Google is doing a lot of things wrong, but this is not one of them. Look at the apps's description and decide if it's spammy by yourself.
Artists include: Grateful Dead, moe., Max Creek, Phil Lesh and Friends, Umphreys McGee, Disco Biscuits, Radiators, String Cheese Incident, Blues Traveler, 311, Jack Johnson, Smashing Pumpkins, Yonder Mountain String Band, Tea Leaf Green, Railroad Earth, Furthur, Ratdog, North Mississippi Allstars, Derek Trucks Band, Perpetual Groove, Drive-By Truckers, Mr. Blotto, Donna the Buffalo, Strangefolk, Brothers Past, Hot Buttered Rum, Jerry Joseph and the Jackmormons, Keller Williams, Sound Tribe Sector 9, Little Feat, Guster, Ween, The Breakfast, New Monsoon, Cornmeal, Grace Potter and the Nocturnals, JJ Grey and MOFRO, Ryan Adams, The Bridge, New Riders of the Purple Sage, Dark Star Orchestra, Steve Wynn, Ryan Montbleau, Lotus, Greensky Bluegrass, The Dead, Zero, The Brew, Club d’Elf, Local H, Bela Fleck and the Flecktones, Of A Revolution, Jerry Joseph (solo & side projects), Infamous Stringdusters, Matisyahu, Camper Van Beethoven, Pat McGee Band, Garaj Mahal, Raq, Benevento/Russo, My Morning Jacket, Michael Franti and Spearhead, Cowboy Junkies, Animal Liberation Orchestra, Assembly of Dust, God Street Wine, Soulive, Dopapod, Steve Kimock Band, Moonalice, Mike Mizwinski, The Gourds, Steve Kimock, Charlie Hunter, Larry Keel, Acoustic Syndicate, Robert Randolph [and the Family Band], Dumpstaphunk, The New Deal, Toubab Krewe, Nate Wilson Group, Del McCoury Band, David Nelson Band, John Butler Trio, Karl Denson’s Tiny Universe, The Codetalkers, Matt Nathanson, New Mastersounds, JGB, Lazlo Hollyfeld, Jacob Fred Jazz Odyssey, Mickey Hart Band, Zach Deputy, Mysterytrain, Spin Doctors, The McLovins, Band of Heathens, Particle, Rusted Root, John Mayer, Low, The Heavy Pets, Mogwai, David Gray, Robert Hunter, Sam Bush, Mountain Goats, Big Head Todd and the Monsters, Godspeed You Black Emperor!, G. Love and Special Sauce, Glen Phillips, Kung Fu, Trampled by Turtles, Dirty Dozen Brass Band, The Motet, Lettuce, Gomez Warren Zevon, Big Daddy Love, Bushwalla, Emmitt Nershi Band, Garcia Birthday Band, Marco Benevento, Rubblebucket, Carbon Leaf, Elliott Smith, Virginia Coalition, indobox, Giant Panda Guerilla Dub Squad, Explosions in the Sky, Papadosio, Tim Reynolds, Bob Weir, Future Rock, Moon Taxi, Toad The Wet Sprocket, EOTO, Buckethead, Dubconscious, Rhythm Devils, Addison Groove Project, BoomBox, Roots Of Creation, Billy Corgan, Death Cab for Cutie, Indecision, John Brown’s Body, The Pimps of Joytime, Donavon Frankenreiter Band, …And You Will Know Us By the Trail of Dead, Los Lonely Boys, Hank Williams III, DJ Logic, Zoogma, Alabama Shakes, Citizen Cope, Greyboy Allstars, Cosmic Dust Bunnies, Vertical Horizon, Telepath, The Verve Pipe, Pinback, The DJ Williams Projekt, Blind Melon, Gin Blossoms, Fugazi, 2 Skinnee Js, Tenacious D and many more.
If I were to put out an app that gave you access to research journals, should I not list the journals that I give you access to? I, honestly, don't see this as spammy. But I must confess that I don't really know much about Vibe Vault so maybe there is something I'm missing. Or maybe there is a separate "contents" page in the app store listing where that would be appropriate.
