Hello,
Having more than a decade's experience in the IT sector, i can provide you a completely responsive application where you can access it on any device without any issues. If you check my profile, you'll notice that I am a technical lead in the sector and the client satisfaction is my utmost priority.
Upon our discussion, the bidding price can decrease, depending on the quantity of work you require and based on your expectations.
Working using an agile methodology, you'll get daily updates on the progress of your application. During which, you can ask for modifications and enhancements if they fall within the deadline.
Realistically speaking, the application would be upto your standard and it would be delivered to you within the planned date of release.
I hope to get in touch with you regarding your product.