There are already some reviews of the LiveNation App here, here, and here. I'm going to give you the link and a screen capture.
LiveNation does make available certain presales on their app, which you can get for free: LiveNation App
UPDATE : Seems the livenation app is “Generally terrible” according to many reviewers on Bad App Reviews – but take this with a grain of salt as there is a solid 4.5 stars on the app store as of this writing.
Here are a list of presales we know about that you might be able to access using the Livenation App
- Umphrey's McGee in Detroit, MI Feb 3rd, 2024 - pre-sale code
- Madison Beer - Spinnin Tour in a city near you - presale passcode
- John Mulaney: From Scratchs show in Detroit, MI Sep 10, 2022 - presale passcode
- Alexisonfire at The Fillmore Detroit in Detroit Sep 15, 2022 - presale passcode
- IDLESs event in Detroit, MI Sep 04, 2022 - presale code
- Slash featuring Myles Kennedy and The Conspirators in Detroit, MI Mar 04, 2022 - presale code
- Moderat - More D4ta at The Fillmore Detroit in Detroit Oct 01, 2022 - pre-sale password
- Scotty McCreery in Detroit, MI Feb 10, 2022 - presale code
- Oliver Tree present Cowboy Tears in a city near you - pre-sale code
- Ashnikkos performance in Detroit, MI Nov 04, 2021 - presale password
- Teyana Taylor: The Last Rose Petal...Farewell Tour in Detroit, MI Nov 16, 2021 - presale password
- Big Bad Voodoo Daddy's Wild & Swingin' Holiday Partys performance in Montclair, NJ Dec 16, 2021 - presale passcode
- The Monkees Farewell Tour W/ Michael Nesmith & Micky Dolenz in Northfield, OH Nov 03, 2021 - presale code
- Brothers Osborne: We're Not For Everyone Tour in a city near you - presale code
- Styx at Venetian Theatre at the Venetian Las Vegas in Las Vegas Sep 25, 2021 - pre-sale passcode
- Dinosaur Jr.s event in Vancouver, BC Feb 08, 2022 - presale passcode
- Alton Brown Live: Beyond The Eats in Riverside, CA Nov 12, 2021 - presale password
- The Teskey Brothers at Orpheum Theatre in Vancouver Sep 28, 2021 - presale password
- The Front Bottoms : Live In Drive In Series in Philadelphia, PA - presale code
- Subtronics at Citizens Bank Park, in Philadelphia - presale code
- Smith & Myers's performance in Philadelphia, PA - presale code
- Pigeons Playing Ping Pong's show in Philadelphia, PA - presale code
- Mt. Joy : Live In Drive In Concert Series in Philadelphia, PA - presale code
- Lotus : Live In Drive In Series at Citizens Bank Park in Philadelphia - presale code
- Labor Day Comedy Jam Feat. Michael Blackson : Live In Drive at Citizens Bank Park in Philadelphia - presale code