Note Your IMEI number. Or you can use another way to check IMEI number.

2. Go in Your settings> Device> Device Information.

Device Information> More information.

Then Scroll Down and Find IMEI number.

Note and Save this IMEI number.

Save IMEI number, 

Then Go on Browser and use this link or click here : https://developer.kaiostech.com/subpo/#/list

After login Select or Find app that you want .and click on that app.

App > Version.

Then Click on Arrow.

Now Click on Test Device.

Now Put here Your IMEI number that you got from your phone.

If you want use many IMEI number then use comma , and then click on save.

Click on Save Button, Than only wait for 5 min , After a time check app in store , now app is there.