IBBQ4T not graphing

I have had my thermometer for several years and tonight when I put a brisket on for an all night cook, I noticed the graph is no longer working. This is very unfortunate considering the price of brisket.

I went to the App Store to see if I needed an app update and I can no longer find InkBird pro app on the Apple App Store. Please advise.

Sorry, the INKBIRD pro app has stopped updating. Please download INKBIRD APP for use. Can it work?