Comparison

Sotheby's vs Stamp Mate Mobile

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

Head to head
About

Sotheby's

Access extraordinary art, precious objects, wine, and jewelry from auctions worldwide. Track bids, register for auctions, and explore past and upcoming sales with expert insights.

Highlights
  • Bid in live and online auctions
  • Track bids and registrations
  • Browse open, upcoming, and past auctions
  • Search past and present lots
  • Manage profile and view purchases
  • Access favorite auctions and lots
Read full description

Extraordinary auctions. Exceptional finds. Anytime, anywhere. The Sotheby’s iOS app provides collectors with exceptional access to the world’s most extraordinary art, precious objects, wine and jewellery, together with the unparalleled expertise of our world-class specialists. Track your bids and registrations effortlessly. Bid in live and online auctions. Browse open, upcoming, and past auctions. Browse fixed price retail items in search results. Quickly access your favorite auctions and lots. Search past and present lots. Manage profile, view purchases, and customize your settings.

About

Stamp Mate Mobile

Manage your stamp collection with an advanced, user-friendly interface. Features automatic import, inventory management, and online auction search. Easily track your stamps, wishlists, and sales.

Highlights
  • Automatic stamp import via Colnect API
  • Synchronize data across multiple devices
  • Manual stamp entry and scanning
  • Track personal stamp information (album, price, value)
  • Manage stamp inventory and quantities
  • Record purchases, sales, and swaps
  • Online auction search (eBay, Delcampe, HipStamp)
Features
Read full description

Meet the Stamp Mate - the advanced stamp collecting app Stamp Mate is an advanced collecting manager for managing your own stamp collection, wishlist, selling lists, etc. Its main advantages are user friendly interface and automatic import (thanks to Colnect API) that will save you a lot of time you would normally spend for manually entering the information. Managing large amount of stamps has never been so easy. FEATURES Adding stamps automatically Search by country, keywords or issued year and get a list of properties for each stamp (image, name, country, series, year of issue, etc.). Over 1.100,000 stamps from 1171 countries available. Synchronize your data between multiple devices Synchronizing data with cloud allows you to transfer data between desktop and mobile devices. Import from Colnect Account If you already have account on Colnect you can simply import all the information. Add stamps manually If you have stamps that autosearch cannot find, you can scan them and add them manually. Add personal stamp information Store a lot of »personal« information, such as Album, Location, Quantity, Price, Est. Values, etc. Add status to a stamp Tag your stamps with Have, Wish, Trade and Sell status by simple click on status button or customize your own status list. Managing Quantities Simply manage your stamp inventory. You can store multiple quantities and values by condition. Purchases and Sales / Swapping Store all your purchases and sales for each stamp. You can also store your swapping information. Online search Search online auctions (eBay, Delcampe and HipStamp). Advanced Sort Sort your lists any way you want. Filtering Simply filter data by Status, Country, Series, Issued Year, Keywords, Group, etc.

Screenshots

Sotheby's4 screens
Stamp Mate Mobile4 screens

Verdict

The call

The clearest difference is in-app purchases: Sotheby's at none against Stamp Mate Mobile's 1. Sotheby's also leads on rating (3.4 vs 3.0) and update cadence (every 2 weeks vs every 2 months). Stamp Mate Mobile's advantage is ads (none vs shown) and review sentiment (33% vs 24%). On price 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. Stamp Mate Mobile sells 1 one-off in-app purchase. Sotheby's asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sotheby's holds the better App Store score, 3.4 against 3.0. That said, the two scores are not equally well evidenced: Sotheby's has 95 ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 24% of Sotheby's's written reviews are positive against 33% of Stamp Mate Mobile's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Sotheby's ships an update every 2 weeks, Stamp Mate Mobile every 2 months. The most recent releases landed on September 25, 2026 and June 1, 2026 respectively.

Scorecard8 real differences · 2 level
Sotheby's versus Stamp Mate Mobile: the parameters behind the verdict, then further details
ParameterSotheby'sStamp Mate Mobile
PriceFreeFree
Rating3.4 (95 ratings) — better3.0 (5 ratings)
Positive reviews24.3% of reviews33.3% of reviews — better
Number of ratings95 — better5
Update frequencyEvery 2 weeks — betterEvery 2 months
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, Apple TViPhone, iPad, iPod
Requires iOS17.411.0 — better
Further details — not scored
Size53 MB47 MB
Age rating12+4+
DeveloperSothebysTomaz Langerholc

Customer experience

Sotheby's

All ratings95 ratings
Positive60.0%
Neutral3.2%
Negative36.8%
Written reviews74 reviews
Positive24.3%
Neutral2.7%
Negative73.0%

Stamp Mate Mobile

All ratings5 ratings
Positive40.0%
Neutral0.0%
Negative60.0%
Written reviews6 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

Bugs and requests

Sotheby's

Reported bugs

10 issues
  • Cannot sort auction lots
  • Cannot follow, view, or bid
  • App crashes on launch
  • ID verification camera not focusing
  • Photo upload issues
Show 5 more
  • Saved objects not displaying correctly
  • App freezes or crashes during use
  • Lot details never load
  • AppleTV app fails to open
  • App thinks it's on an iPhone on iPad

Requested features

8 requests
  • Allow sorting of auction lots
  • Improve search functionality
  • Enable calendar integration
  • Make app landscape compatible
  • Simplify personalization options
Show 3 more
  • Improve account integration
  • Allow file uploads for ID verification
  • Fix AppleTV app issues

Stamp Mate Mobile

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Sotheby's

No in-app purchases

1 purchases

Stamp Mate Mobile

One-time1
  • Purchase the App$8.99

Questions

Is Sotheby's free?
Sotheby's is free to download, with no in-app purchases.
Is Stamp Mate Mobile free?
Stamp Mate Mobile is free to download, with in-app purchases available.
Which has better reviews, Sotheby's or Stamp Mate Mobile?
Sotheby's is rated higher. Sotheby's averages 3.4 out of 5 from 95 ratings, while Stamp Mate Mobile averages 3.0 from 5 ratings.
Do Sotheby's or Stamp Mate Mobile have ads?
Sotheby's shows ads; Stamp Mate Mobile does not.
Which is updated more often, Sotheby's or Stamp Mate Mobile?
Sotheby's ships an update every 2 weeks, and Stamp Mate Mobile every 2 months. Most recently, Sotheby's was updated on September 25, 2026 and Stamp Mate Mobile on June 1, 2026.

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