Hi, there!
I've read all of your requirements carefully, and much concerned about it. This work really attracts me, and I have done similar works before, so I have good knowledge and rich experience with Android, iOS development. I can start working right after you hire. I hope to establish a long-term relationship with you to fulfill the tasks in the future. So once you hire me, I won't let you down. Looking forward to your reply…Thank you.