I earned pathetically $6.30 for my iOS App this quarter

Have you considered a specific nieche or industry where this app would be viable? Unfortunately although your app is sending email instantly, receivers usually don't read their e-mails instantly - most people I know dislike looking at their inboxes. I mostly check my own emails for bills around the time I expect them. You might have to consider additional notification options to make it useful. Just my 2 cents.

Send it in a Text message maybe?

There are three kinds of people in this world- those who can count, and those who can't.

I may trust a retailer with my money to make a purchase, but I won't trust that retailer with my e-mail address to get the receipt. Customers are more comfortable with the paper receipt because it's fast and requires no further time commitment associated with the purchase. If that makes their purchase 10% more expensive it's worth it to them.

Perhaps you might use what you've learned to make a different (or improved) product that appeals to a wider audience.

Not sure about 2, or 3, but the interface could definitely do with some work. Screenshots are a big part of convincing potential users to download your app (once they've found it on the app store).

From a dev point of view it looks lazy (a jqm/phonegap app, using the standard theme with a few colour changes). I wouldn't download it because I'd assume the same amount of effort has gone into the functionality as the interface (not much).

From the average public point of view it doesn't look like a normal iOS app. Rightly or wrongly, design of the interface plays a big part in the success of a mobile app (at least for iOS apps anyway).

Of course, this is assuming that there are users out there who want an app like this and are finding it on the app store.

Question: why would anyone want to use this? Who uses it or is the ideal market?

Inputting data on a touch interface is terrible, so filling out several forms looks really tedious.

I think the biggest problem here is that your target market isn't willing to pay for this problem to be solved.

I'm not sure exactly what your app does from the screenshots, but it looks like it's a way to email a receipt for a purchase to a customer? Wouldn't the business owner probably want this feature integrated with their Point of Sale system or something else, rather than retype everything into their iPhone or iPad? Or is this meant to replace a Point of Sale system?

Change the name of your app to "Send Receipts Via Email" or some variant. Also, the "1000 receipt" credit for $0.99 makes no sense..either make it a paid app or sell something like 20 receipts for $1.99 via IAP. Does your free version have any ads? Anyway, if you want to give up on the app, I'll happily buy the source code from you for $100

Invest in design as well. Many people neglect the importance of how a product looks. "If you can't make it good, at least make it look good".

wow guys thanks a lot for wonderful comments. I appreciate it. I fully agree that the interface is sluggish and boring since it has only 2 colors. I used jqm + phonegap to build this app. I really made a big mistake by using these technology. I should have just built it natively.

I have provided API for merchants to send receipt to their customer as well, which has an example here: http://binceipt.com/webservice_guide.html

20 receipts for $1.99 is way too expensive man and even more expensive the paper receipt. I guess 200 receipts for $0.99 make more sense.

$100 for my source code? In your f*cking wet dream, nanijoe and you can shove that $100 bill into your ass.

I am confident that there is a market for this as there are already more than 20 active users.

I am currently converting binceipt to native app.