okay, i see this question pop up every week and it's the same bad advice loop. start with google optimize, build your own server, use this expensive platform. lmao no. i'm impatient so here's the quick version from my logs. if you're running cpa campaigns, forget about fancy multi-page tests at first. your landing page is not the problem yet. start with element swaps on your call to action - text color, button shape, placement within 300 pixels of scroll. most tracking tools have a/b baked in but they're useless if you don't isolate traffic sources. set up a simple cloudflare worker or even just two separate lp urls with different ctas in your tracker. run it for a week, look at conversion rate per source, not overall average. citation needed on anyone saying you need special software for that. if you're doing push or native, the tool is irrelevant until you fix your asset rotation settings in the ad platform itself. stop looking for magic bullets and just log everything manually in a spreadsheet for one campaign first.