Stack's Bowers Galleries vs Sikkaji
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Stack's Bowers Galleries
Participate in live and online auctions for rare coins, paper money, and ancient coins. Browse upcoming lots, view past results, track items, and bid in real-time. Submit photos for appraisal or consignment.
- Live and Internet auctions
- Browse upcoming auction lots
- View past sales results
- Submit items for appraisal/consignment
- Track items with watchlist
- Place presale and proxy bids
- Real-time bidding with live streaming
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Stack’s Bowers Galleries conducts live, Internet, and specialized auctions for U.S. and world rare coins, paper money, ancient coins, precious metals, and bullion. For more than eight-decades we have achieved dynamic results and realized record-breaking prices. This history guides our unwavering commitment to serve novice and expert collectors and enthusiasts, as well as industry professionals across the world. As America's oldest coin auction house, Stack's Bowers Galleries has auctioned many of the rarest coins and most valuable collections ever assembled. Our knowledgeable staff offers unsurpassed expertise in all areas of numismatics, as well as a commitment to excellent personal service. Now more than ever, collectors are bidding online, and Stack’s Bowers Galleries has invested in creating an online experience as compelling and attractive to bidders as attending our in-person auctions. The Stack’s Bowers Galleries app features our iBid Live technology and makes participating in our sales as easy as ever. Our app allows users to browse our upcoming auctions lots, view past sales results, send us pictures of items to be appraised or consigned to a future sale, track items with our watchlist, leave presale and proxy bids, and bid in real time in our virtual auction gallery that live streams video from our auction studio.
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 review sentiment: Stack's Bowers Galleries at 70% against Sikkaji's 50%. Sikkaji's advantage is update cadence (monthly vs every 3 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.
Stack's Bowers Galleries ships an update every 3 months, Sikkaji monthly. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.
| Parameter | Stack's Bowers Galleries | Sikkaji |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (269 ratings) — better | — |
| Positive reviews | 70.4% of reviews — better | 50.0% of reviews |
| Number of ratings | 269 — better | — |
| Update frequency | Every 3 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 | 126 MB | 43 MB |
| Age rating | 9+ | 4+ |
| Developer | STACK'S-BOWERS NUMISMATICS, LLC | Utsav Selarka |
Customer experience
Stack's Bowers Galleries
Sikkaji
Bugs and requests
Stack's Bowers Galleries
Reported bugs
9 issues- Search functionality is broken
- Filters are broken
- Copying links attaches extra text
- Watch list functionality is broken
- Auction catalog UI is broken
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- Cannot stop receiving messages about watched items
- Login issues due to missing country code
- App returns to the top of the list after viewing an item
- Occasional login problems
Requested features
3 requests- Allow push notifications for bids on my items
- Option to receive or not receive messages about watched items
- Return to the last viewed item position instead of the top of the list
Sikkaji
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Stack's Bowers Galleries
No in-app purchases
Sikkaji
No in-app purchases
Questions
Is Stack's Bowers Galleries free?
Is Sikkaji free?
Do Stack's Bowers Galleries or Sikkaji have ads?
Which is updated more often, Stack's Bowers Galleries or Sikkaji?
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