Contact person: Business Client

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Location: Kolkata, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I need a clean, reliable VoIP application whose core job is simple: high-quality voice calls on both Android and iOS. The app should register quickly, connect calls with minimal latency, and keep audio clear even on variable networks.

I will supply the SIP account details and branding assets; you handle everything else—from choosing the most stable VoIP libraries (PJSIP, WebRTC, or equivalent) to publishing-ready builds for Google Play and the App Store.

Deliverables must include:
• Source code and build instructions for each platform
• Release-ready APK and IPA (or TestFlight build)
• Brief documentation covering third-party libraries, push notification setup, and any server configuration required

If you have proven techniques for battery-friendly background calling or can suggest lightweight extras like voicemail or call recording, let me know; I’m open to enhancements that don’t bloat the core voice experience." (client-provided description)