Here are fashion apps you can use in Singapore that sell or list eco‑friendly clothing (pre‑loved, sustainable brands, or dedicated sustainable collections):

• ZALORA — has an “Earth Edit” curated section and sustainability filters for products (sustainable materials, pre‑loved, fair/eco production, etc.). (zalora.sg)
• Carousell — Singapore’s leading classifieds/recommerce app for buying and selling pre‑loved clothing; Carousell has been pushing recommerce and acquired Refash to expand secondhand fashion services. (apps.apple.com)
• REFASH — Singapore thrift/recommerce platform (omnichannel: app/online + physical stores) focused on second‑hand fashion. Now part of the Carousell group. (refash.sg)
• Vestiaire Collective — international pre‑owned luxury marketplace with an app available in Singapore; a popular choice for buying curated second‑hand designer pieces. (apps.apple.com)
• Depop — global preloved marketplace app (available in Singapore App Store) popular for vintage/secondhand and upcycled fashion. (apps.apple.com)
• Smthgood — a curated conscious‑fashion marketplace / styling app that focuses on ethical and independent brands (Asia‑focused). (apps.apple.com)

Quick tips

• Look for tags/filters like “sustainable”, “Earth Edit”, “pre‑loved”, “upcycled”, “organic” or “fair production” inside these apps (ZALORA’s Earth Edit explicitly offers filters and product tags). (corporate.zalora.com)
• Resale/secondhand apps (Carousell, Refash, Vestiaire, Depop) are a fast way to reduce your fashion footprint because they extend garment life. (press.carousell.com)

If you want, I can: 1) check which of these ship to your postal code in Singapore, or 2) find specific sustainable brands on any one app — tell me which app and I’ll look.