DataShredder 对比 DNS Root Explorer 的使用情况和统计数据

If you're worried about your personal data in your storage when you throw away or sell your phone, this app is for you. Even if you delete files from your phone, your data may still be there in the free space on your storage. This app works by filling the free space with meaningless data so that your personal data is not left behind. Use this app before you get rid of your phone.