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i started out with NRC, but after some mishaps with updates I switched to ispeedrun for some time. Once WorkOutDoors incorporated intervals, I really like it. The built in workout app is solid though, and people that want no frills, & something simple to use, that would be it. My daughters both run long distance, but aren’t geeky in anyway, and probably wouldn’t have the patience to learn the advanced features of ispeedrun or wod. With its guided runs I wish NRC allowed exporting of its data.
 
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