Comparison

Block’s Marble Auctions vs Koso App

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Block’s Marble Auctions

Participate in live marble auctions from your mobile device. Preview upcoming lots, track your bidding history, and receive notifications for items of interest. This app allows you to bid on antique, vintage, and contemporary marbles and related collectibles.

Highlights
  • Preview upcoming lots
  • Watch live auctions
  • Bid in real-time
  • Quick registration
  • Track bidding history
  • Push notifications for items of interest
Features
Read full description

Block's Marble Auctions, located in Trumbull CT was established in 1989. The auction house conducts numerous sales a year with a focus on antique, vintage and contemporary marbles and marble related items. Our auctions feature an impressive selection including Antique Handmade, Antique and Vintage Machine Made, and Contemporary Handmade Marbles, as well as other items of interest to marble collectors. We have been featured numerous publications and tv and radio programs. Blocks Marble Auctions is the oldest and largest continuously running marble auctioneer. With the Block's Marble Auctions app, you can preview, watch and bid in our marble auctions from your mobile / tablet device. Participate in our sales while on- the-go and gain access to the following features: •Quick Registration •Following upcoming lots of interest •Push notifications to ensure you engage on items of interest •Track bidding history and activity •Watch live auctions

About

Koso App

Features
Read full description

The Koso Med mobile app gives authorized Koso Med members convenient access to their back-office information anytime, anywhere. Stay connected to your Koso Med business and access important information directly from your mobile device. Whether you are at home, traveling, or attending an event, the Koso Med app makes it easy to access important business information wherever you go. A valid Koso Med member account is required to access the app. Available features and information may vary depending on account status, eligibility, country, or region.

Screenshots

Block’s Marble Auctions4 screens
Koso App4 screens

Verdict

The call

The clearest difference is update cadence: Koso App at every 9 days against Block’s Marble Auctions's every 11 months. Block’s Marble Auctions's advantage is iOS requirement (12.0 vs 15.1). On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Block’s Marble Auctions ships an update every 11 months, Koso App every 9 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 7 level
Block’s Marble Auctions versus Koso App: the parameters behind the verdict, then further details
ParameterBlock’s Marble AuctionsKoso App
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 11 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better15.1
Further details — not scored
Size55 MB34 MB
Age rating17+17+
DeveloperBidsquareKoso med

In-app purchases

None

Block’s Marble Auctions

No in-app purchases

None

Koso App

No in-app purchases

Questions

Is Block’s Marble Auctions free?
Block’s Marble Auctions is free to download, with no in-app purchases.
Is Koso App free?
Koso App is free to download, with no in-app purchases.
Do Block’s Marble Auctions or Koso App have ads?
Neither Block’s Marble Auctions nor Koso App shows ads.
Which is updated more often, Block’s Marble Auctions or Koso App?
Block’s Marble Auctions ships an update every 11 months, and Koso App every 9 days. Most recently, Block’s Marble Auctions was updated on October 30, 2026 and Koso App on October 25, 2026.

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