Maybe instead of just saying that you have developed "iOS apps" you should at least also say what their names are so that the members especially the OP will know what you have really developed. Not only will it save us time but it will also help what you are pitching him. Instead of just backing it up with your blog post what you should include is the project portfolio you have which will also be helpful. I'm just saying this because most the low ranking members here ranging from jr. members to newbies in the project development always try to offer their service but what they forget is to post their credentials with their previous works backing them up.