End Google Ads 201810 - BS.net 01 --> Hello every one.

First of all I am sorry which put this question here, cause it is not relevant to this part. frankly, I couldn't find any proper forum.

I wana write and database application which run on Iphone. I don't know who to start Iphone programming. does any one any article or any experience and help me in this matter.
What do I need to start an Iphone application programming. which environmnet I can write the codes.

Please help me!!!!!