Hmm, has it really failed? Isn't it too early to decide on that after just 3 or 4 months of running it? Even more so that your adwords campaign seems pretty sub-optimal if you can spend only $2 a day.
Have you tried optimizing the campaign, your landing pages and your sales funnel? That's where I usually spend most of the time for a product. Building is a walk in the park compared to the work I have to put into sales optimization.
Development is just a small part of running a software business. I'm not saying you should ride a dead horse - I guess you have more reasons to believe your product failed than you stated in the blog post - but keep for your next project in mind that you shouldn't give up too quickly.
Have you tried optimizing the campaign, your landing pages and your sales funnel? That's where I usually spend most of the time for a product. Building is a walk in the park compared to the work I have to put into sales optimization.
Development is just a small part of running a software business. I'm not saying you should ride a dead horse - I guess you have more reasons to believe your product failed than you stated in the blog post - but keep for your next project in mind that you shouldn't give up too quickly.