To me, "spammy" would be listing unrelated or marginally related things, to show up in edge-case searches. Perhaps "DJ, party, entertainment" etc. would be spammy. Listing your contents? I respectfully disagree.
Artists include: Grateful Dead, moe., Max Creek, Phil Lesh and Friends, Umphreys McGee, Disco Biscuits, Radiators, String Cheese Incident, Blues Traveler, 311, Jack Johnson, Smashing Pumpkins, Yonder Mountain String Band, Tea Leaf Green, Railroad Earth, Furthur, Ratdog, North Mississippi Allstars, Derek Trucks Band, Perpetual Groove, Drive-By Truckers, Mr. Blotto, Donna the Buffalo, Strangefolk, Brothers Past, Hot Buttered Rum, Jerry Joseph and the Jackmormons, Keller Williams, Sound Tribe Sector 9, Little Feat, Guster, Ween, The Breakfast, New Monsoon, Cornmeal, Grace Potter and the Nocturnals, JJ Grey and MOFRO, Ryan Adams, The Bridge, New Riders of the Purple Sage, Dark Star Orchestra, Steve Wynn, Ryan Montbleau, Lotus, Greensky Bluegrass, The Dead, Zero, The Brew, Club d’Elf, Local H, Bela Fleck and the Flecktones, Of A Revolution, Jerry Joseph (solo & side projects), Infamous Stringdusters, Matisyahu, Camper Van Beethoven, Pat McGee Band, Garaj Mahal, Raq, Benevento/Russo, My Morning Jacket, Michael Franti and Spearhead, Cowboy Junkies, Animal Liberation Orchestra, Assembly of Dust, God Street Wine, Soulive, Dopapod, Steve Kimock Band, Moonalice, Mike Mizwinski, The Gourds, Steve Kimock, Charlie Hunter, Larry Keel, Acoustic Syndicate, Robert Randolph [and the Family Band], Dumpstaphunk, The New Deal, Toubab Krewe, Nate Wilson Group, Del McCoury Band, David Nelson Band, John Butler Trio, Karl Denson’s Tiny Universe, The Codetalkers, Matt Nathanson, New Mastersounds, JGB, Lazlo Hollyfeld, Jacob Fred Jazz Odyssey, Mickey Hart Band, Zach Deputy, Mysterytrain, Spin Doctors, The McLovins, Band of Heathens, Particle, Rusted Root, John Mayer, Low, The Heavy Pets, Mogwai, David Gray, Robert Hunter, Sam Bush, Mountain Goats, Big Head Todd and the Monsters, Godspeed You Black Emperor!, G. Love and Special Sauce, Glen Phillips, Kung Fu, Trampled by Turtles, Dirty Dozen Brass Band, The Motet, Lettuce, Gomez Warren Zevon, Big Daddy Love, Bushwalla, Emmitt Nershi Band, Garcia Birthday Band, Marco Benevento, Rubblebucket, Carbon Leaf, Elliott Smith, Virginia Coalition, indobox, Giant Panda Guerilla Dub Squad, Explosions in the Sky, Papadosio, Tim Reynolds, Bob Weir, Future Rock, Moon Taxi, Toad The Wet Sprocket, EOTO, Buckethead, Dubconscious, Rhythm Devils, Addison Groove Project, BoomBox, Roots Of Creation, Billy Corgan, Death Cab for Cutie, Indecision, John Brown’s Body, The Pimps of Joytime, Donavon Frankenreiter Band, …And You Will Know Us By the Trail of Dead, Los Lonely Boys, Hank Williams III, DJ Logic, Zoogma, Alabama Shakes, Citizen Cope, Greyboy Allstars, Cosmic Dust Bunnies, Vertical Horizon, Telepath, The Verve Pipe, Pinback, The DJ Williams Projekt, Blind Melon, Gin Blossoms, Fugazi, 2 Skinnee Js, Tenacious D and many more.