TaiseiAuction vs Sikkaji
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TaiseiAuction
Discover and bid on numismatic items from around the globe. This platform offers a wide selection of gold and silver rarities, as well as banknotes, through annual and online auctions. It's a trusted source for collectors to find or sell valuable coins.
- Global numismatic item auctions
- Gold and silver rarities
- Banknote auctions
- Annual Tokyo International Coin Convention auctions
- Online auctions
- Trusted coin dealer services
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Taisei Auction specializes in auctioning numismatic items from all around the world. Numismatists and coin collectors can find a range of gold and silver rarities as well as banknotes in our annual auction during the Tokyo International Coin Convention (TICC) or via our online auctions held at various times during the year. Taisei is a trusted coin dealer of over 50 years, having worked with various government mints around the world, including the US, UK, Australia, Austria, Canada, China, Finland, France, Israel, Mexico, Netherland, New Zealand, Poland, Portugal, Russia, Singapore, South Africa, South Korea, Spain and more. Come find the rare item you have been looking for or let us sell your items at reasonable rates via our online auction service!
Sikkaji
A marketplace for buying and selling vintage coins and notes. Explore collections by category or search by name, with secure checkout for easy transactions. Guest login is available to browse listings.
- Buy and sell vintage coins/notes
- Guest login for browsing
- Explore by category
- Search by name
- Seller profile pages
- Secure checkout
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Sikkaji app is a marketplace where you can add vintage coins and notes on your collection. The sikkaji app have both buyer and seller functionality so that anyone can buy and seller their authentic coins and notes. To join as a seller in sikkaji app, you must have registered business. You can explore the app using Guest login. Explore by category or search by name. You can also explore seller listing in seller profile page. Quick and Secure checkout let you to easily purchase the vintage coins and notes.
Screenshots
Verdict
The clearest difference is update cadence: Sikkaji at monthly against TaiseiAuction's every 8 months. On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
TaiseiAuction ships an update every 8 months, Sikkaji monthly. The most recent releases landed on October 6, 2026 and October 16, 2026 respectively.
| Parameter | TaiseiAuction | Sikkaji |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 8 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 15.1 — better |
| Further details — not scored | ||
| Size | 134 MB | 43 MB |
| Age rating | 9+ | 4+ |
| Developer | Taisei Auction Corporation | Utsav Selarka |
Customer experience
TaiseiAuction
Sikkaji
In-app purchases
TaiseiAuction
No in-app purchases
Sikkaji
No in-app purchases
Questions
Is TaiseiAuction free?
Is Sikkaji free?
Do TaiseiAuction or Sikkaji have ads?
Which is updated more often, TaiseiAuction or Sikkaji?
Other comparisons
