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Build a Real-Time Flutter Chat App for Free (2026 Tutorial)
EngineeringSep 9, 2026

Build a Real-Time Flutter Chat App for Free (2026 Tutorial)

Home > Blog > Build a Flutter Chat App for Free Flutter makes it possible to build one product experience for iOS and Android, but a reliable chat feature still needs more than a message list and a WebSocket connection. Mobile networks change, apps move between foreground and background, users sign in on multiple devices, and missed messages must be synchronized after reconnecting. To support production-oriented integrations from day one, this tutorial uses the Nexconn Production-Re

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
Build Real-Time Chat Across Web, iOS, Android, and Flutter with Nexconn
EngineeringSep 3, 2026

Build Real-Time Chat Across Web, iOS, Android, and Flutter with Nexconn

Home > Blog > Build Real-Time Chat Across Platforms Deploy production-grade in-app chat across Web, iOS, Android, and Flutter at $0 with our Free Multi-Platform Chat SDK (10K MAU). Adding a message input and a WebSocket is easy. Building chat that survives network changes, app restarts, offline periods, multiple devices, media uploads, unread state, group growth, and production traffic is a different problem. This guide shows the shortest practical path to real-time in-app chat wit

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
Scaling Unlimited Live Chat: Architecture, Consistent Hashing, and Notification-Pull
EngineeringAug 18, 2026

Scaling Unlimited Live Chat: Architecture, Consistent Hashing, and Notification-Pull

Home > Blog > Scaling Unlimited Live Chat Live streaming has a concurrency problem that most infrastructure wasn't designed to solve. When a major broadcast goes live — a national event, a product launch, a celebrity stream — viewer counts can spike from thousands to millions within minutes. Every one of those viewers expects to see the chat moving in real time. They want to send messages, receive reactions, and feel like they're part of something happening right now. Any lag, any d

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
The Push Delivery Rate Trap: How Global Device Fragmentation Kills User Retention
EngineeringJul 27, 2026

The Push Delivery Rate Trap: How Global Device Fragmentation Kills User Retention

Home > Blog > Push Notification Delivery Guide Looking to maximize message retention without building custom push infrastructure? Explore our Production-Ready Free Chat SDK (10K MAU) — turnkey multi-channel push and full Pro features at zero cost. While industry benchmarks for push opt-in rates hover around 60%, the actual delivery rate in complex, multi-manufacturer markets like Southeast Asia often tells a very different story—frequently dropping below 60% when FCM is deprioritize

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
Implementing Chat End-to-End Encryption (E2EE): A Technical Guide to X3DH and Double Ratchet
EngineeringJun 25, 2026

Implementing Chat End-to-End Encryption (E2EE): A Technical Guide to X3DH and Double Ratchet

Home > Blog > Implementing Chat E2EE Claims of "security" are everywhere, but very few chat APIs actually walk the walk. Most offerings fall apart under a true zero-trust audit because they rely on basic encryption wrappers. Genuinely secure messaging demands much more than simple data-in-transit protection; it requires the cryptographic heavy lifting of X3DH and the Double Ratchet algorithm. To navigate the current maze of data residency laws or shield users from server-side breaches,

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
WebSocket vs MQTT: Why Both Fail Modern Chat API Reliability (2026)
EngineeringApr 16, 2026

WebSocket vs MQTT: Why Both Fail Modern Chat API Reliability (2026)

Home > Blog > WebSocket vs MQTT Architect's Note: Skip the protocol plumbing. Deploy battle-tested, high-reliability messaging with our Free Real-Time Chat API (10K MAU) — full Pro capabilities, automatic reconnection, and multi-channel push at $0. The world of chat is changing faster than ever. For a long time, we all lived in a "Mobile-First" world. If you were building an app, you just wanted a solid Chat SDK so people could send messages on their phones. But today, a great In-app

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
Solving Latency: Best In-app Chat SDK for Emerging Markets (2026)
EngineeringApr 9, 2026

Solving Latency: Best In-app Chat SDK for Emerging Markets (2026)

Home > Blog > Best In-app Chat SDK Whether you are scaling social interactions, AI agents, global gaming ecosystems, or on-demand delivery networks, the cross-border challenge in 2026 has shifted. It’s no longer just about localized content—it’s about the invisible communication infrastructure that keeps every interaction seamless. Let’s be honest: finding a reliable In-app Chat API is easy until you actually try to scale. In the real-world networks of the Middle East and Southeast As

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
What is a Chat API? And how to guarantee message delivery on any network?
EngineeringApr 7, 2026

What is a Chat API? And how to guarantee message delivery on any network?

Home > Blog > How to guarantee message delivery Looking to launch reliable in-app messaging at $0? Explore Nexconn's Free Chat API & Messaging SDK with full Pro features up to 10,000 MAU. A Chat API is the backend engine that powers real-time messaging inside your app. It handles everything from sending a "hi" to delivering rich media, managing group conversations, and syncing messages across devices. But here's the catch: a Chat API is only as good as its ability to deliver every me

Ryan Yang
Ryan YangNexconn Infrastructure Engineer. Optimizes latency and scales microservices for hundreds of millions of concurrent users. Shares technical deep dives and backend lessons for zero-latency communication.
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