Mobile VOIP App

A production-ready VOIP mobile application built with React Native and WebRTC. One codebase, two platforms. Runs natively on both iOS and Android with full calling features your team needs: recording, transfer, whisper, SIP configuration, and contact management.

We designed the UI and built the entire app in-house at BinarCode. This is not a concept. It is a working product you can white-label and ship.

React Native for iOS and Android

Built with React Native, so you get native performance on both platforms without maintaining two separate codebases. The UI adapts to each platform while keeping a consistent look and feel.

• Single codebase deployed to App Store and Google Play
• Native performance with optimized rendering and smooth 60fps animations
• Platform-aware UI that feels right on both iOS and Android
• Over-the-air updates so you can push fixes without going through app review

Smart Dialer

The keypad your users already know how to use:

• Auto-formatted numbers displayed as (555) 123-4567 while typing
• Full numeric keypad with letter labels (ABC, DEF, etc.)
• Recent calls at the top for quick redial
• One-tap calling from recent history or contacts

Call Screen with Enterprise Features

This is where it gets serious. During an active call, your agents get:

• Call recording with a pulsing red indicator so everyone knows it is on
• Transfer to route calls to another agent or department
• Whisper mode so a supervisor can coach the agent without the customer hearing
• Hold to pause the conversation
• Mute for privacy
• DTMF keypad for navigating phone menus and entering codes
• Add call to set up conference calls

These are the features call centers and sales teams actually need.

Contacts

A clean, searchable contact list:

• Instant search by name or number
• Alphabetical sections with sticky headers
• Color-coded avatars based on initials
• Tap to call on any contact row

Call History

Full call log with smart filtering:

• All / Missed filter to quickly find what you need
• Grouped by date into Today, Yesterday, This Week, This Month
• Call type indicators showing incoming, outgoing, or missed
• Duration display for completed calls

Professional Settings

Real VOIP configuration options, not placeholder settings:

• SIP Account with server address, WSS transport, and SRTP encryption toggle
• Audio devices with microphone selector and live input level meter
• Output and ringtone device selection
• Echo and Noise Cancellation toggles for WebRTC audio processing
• Call Forwarding, Voicemail, Auto-Record, Do Not Disturb
• Number format selection (International, National, E.164)
• Profile showing extension number and registration status

How This Demo Works

Everything you see is fully interactive:

• 15 pre-loaded contacts with realistic names and numbers
• Call history spanning several weeks with mixed call types
• Simulated call flow that goes from dialing to ringing to connected
• All toggles work including record, mute, hold, and transfer
• Whisper notification appears during active calls to show supervisor coaching

No backend required. Try every feature right in your browser.

Tech Stack

• React Native for cross-platform iOS and Android
• WebRTC for real-time voice communication
• TypeScript for type safety across the entire codebase
• Zustand for lightweight, predictable state management
• Framer Motion for physics-based animations

What We Can Build For You

This app shows what our team delivers. We can build:

• White-label VOIP apps with your brand, deployed to both app stores
• Call center mobile clients with recording, transfer, whisper, and queue management
• WebRTC integrations into your existing product or CRM
• Custom communication platforms from SIP backend to mobile frontend

We handle everything: UI/UX design, React Native development, WebRTC integration, backend APIs, and deployment to App Store and Google Play.

Designed and developed by BinarCode. 30 engineers, based in Romania. We build mobile apps with React Native and real-time features with WebRTC. Both design and development happen in-house.

Ready to build your own VOIP app? Get a project estimate from our team.