GROL Plus:
Does not drill on missed questions.
Has practice test.
Has electronic schematics.
No help file.
Dauntless five by five:
Does not drill on missed questions.
Does ask questions; till the question is answered right once.
Anyone could accidentally get the answer right, to a multiple choice question.
Or ask questions; till clicking exit or grade.
Or ask questions; till you have seen each question once.
Has practice test.
Has electronic schematics.
No help file.
RadioTelephone Tutor:
Drills on missed questions.
The more times you miss a question; the more times you must answer it right.
Has practice test.
Has electronic schematics.
Has video help guide.
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