Yes, you can add the custom launch screen images on the Apptuse panel. Just follow the steps mentioned below to add the custom launch screen images.
1. Login to Apptuse.
2. Click on Dashboard button of your app.
3. Go to Design page from the left sidebar.
4. Go to Launch Screen section on Design page and under the Advanced section upload your custom launch screen images of the size mentioned over there.
5. You can also disable/enable the custom launch screen for the app.