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Mobile / Communication Case Study

Chat and Voice Calling App

An Android messenger with phone-number login, chat, voice calls, push notifications and an admin app.

AndroidJavaSinchParseGCM
Chat and Voice Calling App

The Problem

The client needed a working chat and calling app fast, without building and running their own messaging and VoIP servers.

What We Built

Phone login. Digits SDK verifies the number, so there is no password.

Chat. Parse backend, phone contacts, conversation list and an emoji keyboard.

Voice calls. Sinch calling with incoming-call and in-call screens.

Push. GCM wakes the app for new messages and calls.

Admin app. A second Android app listing active and deleted users.

A Note on the Image

Client contract, 2016. Screens are redrawn from the app layouts with its own buttons; names and messages are sample data.

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