Any Chicagoans or suburbs use the Ventra app for public transportation?

There's an app called Ventra, where you can get tickets for Metra, CTA, and Pace buses.

If you've used it, how reliable is it? Does it have a feature similar to air line tickets where you can get the digital pass to your smart phone's digital wallet, so you don't have to access the main app first? Is it accurate with times regarding logistics of transportation?

How quickly can you purchase tickets before the vehicles depart their location? Can you change it if something happens and you need a different route? Are the tickets transferable if the price is the same?

Any other info would be helpful, and I'd just keep the app logged in my iPhone in case i need to use it.

Yes, i use it. You don't really need it, but it allows you to see how much you have and add value. You still need a physical ventra card or have your account linked to a wireless bankcard. You can use the app to buy and use metra tickets (metra tickets do show in the app). You can't use the app to board a bus or cta train. You still need an actual card.