Thoughtfully designed software that stays out of your way.

We currently build one focused iOS app: Periodic Expenses.

Periodic Code builds focused tools with clear value, calm UX, and data-conscious design principles.

Explore Periodic Expenses Get support

Minimal data collection

Data-conscious design

Export-friendly by default

Periodic Expenses — a privacy-first iOS travel expense logger built for real-world workflows.

What we build

Small, deliberate software with strong defaults and fewer surprises.

Local storage, intentional collection, and clear explanations—so users stay in control.

Clean layouts, sensible defaults, and details that reduce friction in daily use.

Your data should be portable. Built-in export keeps reporting simple.

Periodic Expenses helps you track trip expenses, mileage, receipts, and multi-currency totals— without requiring an account.

View product