Eleftheriou claims the company is exploiting its monopoly power over iOS apps "to make billions of dollars in profits at the expense of small application developers and consumers".

Eleftheriou's company KPAW LLC, which he co-owns with his partner Ashley Eleftheriou, filed its complaint in Santa Clara County on Wednesday. It details the development and release timeline of Eleftheriou's Apple Watch keyboard app FlickType.

At the time he began accusing Apple of abetting App Store scams early last month, Eleftheriou revealed that his FlickType app had been targeted by competing software he says either didn't work well or didn't work at all, and yet nonetheless chipped away at sales and App Store rankings through false advertising and the purchase of fake reviews.

After he complained, he said Apple did not do enough to combat the scams, though Apple did later remove some of the apps he flagged.