Short answer: I couldn’t find any Singapore mobile apps that have a dedicated in‑app collection or feature explicitly marketing “rings inspired by Taylor Swift’s engagement ring.” As of Sep 13, 2025, the Taylor‑inspired pieces available in Singapore are sold through jewellery shops and marketplace apps (listings), not as a branded app feature. (zula.sg)

Where people in Singapore are finding Taylor‑style rings

• Singapore jewellery shops and blogs have highlighted Taylor‑inspired or vintage/bezel‑set rings (examples: local jewellers and articles recommending similar styles). (blissfulbrides.sg)
• Marketplace apps used in Singapore (Carousell, Shopee, Lazada) and international marketplaces (Etsy) have listings for “Taylor‑inspired” or “Eras” rings and other Swiftie jewellery — i.e., sellers list lookalike rings rather than an app launching an official Taylor collection. (carousell.sg)
• International jewellery brands and retailers (Brilliant Earth, Vrai, independent designers) are producing rings inspired by Taylor’s bezel/old‑mine/vintage look; these can be purchased in Singapore via their sites or local resellers. (theknot.com)

If you want, I can:

• Search specific Singapore apps (Shopee, Lazada, Carousell) for current listings and pull a few live examples/links.
• Show local jewellers in Singapore offering vintage/bezel‑set designs that match Taylor’s engagement style.

Which of those would you like me to do next?