* An app which downloads all the invoices received as email attachment in the last quarter (in order to send them to the accountant). * An app which identifies

* An app which downloads all the invoices received as email attachment in the last quarter (in order to send them to the accountant). * An app which identifies the 200 hashtags most frequently seen in Instagram's top posts containing a given hashtag. For both of these projects, a factor leading me not to start marketing them was the complexity and risks in relying on Google and Facebook APIs as data sources, respectively.