Face++ - API for face detection – also detects gender, age, pose
PhoneClean - PhoneClean is the best and even free iPhone cleaner software for all your iPhone cleaning, maintaining and privacy protecting needs. It brings you the new iPhone, iPad experience that you will appreciate every day.
TrueFace.AI - A facial recognition API with picture attack detection
Macgo iPhone Cleaner - Macgo iPhone Cleaner is an excellent iOS cleaner tool.
Knoto - Send photos to friends automatically using face recognition
CleanMyPhone - iPhone Cleaner is designed to free up storage space on iOS devices by removing junk files and Documents & Data, other data etc.