Hello sir,
We can update and maintain your app server as we already in same field.
We have expert Web and Mobile app developer with great experience in the field you mentioned.
We have developed many sites and mobile apps before and maintaing them also.
Skills set - Swift, Xcode, React native, Android studio, Sqlite, cloud services, firebase, in-app purchase, payment gateways,google API integration, Third party API integration, UI, UX, PHP, Angular, Node js, React js, MVVC,XML, Jquery, SQL Server, HTML 5, CSS3, JAVA, API, Backend Admin panel, Core and many more.
Inbox me so I can share some of my past work -
I am aiming to form a long-term working relationship and glad to answer any questions you may have!
Thanks Regards
Clarigo