Wow! Nice hunt @pars11! I will try this on my phone. I have 2 kids, and I would really love to know who they chat with and if they are safe with whom they talk to.
Pros:

• it's a good thing that the friend request must be approved by parents
• your kids will have a secure conversation with the family and friends
• the app is free
• it does not require a Sim card
• kid-friendly
  Cons:
• none so far