The general performance of the iOS Spotify application is unacceptably bad in my opinon. I planed to use my old iPhone 4 as Spotify player only at home, but there is not a chance to start a song in under a minute of waiting for the application to respond. Well its an old phone, but theres a huge number of people still using it. Mine has been reseted, theres noting installed except for spotify, every iOS feature deactivated, flight mode, playing only downloaded songs in low quality. If you are patient enough to wait for the app to let you select a song it will pauses every two seconds. 

The iPhone 4 came out 6 years ago so maybe support for it has just stopped, but the same issues started do appear on my iPhone 6s too.

Is there anything that can be done to improve the app performence? Is there a way to downgrade to previous versions?