ShareRoom -Whiteboard and call

This app is an application that allows users who participate in the same room name to share the whiteboard and make voice calls. -No account required.
You can use it in various situations where you want to share diagrams remotely, such as remote work or telecommuting meetings.
-- Main Features --
- Low Latency Whiteboard Writing
- Pinch-in, pinch-out and two-finger dragging of the board
- voice call
- You can easily invite guests via email or social networking.
- Work on WiFi, 4G/LTE and 3G networks.
- Connect with anyone on a variety of iOS devices.
- Supports loading and saving whiteboard images.
-- How to use --
Everyone will join with the same room name.
Drawings on the whiteboard will be shared with everyone.
You can pinch in and out with two fingers to drag the board.
Swipe from the left edge of the screen to the center to display the menu.
You can change the user name list and pen color, and turn on/off the microphone.
At startup, the microphone is off, so to make a voice call, press the microphone button.
You can pressing the ShareLink button to invite people to your room with a link to your email or social networking site.