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Semih Turna

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Service 02 · Custom software

Web and desktop tools built for your business

For work that off-the-shelf software does not quite fit, I build tools that do one job and do it completely. Delivered as source code, so what you paid for stays yours.

Describe your tool See example apps

Example apps

Two apps I built that are in use.

Overview screen of the Household Budget app: monthly card and cash targets, overdue and upcoming bills, and the expense entry form.
Overview screen, with demo data.

Web app · works on phones

Household Budget: a shared budget and bill tracker

A web app where partners keep the same budget together from different phones. In real daily use.

  • Shows upcoming and overdue bills separately
  • Monthly card and cash targets, with how far under target you are
  • Joining the same budget from another phone with an invite code, synced live
  • Keeps entries on the device and retries when the connection drops
Today screen of the K Pusula app, in Turkish: progress towards a 100-net target and the day's tasks with time and question targets.
Today screen, with sample data. The app is in Turkish.

Desktop app

K Pusula: a study coach for Türkiye's KPSS exam

A desktop app for students preparing for the KPSS civil service exam; it suggests the day's study based on where they lose the most points.

  • Shows the first task of the day with a time and question target
  • Timed focus sessions with a sound alert when time is up
  • Tracks progress towards a 100-net target in milestones
  • Weighs full practice exams as a stronger signal than regular question practice

What I can build

Three kinds of tools.

Web tools

Single-purpose tools that live on your own site: calculators, selectors, configurators. Open in a second, easy to explain to a customer.

Apps that work offline

One file, no server, no installation. Works on a laptop with no internet on site, and on a phone in the field.

Python data collection tools

Shopify and WooCommerce stores, supplier catalogues.

  • The fields you choose, nothing extra
  • Clean Excel or CSV output
  • The Python script, yours to re-run
  • Short setup notes included

No CAPTCHA or bot-protected sites, and no login-walled or private data. You see sample output before ordering.

Have a tool in mind?

Tell me the problem in a few sentences; I will tell you honestly whether it is worth building.

Tell me about your project