The smaller banner at the bottom of the page is acceptable. The full page ad that shows up at every screen change is not. To ad insult to injury, the full pager can’t be cleared for a certain amount of time .,,and then only my tapping a tiny ‘x’ that you will inevitably miss periodically, launching the page of that advertiser. All things together, you’ll spend more time circumnavigating the obnoxious advertising than actually using the app. I understand they have a right to fund themselves via advertising ... but c’mon! It’s clear the developer it’s attempting to annoy the user into paying a subscription. Yes... not a one time fee...a subscription ...just to see the same live rankings provided on numerous other apps (including the ATP/WTA’s own app) and websites at no charge without being battered by ads. Pass on this one.
Note: I suspect the positive reviews may be employees, friends, family of the app developer because nobody would find this acceptable.