Some of the top features that developers must include in their chat app development are,

• Real-time messaging, 
• Group chats, 
• File and multimedia sharing,
• Push notifications, 
• User profiles, 
• Read receipts, 
• High-end privacy,
• 100% customizations, and 
• Multi-platform compatibility. 

Great list! Real-time messaging and privacy are total must-haves, but I’d also add voice/video calls to the mix. If you’re wondering how to create apps like WhatsApp, nailing a seamless user experience across platforms is key. What feature do you think makes a chat app truly stand out?