Exercixe Android app suggestions

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Please could someone recommend a good app for exercising in Android? Is for an elderly woman so it should have moderate routines, have sounds alerts for when to exercise and when to rest indicates and if possible shows clear pictures with examples of the exercise or announces it with voice. Have been trying different apps in last weeks but none that fit the best.

One that looked promising was Freeletics but it was too complicate to make it work every time.

Thanks in advance for any valid suggestion.