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How to Use

Flea Market & Price Search

Flea Market & Price Search lets you compose a search once and compare the results across Japan's marketplaces — flea-market, auction and online-shopping sites — without typing the same keyword into each app one at a time.

When you search, the app opens each marketplace's own live official results page in an in-app browser tab. Switch tabs to compare, and tap Open in official app to buy or bid. The app never scrapes, re-renders, or re-hosts listings — what you see is each site's real page.

Choose your sites first

  • Open 比較サイト設定 (Search-site settings) from Settings.
  • Turn marketplaces on or off, and drag to set the order your tabs appear in.
  • Your choice is saved once and reused for every search — it isn't set per-search.
  • Supported sites include Mercari, Rakuma, Yahoo Auctions, Yahoo!フリマ, Amazon, Rakuten, Yahoo Shopping and Kakaku.com.

Search every marketplace in 3 steps

  1. Compose your search. Enter a keyword and, optionally, a price range, sale status (on sale / sold), and a sort order.
  2. Tap Search. The app builds the correct search URL for each of your sites and opens them as in-app browser tabs.
  3. Switch tabs to compare. Flip between marketplaces to compare prices and find the cheapest, then tap Open in official app to complete the purchase.

Save and reuse searches

  1. Save a favorite search. Tap save on any search to keep its keyword and filters. Saved searches can be reordered.
  2. Reuse from History. Recent searches are kept newest-first so you can re-run them in a tap.
  3. Re-run anytime. Tap a saved search or a history entry to open all your sites again with the same conditions.

Optional: new-listing alerts

For a saved search you choose, the app can quietly check for new listings on your device and let you know when something fresh appears. Alerts are off by default and entirely on-device:

  • The app only computes which listings are new — it stores identifiers (a hash of the listing's URL), never titles, prices, or images.
  • Notifications show a count only (e.g. "New listings for 'keyword'") and tap through to the search.
  • Nothing ever leaves your device — there is no server and no tracking.

Tips & tricks

  • Reorder sites you check most Put your go-to marketplaces first in 比較サイト設定 so their tabs are one tap away.
  • Filters degrade gracefully If a site doesn't support a filter (for example a price range), the app simply omits it for that site rather than sending a wrong query.
  • Each site has its own rules Marketplace pages load directly on your device like a normal browser, so each site's own login, cookies, and policies apply while you view it.
  • Not affiliated The app is independent and not endorsed by any marketplace. All service names and trademarks belong to their owners.

Troubleshooting

  • A tab won't load? Check your internet connection and try the tab's reload — the marketplace page loads live, the same way a browser does.
  • A site asks you to sign in? That's the marketplace's own page; sign in there as you normally would, or tap Open in official app.
  • No results on one site but results on another? Each marketplace interprets keywords and filters differently — try a broader keyword or drop a filter.
  • Still stuck? Reach out at our contact page.