Very Sluggish!!!!

Trying to download books - cannot believe how long it takes - I have to wait & wait; can’t walk away to do anything else; the minute I try that; the iPad or iPhone ‘goes to sleep’ & I have to start over. The icon just spins & spins & spins & spins! I spoke w/an Apple tech. They say the problem is w/the App! So, now what? It is making me crazy!!!!!! Now, I cannot even submit this unless I create a nickname - everything taken…………………..

KindleMad about Kindle Classic, v1.12.4