How to
![image: Building with SDKs versus Components](https://www.pubnub.com/cdn/3prze68gbwl1/3ItMwZBz343bXksukTotLO/e7c354fa3bcb9cb0864fdb097c628eae/sdkVComp.png?w=360&h=200&fit=)
Chat
Building Chat: Building with SDKs versus Components
Follow this how-to to understand the differences around building chat application with Chat Components or SDKs
![Message Timestamps image](https://www.pubnub.com/cdn/3prze68gbwl1/4ne9oJW19m4obpW6TGBUEw/72769303515f46914379b1a4b3f491de/messagetimestamps.png?w=360&h=200&fit=)
Chat
Building Chat: Dealing with timestamps
Follow this how-to to understand how to deal with and format timestamps for PubNub Chat applications.
![How-To: Building Collaborative Apps](https://www.pubnub.com/cdn/3prze68gbwl1/7k7dqDZYn6jT8Pudcvjs7g/ea3b2c6bd3250944a0089fb91b12a0ef/Screen_Shot_2022-08-30_at_11.33.57_AM.png?w=360&h=200&fit=)
Collaboration
Build Collaborative Applications
Follow this how-to and learn how you can build and power your real-time collaborative applications with PubNub.
![How to telemedicine](https://www.pubnub.com/cdn/3prze68gbwl1/3kxt4nL0qg20RP3bicABzF/a7408bf07928e8b163f9a93555165c1f/How-to-Telemedicine-Image.jpg?w=360&h=200&fit=)
Chat
How to Build a Telemedicine App
Read our complete guide on making your own telemedicine app. In this guide, you’ll learn about telemedicine, HIPPA, PHI, and solutions for building.
![PubNub Portal How-To: Push Notifications for Android](https://www.pubnub.com/cdn/3prze68gbwl1/5TBAGKZp8xbaXNykvXpPoy/dab6198453019d1ccc2f6d34d382277a/Screen_Shot_2022-07-26_at_1.51.09_PM.png?w=360&h=200&fit=)
Push Notifications
Enabling Mobile Push Notifications: Android
Follow this how-to to enable PubNub's Mobile Push Gateway in the Admin Portal to send your Android users push notifications and alerts.
![how-to virtual events 1200](https://www.pubnub.com/cdn/3prze68gbwl1/IFOhssyArOlw6gExyhfZD/db531510b8cb52a44e884a8542db7446/how-to_virtual_events_1200.png?w=360&h=200&fit=)
Virtual Events
How to Build Chat for Virtual Events
Virtual events need chat to keep users engaged, but it's often a challenge to build a chat solution that works at scale and can handle the network load surges that occur during popular events. As a developer, you need to select a robust backend API provider capable of transmitting and receiving the high volume of messages that your viewers and participants generate.
![Telehealth Tutorial cross-platform Multiple devices showing a telemedicine chat application with conversations between doctors and patients.](https://www.pubnub.com/cdn/3prze68gbwl1/YImhMz8bJU4tjn1gXtryj/65e6df2e74858ef07bb70088dde5f026/18-new2.png?w=360&h=200&fit=)
Chat
How to Build Cross-Platform Chat Applications with PubNub
If your team is developing a cross-platform application you have a number of options to choose from but whichever approach you take, from web-only to cross-platform frameworks, PubNub can easily incorporate chat into your app.
![How-to Build Vue Chat Apps](https://www.pubnub.com/cdn/3prze68gbwl1/3unV0nzOBgNrauUqfluAd7/9b623bcba4978b74233e305899d71c9a/How-to-Build-a-Chat-App_1200x630_-1.png?w=360&h=200&fit=)
Chat
How to build a chat app using HTML, CSS, Vue, & JS
Read our complete guide to build a chat app using HTML, CSS, Vue, and JS. Read this and our other information building interactive chat apps.
![PubNub How-To's: Push Notifications 1200x630](https://www.pubnub.com/cdn/3prze68gbwl1/1zqaCINwvSnFLDqq2uPlNx/f122a8441c2321d971b88cd81fb36e2e/Screen_Shot_2022-06-06_at_4.00.06_PM.png?w=360&h=200&fit=)
Push Notifications
Push Notifications
Follow this how-to to learn more about how you can leverage push notifications in your application to better keep your users engaged and informed.