iOS, Android ProPTT2 Applications are available on App Store and Google Play Store.
Download ProPTT2 and enjoy professional video/voice Push-To-Talk service.

Section Minimum Requirements Go to Download pagemore
iPhone Application iOS 11 or above, iPhone SE or above
* Please note iOS version supporting is paused by iOS's technical issue.
Android Application Android 4.3 (Jelly Bean or above)
Samsung Galaxy S3 or above, Galaxy Note 3 or above
Some low-spec devices may not be supported.

See Tested Device Lists


world first dual audio mode(MP3/VoIP)

ProPTT2 app supports both Full-Duplex VoIP mode and Half-Duplex MP3 mode. Users can choose one of audio mode depending on their PTT device and environment. Also ProPTT2 app supports noise reduction / low-path filter during auido input/output for sound quality.
- ProPTT2 Android/Embedded app only

Video/Voice PTT (1:1, Group, 1:N)

Communicate with users in a same channel using video and voice.
(with camera switch button)

Instant Messaging(IM)

Text chat(Group, 1:1) with users within a same channel. (Auto-deletion supported based on storage capacity/time)

1:1 Chat

Without connecting a channel, you can have a one-to-one text chat with your friend.

Transfer images

You can transfer ../images/photos on your device or take a picture and send it to other users.

Transfer location

You can transfer a location to other users.

Location sharing

User can share their location information while sending PTT.

Push-To-Talk history

Received PTT messages are saved so you can replay other users video and voice PTT. (Auto-deletion supported based on storage capacity/time)

Multi channel connection

Users can connect to multiple channels at the same time. (1:N channel- max 3 channels, 1:1 channel - no limits)
Learn more about Video Sharing [ Transmitting Video ] [ Receiving Video ]

(Sender) Real-time video transmission

A channel user can send a real-time video of the field by tapping video transmit button. (Supporting horizontal view)

(Receiver) Real-time video play

Channel users can play the real-time video that is being sent by another user. (Supporting vertical/horizontal view)

(Sender) various camera settings

Video sender can choose various camera settings such as zoom-in, zoom-out, flash, or switching.

(Receiver) Video recording

Video receiver can record and save the video on their device. (Auto-recording can be set)

(Sender) Select video quality

Video sender can select transmistting video-quality
depending on device specifications or network status.
(4 types of quality selection, manual setting available)

Voice PTT during video share

You can use voice Push-To-Talk while using real-time video share.

Instant Messaging(IM) during video share

You can do text chat while using real-time video share.

View who's on video share

You can view the sender and who is participating the video sharing on the current channel.

Supports external UVC camera connection for useful video sharing

For convenient video sharing in a various areas, ProPTT2 supports not only built-in camera in smart devices,
but also external UVC camera connections. It will helps you to use ProPTT2's real-time video sharing effectively.
- ProPTT2 Android/Embedded app only
Learn more about UVC camera

Interrupting PTT

smartphone app user can stop other users' push-to-talk, and can transmit his/her voice PTT message preferentially.
- channel's Owner/Operator only
- ProPTT2 Android/Embedded app only

SOS message

Using the activated func key, you can send SOS messages to channel users at once. (supports SOS hard key of PTT phone)
- ProPTT2 Server Package/Cloud service only

Alert message

You can receive channel alert messages sent by administrator via Admin Web.
- ProPTT2 Server Package/Cloud service only

Real-time channel synchronization

When the administrator changed and synchronized channel information, it is applied to user applications in real-time.
- ProPTT2 Server Package/Cloud service only

Competitive PTT Lock

You can push the PTT button even when receiving PTT of the others. At this time, it turns into "PTT requesting" state and when other's transmitting ends, you can send PTT right away.

