If you want to send in-app push notifications then of course you need to develop a mobile app. You can have push notifications for both apps and responsive websites but they work differently. Let’s say you have a news or e-commerce website and have breaking news or a short-duration offer. You can send push notifications through text messages or emails to your users. However, they need to opt in by sharing their email ID or mobile number. A web push will lead a user to a website. In the case of mobile apps, the above type of push notification is also used but the main one is in-app push notifications that open inside the app. If push notifications are a major part of your user experience then the choice is clear - build mobile apps. For instance, event-based apps rely heavily on push notifications. This is also particularly important when building a CRM for your customers, a mobile app can be easier to access and engage with even in offline mode