This app was mentioned in 1 comment, with an average of 2.00 upvotes
If you have an Android phone.
https://play.google.com/store/apps/details?id=com.bantambytes.android.app.addingmachinewithads&hl=en&referrer=utm_source%3Dgoogle%26utm_medium%3Dorganic%26utm_term%3Dadding+machine+app&pcampaignid=APPU_1_EspIWJD_DIHgmQH4nqeoDg