RE: " . . . but this developer did it their own way."
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Fair enough . . . except that the grey/white colour contrast is far too subtle - especially if one has any vision issues. Flipping the arrow upside down for OFF would make more sense. I am not a developer of apps, but it would seem to me that this would not be terribly difficult to do with the software.
Fortunately, as others have posted in this thread, there are other (better?) app options available.
