Hi there,
I have read through your job description for adding social media login and doing other modifications.
I can help you well with this.
5+ years of experience
50+ apps
Relevant Skills and Experience
Knowledge of Xcode IDE(Objective-C), Swift, Eclipse IDE, Android SDK, ADT Plugin, Java Programming, JSON, XML, Utility APIs, MySQL and SQL Server database, Super level UI design
Proposed Milestones
$3000 USD - Mobile app modifications (tentative)
Please share existing app URL. Please share further requirement details so that I can properly estimate the job.