Short answer: It depends on your city, but the fastest fashion delivery apps in Australia are generally Amazon (Prime) and The ICONIC — with Zara, David Jones and Myer also offering same‑day or next‑day options in major metro areas.

Quick details

• Amazon (Amazon app / Amazon Prime): Amazon has rolled out Prime same‑day delivery for eligible items in major metro areas (Sydney initially, then expanded to other cities including Perth in 2025). Where Prime same‑day is available you can often get eligible clothing delivered the same day if you order before the app’s cut‑off time. (aboutamazon.com.au)
• The ICONIC (The ICONIC app): The ICONIC has expanded faster delivery tiers (including same/next‑day and a “Twilight” evening delivery option) in metro markets such as Melbourne and Brisbane as part of 2024–2025 improvements. It’s a fashion‑focused app so selection + fast metro fulfilment is strong. (mi-3.com.au)
• Zara (Zara app / website): Zara offers same‑day delivery in Sydney (orders before the site/app cut‑off) and next‑day delivery in major cities. Good option for fast high‑street deliveries where available. (zara.com)
• Department stores (David Jones, Myer): Both offer metro same‑day or same‑day click‑and‑collect services (order‑by‑midday for same‑day metro delivery/collection), so their apps can be fastest if the item is in‑stock locally. (davidjones.com)

What to check in the app

• Availability by postcode/city (same‑day is usually metro‑only).
• Item eligibility (some SKUs aren’t stocked locally).
• Cut‑off time and delivery fee (same‑day options usually have higher fees).

Bottom line

• For the broadest same‑day coverage across categories (including clothing) in Australian metros, Amazon Prime is the most consistent option where it’s available. For fashion‑specific selection with fast metro fulfilment, The ICONIC is usually the fastest. Zara, David Jones and Myer are good alternatives in the cities they support. (aboutamazon.com.au)

If you tell me which city or postcode you’re in I can check which of these apps currently offers same‑day delivery for fashion to your area.