Live:Air Action In-App Purchases – Teradek

As of release date - April 4, 2019 the following in-app purchases are available

Source Multi-Selection Enables PiP (Picture in Picture) and Group Arrangements	$9.99
Third Live Source Ingest one additional live video feed	$9.99
Fourth Live Source Ingest one additional live video feed	$9.99
Fifth Live Source Ingest one additional live video feed	$9.99
Sixth Live Source Ingest one additional live video feed	$9.99
Chroma Key Enables chroma key compositing	$9.99
Record Program Record your live stream while you broadcast	$24.99
Instant Replay Capture a video buffer and play it back at different speeds	$24.99
Stream Chat View comments in real time from Facebook, YouTube, and Twitch	$9.99
GIF Support Add animated GIFs to your stream as overlays!	$4.99
Scoreboard Timer / Clock Create counting timers or display the time	$4.99
Program Resolution Limit Enable streaming at up to 1440p	$4.99
Program Framerate Limit Enable streaming at up to 60 fps	$4.99
Audio File Support Add custom mp3 tracks to your stream	$9.99
External Streams Add custom RTSP or MPEG-TS sources	$49.99
Local Monitoring View your program stream locally with Vuer/VLC	$9.99

If you have any problems, you may need to contact Apple to authorize the purchase.