Apps with 'Stealth mode' feature

  1. Photok is a free Photo-Safe. It stores your photos encrypted on your device and hides them from others. It uses technologies like, AES-256 encryption standard or bcrypt, to keep your photos secure. Photok is completely free, open source, and contains no ads.
  2. RioSPY is a cell phone spy and tracking software that lets you monitor ALL the activities of iPhone and Android phone.