One codebase for Android and iPhone, when that is the right call

Who this is for

Most Indian business apps should start on Android alone, and we say so on nearly every other page. This one is for the exceptions: businesses whose users really are split between Android phones and iPhones. A diagnostic lab chain in Chennai is a typical case. Its patients, who book home sample collection and download reports, are largely on Android. The referring doctors, who check their patients' reports between consultations, include many iPhone users, and they are the relationship the lab can least afford to frustrate. Families living abroad who book tests for their parents in India add more iPhone users. Building the app twice, once in Kotlin and once in Swift, would roughly double the work. A cross-platform framework avoids that.

Flutter and React Native in plain terms

Cross-platform frameworks let one team write the app once and produce both the Android and iPhone versions. Flutter, from Google, draws every pixel itself, which gives a consistent look on both platforms and smooth animation. React Native, from Meta, uses each platform's own interface elements and is written in JavaScript or TypeScript, the languages behind most modern websites, so web developers can help maintain it. We choose between them on your app's needs and on who will look after it in three years, and we put the reasoning in writing. Our detailed comparison of Flutter, React Native and native Android goes deeper.

What you give up against native

• Device-level work takes extra effort. Bluetooth scales, background location and long offline sessions need platform-specific code on each side, which eats into the savings. Apps built around those features are usually better native.
• Size and startup. Cross-platform apps tend to download larger and open slightly slower, which shows most on entry-level Android phones.
• Waiting on the framework. When Google or Apple release new phone features, native apps can use them at once; cross-platform apps sometimes wait for the framework to catch up.
• Two stores, two rulebooks. One codebase still means two reviews, two listings and two developer accounts to keep in good standing.

How it fits Indian users

The Android build still has to respect Indian conditions: small downloads, testing on budget phones and graceful handling of patchy networks. UPI payments go through your payment gateway on both platforms, and the hand-off to the customer's UPI app is tested separately on each, because it behaves differently on iPhones. Reports and invoices share to WhatsApp from either phone. For the lab, a downloaded report stays cached on the phone, so a patient can show it to a doctor in a hospital corridor with no signal. Our article on digital tools for clinics and hospitals covers the patient-side questions.

Process, accounts and price

The six steps are the same as for our native work, with testing doubled across entry-level Android phones and iPhones. The iPhone version is compiled on a Mac and published through an Apple developer membership in your company's name, which carries a yearly fee; Google's Play Console has a one-time fee. Cross-platform apps fall in the same broad bands as Android apps: focused apps from ₹1,00,000 to ₹2,50,000 in 6 to 8 weeks, full apps from ₹2,50,000 to ₹6,00,000 in 10 to 16. The second platform adds testing and store work, so a cross-platform project sits higher in its band than an Android-only app of the same scope.

When to stay native, or skip the app

If nearly all your users are on Android, as with most staff apps and many retail apps in India, a native build usually costs the same or less and runs better on budget phones; see native Android app development. If customers only need to look something up and pay occasionally, a responsive website reaches both kinds of phone without any app store. The CertTulen Academy learning platform we built is a web platform of that kind, serving learners in India, Malaysia and Singapore through the browser. Choose cross-platform when you need both stores and the app is mostly screens and data rather than hardware. Ask VS Tech Builders and you will get that recommendation in writing before you pay anything.