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App is short for Application.
An app is a type of software or program that is made to perform specific tasks for the user. Apps run on smartphones, computers, tablets, smart TVs, and other devices.
Mobile Apps
Run on smartphones (Android, iPhone)
Example: Facebook, WhatsApp, YouTube, bKash
Web Apps
Run in a web browser, no need to install
Example: Gmail.com, Google Docs, Canva
Desktop Apps
Installed on a computer/laptop
Example: Microsoft Word, Photoshop, VLC Player
Hybrid Apps
Work both on mobile and as web apps
Example: Instagram (mobile + browser), Uber
Apps help users perform a variety of tasks:
Chatting → WhatsApp, Messenger
Shopping → Daraz, Amazon
Watching videos → YouTube, Netflix
Sending money → bKash, Nagad
Learning → Duolingo, Google Classroom
Managing business → POS apps, accounting apps
Booking rides → Uber, Pathao
Apps are built for different platforms:
Android → Uses Google Play Store
iOS (iPhone/iPad) → Uses Apple App Store
Windows/macOS → Uses Microsoft Store / Mac App Store
Apps are made using programming languages like:
Java/Kotlin → for Android apps
Swift → for iOS apps
Flutter, React Native → to make cross-platform apps (Android + iOS together)
HTML/CSS/JS + frameworks → for web apps
| Purpose | App Name |
|---|---|
| Messaging | WhatsApp, Messenger |
| Social Media | Facebook, Instagram |
| Video | YouTube, TikTok |
| Payments | bKash, PayPal |
| Shopping | Daraz, Amazon |
| Transport | Uber, Pathao |
| Education | Google Classroom, Byju’s |
An app is a digital tool you install or use on a phone or computer that helps you do something — like chat, learn, shop, pay, or entertain.
