Mobile development

I need an iPhone app. I already have a design for it, I just need it to be built. I have need a login Screen no design required ,only you would have to call a webservice . Before bid please read the project description. IOS sign JWT with RSA key and decrypt with PHP openssl only openssl signing the JWT does not required credentials iss : ONcau00MN-ZQnYqteqf_Pv3KjGfjSqvfzeCOpPgAbcI sub: test03 exp , iat is also required grant_type:urn:ietf:params:oauth:grant-type:jwt-bearer see oauth2 for reference. 1: what we are trying to accomplish is sign a JWT with the RSA key to request an access token from the given url. 2: be able to encrypt data with the RSA key to communicate with the server. First you would have to provide me demo then I will assign whole project for whole project my budget is $1000 only 4 screen