Remote accessing your raspberry pi can be pretty simple if you know how. There is no app available for raspberry pi that you can use. The first thing to do is go to raspberry pi configuration and select interfaces. it will look like this.

To start just turn on the shh and the VNC tabs and click okay. Then in the top right corner near the spot where your Bluetooth and WiFi a small thing will show up. This is the VNC logo. Click on it to go to the settings. The first thing to get started is to create an account. You can get a free trial for two weeks and then it costs about four bucks a month. to get a subscription click here. There are different versions and trials that you can get but I won’t go into that.
Once you have all of the account stuff figured out the next thing to do it to download the VNC viewer for the computer you want to remote access from. Then just enter you key(which is found in the settings by clicking the logo,) and you now can remote access. That’s all on remote accessing your raspberry pi!