Building two separate apps is not the only way to reach both Android and iPhone users. When a shared codebase is the sensible choice, and the few cases where going fully native still earns its cost.
When a business decides it needs a mobile app, the first technical question is how to build it. You can write one app for Android and another for iPhone, each in the platform's own language. Or you can use a cross-platform framework such as Flutter or React Native, where a single codebase produces both. The right answer depends on your product, your users and your budget, and it is not always the cheaper option.
Start with your audience. In India, Android is used by the large majority of smartphone owners. For a product aimed at the general public, such as a local delivery service, a booking app or a coaching-class app, Android is where most of your users are. That is often a good reason to launch on Android first and add iPhone later. For a product aimed at a premium or urban audience, or at business users in metros, iPhone matters more and you may want both from day one.
Cross-platform development is the sensible default for most business apps. If your app is mostly forms, lists, dashboards, maps, notifications and payments, a shared codebase lets one team ship to both platforms with a single set of screens and a single set of bugs to fix. That typically means lower cost, faster delivery and, just as important, both versions behaving the same way. We use Flutter for much of this work because it draws its own interface, which keeps the look consistent across devices.
Going native still earns its extra cost in some situations. If the app depends heavily on the phone's hardware, such as advanced camera processing, Bluetooth devices, background location tracking or augmented reality, native code gives you direct and better-documented access. If you need every last bit of performance, such as a graphics-heavy game, native is the better tool. And if you want the interface to follow each platform's conventions exactly, native gets you there with less effort.
Some costs are the same whichever route you choose, and are often forgotten in early quotes. A Google Play developer account has a one-time registration fee. An Apple developer account is an annual fee, and building for iPhone requires a Mac. Both stores review apps before publishing, and an iPhone review can be stricter and slower. Then there is the backend: user accounts, a database, an API, push notifications, and somewhere to host them. The app on the phone is often less than half the total work.
Ask the questions that shape the decision. Which platform do most of your customers use? Does the app need any unusual hardware features? How quickly do you need to launch? Who will maintain it in two years? A framework with a healthy community and plenty of available developers is a lower risk than an unusual one that only your original vendor understands.
There is also a question worth asking before any of this: do you need an app at all? For many businesses a fast, well-built mobile website, possibly installable as a progressive web app, covers the need at a fraction of the cost. An app earns its place when people will use it repeatedly, when it needs notifications, or when it works offline. If customers will use it once a year, a website is likely the better investment.
If you are weighing this up for a real project, bring us the idea and the audience and we will tell you which route we would take and why, including when the answer is that you do not need an app yet.