Greetings Sir/Madam,
I am an Android Developer. I have designed and developed a lot of Android applications. I understand that you want to update the UI design of your app. I can do the required job for you.
Looking forward to hearing from you soon.
Thank you.
I'm an android user interface expert. I'll easily make UI changes to your app. I'm also well experienced in firebase as I have built many apps using firebase and I'll easily integrate Firebase login to your app. let's talk details over the chat.