On iOS app invitations:
For security reasons, Crypteriums functionality will be made available to its users in stages (at this time, we are not completely sure that our services most important functions are error-free). To control this process, a limited number of special invitations have been provided to a certain part of our audience. We are planning to enable full access to Crypteriums full range of options soon (reinstalling the app will not be necessary). We apologize for the inconvenience. The procedure of launching the app this way was implemented in the interest of our community. However, it is easier to simply wait for the services full range of options to open for everyone.
Wouldn't it be better to provide a public beta version for everyone instead to just "a certain part of our audience", maybe on the testenet (using the Ethereum Ropsten testnet and a test version of your backend) ? And would be nice to publish at least the source code of the client app on github, so that other people could look at it and give you feedback about security etc. As written before, security by obscurity is not working.