Short answer:

• If you mean overall shopping apps that Filipinos use to buy fashion, Shopee is the most popular. (tmogroup.asia)
• If you mean dedicated fashion apps, SHEIN (by downloads) and ZALORA (by brand focus and market presence) are the top contenders — SHEIN typically outranks Zalora on raw downloads, while Zalora is the largest Philippines-focused fashion-only retailer. (statista.com)

Notes and sources:

• Market/traffic and app-download analyses from early 2024–2025 show Shopee as the #1 marketplace in the Philippines (largest visits/downloads and biggest market share), and marketplaces like Shopee/Lazada sell the most fashion overall. (tmogroup.asia)
• App-download rankings (2024 data reported in 2025) list Temu, SHEIN and Shopee among the most-downloaded shopping apps in the Philippines; SHEIN is a global fashion specialist with very high download counts. (statista.com)
• ZALORA is the leading dedicated fashion app/retailer in Southeast Asia and remains a major fashion-specific option in the Philippines (strong brand, high ratings, steady user base). (apps.apple.com)

If you want one clear recommendation, tell me whether you care about (a) overall reach and volume (choose Shopee), (b) fast-fashion/download popularity (choose SHEIN), or (c) a fashion-specialist marketplace/brand (choose ZALORA) and I’ll pull the latest download/user numbers or app-store ranks for that specific metric.