Similar to how Ravenclaw students must correctly answer a riddle to enter their common room at Hogwarts, the Vivo app Unlock Lessons makes children answer a question related to what they are learning at school to unlock their parent's smartphone. From a Brazilian telecom company, the app uses education questions to make children learn before granting them access to mobile and tablet devices.
A digital spin on the concept that kids have to finish their homework before they can play, the Vivo app only enables youngsters to unlock phones once they can answer questions based on subjects they are learning about. Parents download the app and input what grade their child is in and what subjects they are enrolled in.
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