

149+ calculators were organized across 18 categories before a single line of code was written. The taxonomy was designed to match how Turkish users actually search — not “financial calculators” but “kredi hesaplama” (loan calculation) and “kira hesaplama” (rent calculation). Each calculator targets a specific long-tail query, with the category pages serving as hub pages for internal linking.

AdSense monetization was the initial revenue model — display ads alongside the calculator output area. The long-term plan is more interesting: a SaaS pivot where Turkish SMEs can embed a branded calculator on their own site (a mortgage broker embedding a loan calculator, a dietitian embedding a calorie calculator). The embedded widget links back with a do-follow attribution link, providing a compounding backlink acquisition mechanism.

Wikidata entity and Knowledge Graph presence were built into the launch rather than added later. This is the standard practice across all 16 sites — entities first, content second.

Results

Note: TODO: Add real Search Console / Ahrefs metrics here

Pages indexed

[TODO]

Domain Rating

[TODO]

Top keyword

[TODO]

What I'd Do Differently

The neo-brutalist design is bold and memorable, but it reduces AdSense click-through rate. Ad units designed for soft, rounded, pastel-heavy sites look awkward in a high-contrast black-and-white layout. A cleaner, more neutral layout around the ad placement areas would have improved early revenue without compromising the distinctive identity.

The SaaS pivot plan should have been documented as a product roadmap from day one, not a vague future intention. Investors and potential acquirers respond to documented plans, not verbal descriptions.

Screenshots

HepsiHesapla homepage screenshot
HepsiHesapla calculator tool screenshotHepsiHesapla tool results screenshot

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