App developer for small tweaks

I am looking for someone to help me with small tweaks and bug fixes, implementing ads into my apps and setting up in app purchases. Also help with app submission to itunes is needed. This is an ongoing work as I have constantly new apps to work on. I have a pic reveal app with 75 images to reveal, I want to add another 75 images as an inapp purchase. Please leave your bids on this task. Thank you