https://www.vice.com/en_us/article/qjdjy3/nevada-demoracts-caucus-app-errors

As the app used to report caucus results in Iowa failed, volunteers for the Nevada State Democratic Party encountered errors while testing their own version of the app made by the same company, Motherboard has learned. Once a test version of the app was distributed, volunteers were quickly met with an error when trying to submit caucus results, according to a source and a review of the app by Motherboard. Volunteers encountered the error when they received the app earlier this month and up until this week, according to the source. The Nevada caucus is scheduled for February 22.

Nevada Democrats have already said they will not use the app after a failure with the Iowa app spread chaos and confusion in this week's caucus. But the news shows the continued risk of using apps and internet connected technology to report early results in elections, and highlights again how the company behind both the Iowa and Nevada apps, called Shadow Inc., developed a product that potentially had issues. The app was never designed to tabulate final vote counts that officially determine the winner, but instead is used to give early vote totals for real-time reporting.