# Sotheby's vs Stamp Mate Mobile

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.

Both are free to download. Stamp Mate Mobile sells 1 one-off in-app purchase. Sotheby's asks for nothing beyond the download.

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.

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.

## The numbers

| Metric | Sotheby's | Stamp Mate Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (95 ratings)](https://appshunter.io/ios/app/sothebys/id1061156465/reviews)** | [3.0 (5 ratings)](https://appshunter.io/ios/app/stamp-mate-mobile/id1477076768/reviews) |
| Number of ratings | **95** | 5 |
| Positive reviews | 24.3% of reviews | **33.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Ad-supported | **Free** |
| Size | 53 MB | 47 MB |
| Requires iOS | 17.4 | **11.0** |
| Devices | iPhone, iPad, Apple TV | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Sothebys](https://appshunter.io/developer/393122746) | [Tomaz Langerholc](https://appshunter.io/developer/1477076767) |

## What reviewers say

### Sotheby's

[App page](https://appshunter.io/ios/app/sothebys/id1061156465)

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

**In-app purchases:** none

**What reviewers like**

- ✨ Beautiful photography and content
- 👍 Easy to navigate (for some)
- ✅ Great for browsing and viewing auctions
- 🤩 Interactive and engaging
- 🖼️ Elegant design

**What reviewers complain about**

- ❌ Core functionality missing
- 📉 Poor user experience
- 🚫 App is useless for many
- 😵 Confusing new format
- 📱 Not compatible with older phones

**Reported bugs**

- Cannot sort auction lots
- Cannot follow, view, or bid
- App crashes on launch
- ID verification camera not focusing
- Photo upload issues

**Requested features**

- Allow sorting of auction lots
- Improve search functionality
- Enable calendar integration
- Make app landscape compatible
- Simplify personalization options


### Stamp Mate Mobile

[App page](https://appshunter.io/ios/app/stamp-mate-mobile/id1477076768)

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:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Purchase the App | $8.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*