Insights on building mobile and web applications from the Notchip team.
What it took to build the collections half of Receivix, an invoicing dashboard for marketing agencies: reminder timing across timezones, late-fee math, and scheduled jobs that are safe to run twice.
Read more →A client handed us a twelve-section brief for an invoicing SaaS. Nine questions still needed answers before any code. Here they are, with what got parked and what to put in your own brief.
Read more →A line-item cost teardown of FieldDojo — 57 code-cited calculators, an offline-first SQLite stack, two store submissions — instead of another $15k–$250k range table.
Read more →Five checks — store listings, commit history, the explanation test, arithmetic, and meeting the builders — that expose a faked portfolio in about fifteen minutes. Run every one of them on us.
Read more →How milestone-based pricing actually works — deliverables, acceptance criteria, who absorbs overruns — and the two places the model genuinely costs us.
Read more →A production decision record — why FieldDojo runs on op-sqlite + Drizzle with the database as source of truth, how migrations run unattended on phones we can't touch, and the storage choice that didn't survive.
Read more →How we built expo-panoramic-stitcher — wrapping OpenCV's stitching pipeline in an Expo module with one typed API across iOS and Android — and what changed once real apps started using it.
Read more →How we built GST invoice generation in a React Native app — CGST/SGST/IGST logic, offline PDF export with expo-print, sequential numbering, and paise-level precision.
Read more →How we built FieldDojo — 57 code-cited calculators for electrical, HVAC, plumbing, and construction — with React Native, Expo, and an offline-first SQLite stack.
Read more →What an MVP should cost, a week-by-week build timeline, the scoping method that keeps you inside budget, and the mistakes that kill most startup MVPs before launch.
Read more →React Native vs native iOS/Android vs Flutter — codebase costs, performance reality, hiring, and OTA updates, with evidence from three shipped React Native apps.
Read more →How to add AI to a mobile or web app: choosing between API models, on-device inference, and fine-tuning — plus the architecture and UX patterns that make it work.
Read more →Milestone pricing vs time-and-materials, senior engineers vs junior handoffs, real code ownership vs lock-in — how Notchip compares to a typical software agency.
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