Why doesn't the traffic recorded by Pomatio match that of Google Analytics or other tools?
Tools like Google Analytics exclude bots, trackers, crawlers/spiders and similar from their analytics so that their data can be used to draw useful conclusions for your business, so they do not show the actual number of visits you receive.
The purpose of the Pomatio traffic monitor is to count total visits for the calculation of your plan (since its cost depends on the number of monthly visits your website receives), so all visits, whatever their nature, will be recorded.