Spotify is setting its mobile app for free. The streaming music service said on Wednesday that it would allow anyone on an iOS or Android tablet or smartphone to use its app free of charge. The new service launches on Wednesday. Previously, users could only listen to Spotify’s desktop or browser-based program for free, and only premium members who paid $10 a month had access to the service through other devices. The move marks a change in Spotify’s business and could potentially expand its potential base of listeners. The lack of a free mobile app has been one of its inhibitors of growth, and addressing that end could help it keep its growth momentum going. The tablet app works just like the desktop version, giving you access to specific select tracks. The smartphone app, however, doesn’t work exactly like the PC service.