Supports simultaneous output of terminal speakers during audio PTT transmission

You can change output option to hear what you speak from your device speaker. It can be used in the noisy places or you can use it like the broadcasting to connect an external speaker. (available in MP3 mode and earphone / Bluetooth output)

Mobile network (3G, LTE) only

To strengthen the service security of corporate customers, You can set up that ProPTT2 app can use only proprietary mobile networks (3G, LTE) that only users of corporate customers can access.

Supports device's IMEI and Phone number authentication

With the authentication of the user device's unique number(IMEI) and Phone number, only the user device that has been authenticated through the ProPTT2 server can be logged in and use the service.
* supported from ProPTT2 Sever Package(v3.1.2~) or above

DNS based Server Detection

Without having to enter the IP address of server, users can easily log in to the sub domain linked with the IP address of ProPTT2 server.

supports low quality audio(VBR~8kbps)

ProPTT2 app can recognize your voice to adjust the data, transmitting it with relatively low sound quality to use low capacity.

Sharing locations on App

ProPTT2 user can see member's locations in same channel.(Android version only)

Wearable app

ProPTT2 supports wearable app for Android Wear and Apple Watch. You can use your wearable device as a Push-To-Talk button. Learn more about ProPTT2 Wearable App

Bluetooth device connection

You can transmit PTT by using bluetooth headset or PTT button.

Use PTT key when screen is off

ProPTT2 supports using PTT button of device when the app is in background or the device is screen-off. Video

Convenient functions for video sharing using smart devices

When using video sharing PTT, you can use various useful functions optimized for smart devices.
-Specify an external button for the video transmission
-using video transmission when screen is off
-Auto-recording on play
*ProPTT2 Android/Embedded app only

Integration with In-door location sensors

ProPTT2 app can support In-door location sensors like a Beacon/AP.(ProPTT2 Android/Embedded app only)

Supports device provisioning

ProPTT2 app can be customized by device provisioning. then ProPTT2 app can support non-screen devices also. (ProPTT2 Android/Embedded app only)
view detail

Floating PTT button

You can send PTT message with floating PTT button even if you are using other apps or ProPTT2 app is background.
- ProPTT2 Android/Embedded app only

Homescreen PTT Widget

You can add ProPTT2 widget on your smartphone homescreen for a quick Push-To-Talk.
ProPTT2 Android app only

Support VOX

You can use VOX which PTT automatically start transmitting when you speak so you can use ProPTT2 hands-free.

Speech recognition supported on Chat

On the Chat, you can use speech recognition which identify what you speak and convert them to text.
* ProPTT2 Android app only

Display Network quality and Audio graph

Connected Network quality and When sending and receiving PTT, the network/audio state are displayed as a graph.

Change your beep sound of PTT/SOS/Alert

You can choose the beep sound for PTT Send / Receive / End and SOS / Alert message. You can also add user-created beep sounds.

Easy to change PTT channel

You can change current slot channel conveniently by setting the shortcut button.
- ProPTT2 Android app only

Lock your Push-To-Talk setting

You can lock your own Push-To-Talk settings to keep it not be arbitrarily changed while using the app.

"Invite friends to your own channel you created.
Select a friend and send/receive Push-To-Talk messages on the 1:1 channel."

Channel list

On [Channel List], subscribed/invited channels lists are displayed.To connect to the channel, just touch the [join] button.

Channel detailed information

On [channel information] screen, you could view detailed information, subsribers and currently joined users.

Create a channel/invite friend

Make your own channel and invite users on your friend lists or send SMS/email invitation message.

Channel search/subscribing

Search other user's channels and subscribe to channels you want.

Friend lists

On friend lists, added users are displayed. Select a friend and invite to your channel.

Friends' information

You can see friend's profile or see whether your friend is online or not.

Search and add friends

It's possible to search who's using ProPTT2 and send friend request to them.

Recommend App

Recommend ProPTT2 app to others via SMS/email/Facebook.

ProPTT2 Service

We provide ProPTT2 App / Cloud service to individual users/organizations
/enterprise customers by using ProPTT2 applications.