iOS | App2Track closes itself automatically. How do I fix this?

How annoying that App2Track is closing itself!
When this problem happens, could you try restarting your iOS device?
Open App2Track again and check if App2Track works as expected.
If this was not the solution? Then read on. 

Step 1. Go to Settings on your mobile phone.

Step 2. Choose General.

Step 3. Select iPhone Storage.

Step 4. Click on App2Track. 

Step 5. Choose Delete App.

Step 6. Conform by clicking on Delete app.

Go to the Appstore and download App2Track again. 
Is App2Track still closing itself? If so, please contact App2Track's support department.
We can be reached by email at support.app2track@optimizers.com.