PALO ALTO — They say imitation is the sincerest form of flattery. But for mobile app makers, it can pose a real threat to the bottom line.

One of Howard Hogan’s clients learned that firsthand. Outfit7, which has a development office in Palo Alto and is headquartered in London, is best known for its Talking Tom Cat and Talking Friends mobile apps. But the “Talking Tom Cat 3″ available for download in late 2012 was placed in app stores by a China-based app company. And it too featured an anthropomorphic feline.