As good as your tool may be, HN generally frowns on linkspam and SEO "hacking", and you happen to have placed yourself in the worst possible intersection of both.
I think you have misunderstood, as the post is specifically app store oriented. Still, I'm sure the app's authors would be delighted to see this post in an email form in their inbox.
vat,gst,bill,receipt,budget,report,finance,income,customer,profit,business,money,crm,ocr,pdf,bookkeeping,estimate
I'd generated these keyword suggestions with a tool we'd built for my startup at https://appstorerankings.net