Hello Kenton,
I have good experiences in Android & IOS web platform Firebase, Ionic, I have completed projects similar to your requirement in the past. I've developed several apps such as Dating, Shopping, Health/Fitness, Photo & Video sharing, Taxi Booking, Food delivery and etc.
If you could share your project detail requirements, I will share relevant past work and demo.
I already developed 100+ apps and websites for Android, IOS & Websites as per the Google Store and iTunes, domain standards.
Thank you and I look forward an opportunity to work with you.
Regards
Shesh