App stable on my device, but it crashes on other devices

Hello Koders
I have some questions regarding planning to get a stable app out of our platform

  • Is there a relationship between the stability of the application with the device that I use with a companion?
    For example, I use oppo A93 with a companion. Before that, I used a Huawei device, and every time the application after downloading is stable with the device I used as a companion
    Also, there are some errors that occur with other devices, despite the stability of the application on my personal device, which is used with the companion (oppo A93). Is there an explanation for this?
    second question
    What are the basic steps that I must follow to get the best stability from the application
    Another question
    How can I reduce data download from firebase
    thank you all
    Thank you Kodular