Specifically with regards to iOS apps. Some apps over a certain size will not download over the cellular connection. In my case I have AT&T in an area with LTE coverage. Wifi seems to me to be a lot slower and less reliable than the LTE connection. Whether it’s the wifi in my own home, someone else’s home, a free public wifi such as at McDonald’s, paid wifi at a hotel, or the guest wifi at various places (hospitals and nursing homes are the ones I have tried) the wifi is always slower. Not just a little slower but a lot slower.
Today, for example, I am updating two apps on my iPad. One is a large game (Final Fantasy VII), the other is the Facebook messenger app. When I updated the messenger app on my phone with the LTE connection it took a few seconds. Due to the Final Fantasy app requiring wifi to update, I connected to a wifi network. The messenger app finally finished updating after about 30 minutes. Who knows how long till the other app finishes updating.
Why would Apple require a wifi network when LTE is so much better? I’m not sure if this is the best forum for this, please move as appropriate.