How Apple Custom Product Pages Work With Localization (2026 Guide) If you are running App Store ads or growth experiments in 2026, custom product pages localization is the single most underused lever in ASO. Apple Custom Product Pages (CPP) launched with iOS 15 and gave every developer up to 35 alternate versions of their product page, each with unique screenshots, app preview videos, and promotional text. What most teams forget is that every CPP is itself a per locale object. A CPP built for the US market is not the same asset as a CPP built for Japan, and the moment you treat them as the same, you start leaving installs on the table. This guide explains how CPP and localization interact, the realistic math behind a 35 by 40 grid of variants, the field-by-field strategy that actually moves conversion, and the App Store Connect workflow for shipping a properly localized CPP. If you have not read our broader Apple Custom Product Pages guide yet, start there for the fundamentals.…