PDF Reader - Viewer, Edit PDF

PDF Reader - Viewer, Edit PDF by Zenstack Labs peaked at #1 on Google Play on 2026-09-03, and over the last 30 days it has averaged around #2 with a best of #1, indicating recent strong performance. Currently, however, the app is showing a clear declining trajectory across all tracked charts, with its strongest positions at #5 on the Top Free chart in Poland, Portugal, Thailand, and Turkey, all of which slipped 2–4 places. Mid-tier rankings have weakened more sharply, with Switzerland down 5 spots to #8, Belgium down 7 to #15, Israel down 8 to #16, and Austria down 7 to #19. Overall, the app is sliding from its peak and losing ground simultaneously across multiple European and Asian markets.