Thank you very much for the quick answer. I tried that one 2 days ago and although I have a developers account in ios and I could upload the ipa file to my phone, It gave a general error message that the app could not be installed. Since the error message is so general, I had no idea where to look. I tried a different developer account, different certificate, ... but no luck. So , since I'm a developer myself , I had hoped to write the app in a technology I know and add features along the way. If I could just get already the values in the nightscout site.. then I'm up and running for the first part of the loop.