PROTECTION FROM TEACHER: Call From Mom and Clock
John is cheating on his grand test. The Teacher notices that and tries to take his phone.
Excuse me, my mom is calling, says John and shows the screen to the Teacher. There is a phone call from Johns mom.
Go to the hall and pick up the phone, she suggests.
In the hall John taps on the lest top corner of the screen and there is a solved task as before! He remembers the solution and comes back to the classroom.
His mom didnt call him. John has turned on protection from the teacher.
There are 2 types of protection in Chemistry X10 Call From Mom and Clock. Clock works by default, Call From Mom is available in Pro-version.
Pro-version is a service upon monthly subscription. It gives you infinite gems and access to features which are available only in Pro-version: protection from teacher Call From Mom and detailed solution of tasks. Pro-version costs 1.99 USD (equivalent in local currency) per week.
Subscription will be updated automatically if you don't turn off auto-extension of subscription 24 hours before current subscription expiration. Payment will be proceeded from your iTunes account during 24 hours before current subscription expiration.
User can manage the subscriptions. You can turn off auto-extension after purchase in account settings.