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FIELD NOTES & PLAYBOOKS

Mobile Apps guides.

React Native vs Flutter, native vs cross-platform, PWAs, app security, UPI payments and getting approved on the App Store and Google Play.

Mobile Engineering · 8 min read

UPI Payment Integration for Apps and Websites: How It Works and What to Test

UPI intent, collect and QR flows, payment gateways, autopay, refunds and the edge cases to test before launch.

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Mobile & Web · 7 min read

PWA vs Native App: Which Should You Build for Your Business?

Installation, offline use, notifications, device features, store presence and cost: when a PWA is enough and when you need a native app.

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Mobile Engineering · 8 min read

App Store Optimisation (ASO): How to Get Your App Found on Google Play and the App Store

App name, keywords, screenshots, ratings and localisation: how ASO works on Google Play and the App Store, and what to do first.

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Mobile Engineering · 8 min read

React Native vs Flutter: Which Should You Choose for Your App in 2026?

React Native and Flutter compared on language, performance, interface, hiring and web code sharing, with clear rules for when to pick each.

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Mobile Engineering · 7 min read

Native vs Cross-Platform App Development: How to Choose for Your Product

When to build native with Swift and Kotlin and when cross-platform with React Native or Flutter makes more sense, explained for founders.

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Mobile Engineering · 8 min read

How to Get Your App Approved on the App Store and Google Play: Common Rejections and Fixes

The common reasons apps are rejected by the App Store and Google Play, a pre-submission checklist and what to do if your app is rejected.

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Mobile Engineering · 8 min read

Mobile App Security Checklist: 15 Checks Every App Should Pass Before Launch

Fifteen security checks for mobile apps before launch, covering storage, login, APIs, permissions, payments and testing, based on OWASP guidance.

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Mobile & Web · 8 min read

India's Digital Personal Data Protection Act: A Plain-English Guide for App and SaaS Founders

What India's DPDP Act means for app and SaaS products in plain English: consent, notices, user rights, security and the features to build in.

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Mobile & Web · 9 min read

Mobile App vs Web App: Which Should You Build First? A Decision Guide for Founders

Compare mobile and web apps on reach, speed, cost drivers and features, then use plain decision rules to choose the right first version.

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Mobile Engineering · 10 min read

From PRD to App Store: The 10-Week React Native & Flutter Engineering Playbook

A production blueprint for consumer and B2B mobile apps: offline-first synchronization, real-time WebSockets, background geolocation, and Apple review approval tactics.

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