Engineering Notes

2026 · 08 · 03

App Maintenance Costs: What's Included and Why You Can't Skip It

Many business owners are shocked to discover app maintenance costs after launch. App Store updates, system compatibility, security...

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2026 · 07 · 30

Custom System vs. SaaS: A 3-Year Cost Breakdown for SMEs

SaaS subscriptions look affordable per month, but three years can cost over HK$700k. Custom systems require upfront investment but...

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2026 · 07 · 13

Building an Event Booking App: Features, Cost Control

An event or booking app doesn't need a blank-page build. We break down the five core feature modules, how a Flutter codebase cover...

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