Android application .
Ios application.
React native .
xamarin.
ionic.
flutter
Native script
Mobile Angular UI
shopify
Swift
Kotlin
java
python
Mobile app development is the act or process by which a mobile app is developed for mobile devices, such as personal digital assistants, enterprise digital assistants or mobile phones. ... As part of the development process, mobile user interface (UI) design is also essential in the creation of mobile apps.
web- php, laravel,angular, html , css , bootstrap,
mongo, Django, joomla ,ROR.