In Progress


Important: Let us know if you have experience!

We are looking for an emergency PUSH-TO-TALK / WALKIE-TALKIE GROUP APP development within MAX. 5 days.

When you have built / developed a good working PUSH-TO-TALK / WALKIE-TALKIE GROUP APP before, let this know. This can be very important.

We prefer a team working on this as there is very little time!

Must be ready in 5 days, deadline 8th of December.

The Android app needs to be ready in 5 days which must be a "Group Push-To-Talk" / "Group Walkie-Talkie" APP. Where multiple users can speak in the group and they can / must wait until sender has finished talking. When finished speaking one sender can talk back and other users (receivers) in the group can only listen.


- Must be Voice over IP; data related Push-To-Talk / Walkie-Talkie communication.

- Must be working over Wi-Fi and Data connections, including GPRS / EDGE / 3G / HSDPA / LTE.

- Reliable delivery; without voice loss and stuttering, even with difficult and intermittent network coverage.

- Live-recording-sending mode; transfer LIVE Push-To-Talk recordings / communication.

- Record-and-send mode; one "Push-To-Talk button" to semi-synchronous send LIVE Push-To-Talk.

- No-voice-when-receiving mode; when receiving live Push-To-Talk recording other users cannot use the Push-To-Talk button.

- Fast delivery; using low-bandwidth live Push-To-Talk recordings / communication.

- Speaker & Playback; sender and receiver must have as look-and-feel and usability the following options;

1) All send (live) recordings must be stored (as history) in an instant messaging form inside the app, with time and date. With a SENT BY YOU notification.

2) All received (live) recordings must be stored (as history) in the same instant messaging form. With a YOU HAVE RECEIVED notification.

3) All (live) recordings that are stored as history can be replayed to listen again.

4) The designs contains; Push-To-Talk button + Mute button + Speaker button.

- Group can be created by users added as contact (or connected into one group in back-end).

- Developer can choose between Asterisk / FreePBX -or- XMPP / OpenFire as user management.

- Communication must use Over-The-Air must be always 256-AES encrypted.

(All live Push-To-Talk recordings must be 256-AES encrypted)

- Cryptography key exchange per user

(due to little time the key generation can be done as next project)

- Ready and testing

You must guarantee you have tested the app before delivering at the 8th of December.

You must have tested the app on minimum 10 different accounts and different Android phones.

Budget is $750.

You can use open-source developments to speed things up. Must be ready at 8th of December. This is very important! Must be ready and tested by you at 8th of December!

To discuss, write to us "I have experience" to explain you have experience in making this PUSH-TO-TALK / WALKIE-TALKIE GROUP APP !

Skills: Android, Java, Mobile App Development, Mobile App Testing

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About the Employer:
( 140 reviews ) Den Bosch, Spain

Project ID: #18284394

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