Inkbird App vs. Engbird App

What is the difference between the Inkbird and Engbird Apps? Both are available in the Samsung Play Store.

They currently support different product models.
The INKBIRD app cannot connect directly to devices supported by the Engbird app currently. This feature is still under development.
The Engbird app supports the following models: IBS-TH1 MINI, IBS-TH1, IBS-TH1 PLUS, IBS-TH2, IBS-TH2 PLUS, IBS-P01B, ITH-12S.