This is probably one of the simplest and most useful apps/websites out there. UmbrellaToday.com has been around for a few years but they recently launched an iPhone app for $1.99. You don’t really need to spend the money for the app since you can just log on to their website and sign up for email or SMS alerts for free. Once you log on to the site, just input your location and you will get a ‘yes’ or ‘no’ answer. Below is a spot to input your email or cell phone number and on days it’s expected to rain, you’ll get a notification letting you know whether you should bring your umbrella today.