Case Study
HepsiHesapla
149+ Turkish-language calculators across 18 categories — the domestic-market counterpart to HealthCalcPro.
Tech stack
- Frontend
- Next.js, Tailwind CSS — neo-brutalist design system
- Hosting
- Vercel
- Content
- 149+ calculators across 18 categories
- Language
- Turkish (primary market: Turkey)
- Monetization
- AdSense (current) → SaaS pivot (in progress)
The brief
HepsiHesapla is the Turkish-language equivalent of HealthCalcPro, but broader in scope. The 18 categories span lifestyle calculators (similar to HealthCalcPro), financial calculators, mathematical utilities, unit conversions, and domain-specific tools for the Turkish market (e.g., VAT calculations, social security formulas, Turkish legal limits).
The target audience is the Turkish-language internet user who wants free, fast utilities without the friction of language switching. Turkey has 85 million people and a highly active mobile-first internet user base — but quality Turkish-language utility tools are underserved relative to English.
The approach
Applied via the same methodology used across all 16 portfolio sites. Read full methodology →
The neo-brutalist design system was a deliberate aesthetic choice: bold borders, high contrast, visible structure. In a market saturated with generic white-card UIs, the visual distinctiveness improved brand recall in user testing. The design also communicates "this is a tool, not a content site" — it sets expectations immediately.
The 149+ calculator count was reached through systematic category mapping: for each of the 18 categories, a minimum of 8 calculators were defined before building began. This prevented the common failure mode of launching with 10 calculators and stalling.
The build
All calculators are built with the same privacy-first architecture as HealthCalcPro: browser-side calculation, no server transmission of user inputs. This was a deliberate policy decision applied across the entire portfolio.
The 18-category structure created natural internal linking: a user who calculates their BMI is presented with related calculators in the Lifestyle category, then cross-linked to the Financial category for calorie-to-fitness-cost calculations. This reduced bounce rate and increased pages-per-session.
The AdSense monetization was functional but limiting — CPM rates in the Turkish market are significantly lower than in English-language markets. The SaaS pivot is toward a B2B tool: offering calculator widgets to Turkish HR departments and financial institutions who need embeddable, branded calculation tools.
Category coverage was prioritized by search volume in the Turkish-language Google index, using Ahrefs data for .com.tr and .com/tr search patterns.
Screenshots
Results
- ⏳TODO: organic traffic metrics pending analytics confirmation.
- ✓149+ calculators live across 18 categories.
- ✓Neo-brutalist design system deployed and functional.
- ✓SaaS widget pivot in planning — TODO: launch date TBD.
What I'd do differently
The neo-brutalist design generated more comments and shares than any previous design — but also more complaints about "it looks broken." The lesson: distinctive design is worth the trade-off when your product is a utility, because familiarity with a tool reduces anxiety about the aesthetic.
AdSense in non-English markets requires volume that is difficult to achieve with a niche calculator site. The SaaS B2B pivot was inevitable — it should have been planned from the beginning rather than added as an afterthought.
HealthCalcPro is a lifestyle tool platform, not a medical authority. See our full medical disclaimer.
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