1- Kids Place
"Kids Place is an app created for parents who want to control their children's activity and Screen Time on phones and tablets. Kids Mode parental control features give parents lot of flexibility on how to configure their phone and tablets to limit screen time; block ads and in-appropriate content."
2- Screen Time Parental Control
"Screen Time is a free to use parental control app that helps parents manage and control the amount of time their kids spend on smartphones and tablets. From your own phone, you can limit your kids’ daily use, block specific apps, approve new apps, block certain times of day (e.g. bedtime) and reward extra time for good behavior!"
3- Kids Zone
"Kids Zone's main function is to child-proof a device by limiting a child's access to only the apps a parent picks, however, the app also features the following child lock features:
- Enforces screen-time limits reducing a child's device usage
- Blocks in-app purchases and installs from the Google Play store
- Blocks children from phone calls and texts (unless allowed)
- Prevents children from browsing the Internet
- Protects children from Facebook, Instagram, Twitter, Snapchat & other social media
- Blocks your child from reading device notifications
- Re-locks automatically if the phone or tablet is rebooted
- Prevents all apps from being uninstalled
- Automatically reloads games or other apps for small children
- Protects all device settings and contacts from being changed
- Hides your personal data from your child's eyes."