Remember, as you start your journey with your son or daughter, to focus on the right challenge. Only a tiny proportion of UK grammar schools use computers or digital interaction of any kind when conducting an exam, and when they do it is used sparsely.
Your little one's 11 Plus success will be determined by their ability to correctly answer questions on a written exam paper using pen/pencil and paper. They will not be using iPhone apps or flashy websites on the big day, so don't kid yourself that a few Appstore purchases or an online course will see you through this.
The big day is coming, and it's your job to make sure that every aspect of that day is as familiar as possible. This is the first step on that ladder. Wherever you get your mock papers, whether here or somewhere else, do use printed exam-style mock papers that feel as much like the real thing as possible.