Now that Dorian has wandered on its way, leaving us mostly unscathed, my 'Monday Morning QB' attitude has these observations about 'Weather Apps'. I can't say enough good things about 'My Radar' as well as my stalwart, 'Windy'. In a similar class is 'Ventusky' which has a nicer display but slower updating as things change. I suspect that the sources for Windy ( ECMWF or GFS) are quicker to use and display new information. The GFS actually does seem improved somewhat over past recent years, but the Euro model, although only updated by Windy every 12 hrs, will remain my 'go to' default at least for now.
Dark Sky is very accurate if & ONLY if it has good local feeds for radar and solid feedback from the area being researched. This excludes a lot ( including me) as its coverage shines for USA & UK but is a bit weak away from populous areas. It's far from unique that way as I've found that getting good accurate & timely local information from US based sources to be a tedious process. Very unfortunately, The Weather Channel App as well as Accuweather also have this downfall.
Now feeding 'Crowdsource' data ( both from private user weather stations as well as a feedback function in its revised app is Wunderground. I believe it's base information is 'The Weather Company as it's co-owned, BUT the Crowdsourcing features and it's simplicity of display made it a star for me as we watched the storm ( Dorian) develop, approach, pass, then leave peacefully. It's not for me to say, but if The Weather Company was to avail itself to the same local information that Wunderground can (?) and update or amend it's own displays it would be great information presented in a familiar fashion.