The platform you choose for your app can have a significant impact on your development and maintenance costs. You have to consider factors such as the target audience, the device compatibility, the functionality, and the security of your app. You can opt for native, hybrid, or web-based apps, depending on your needs and budget. Native apps offer the best performance and user experience, but they are also the most expensive and time-consuming to develop and update. Hybrid apps use a single code base for multiple platforms, which reduces the development and maintenance costs, but they may compromise on some features and quality. Web-based apps are the cheapest and easiest to create and update, but they require an internet connection and may not offer the same level of functionality and user engagement as native or hybrid apps.