The main difference between native and cross-platform app development is that native app development is specific to one platform, while cross-platform app development is not.
Native app development is usually more expensive and time-consuming than cross-platform app development, because it requires more specific coding and knowledge of the platform. However, native app development usually results in a higher-quality product, because the app is specifically designed for that platform.
Cross-platform app development is less expensive and time-consuming, because the same code can be used for multiple platforms. However, cross-platform app development usually results in a lower-quality product, because the app is not specifically designed for any one platform.