Snapchat used to sometimes takes FOREVER to load for me. Then I found out a couple of things:
- Snapchat works better on Wifi then it does when you're susing up data.
- The speed at which the app runs s usually down to your phone or your internet connection
- On Snapchat's side, when the app is being used a lot (i.e. Peak times) then it might also lag a little, because their servers are dealing with a lot of requests.