# Selkirk vs Back Mountain Auctions

The clearest difference is ads: Back Mountain Auctions at none against Selkirk's shown. Back Mountain Auctions also leads on update cadence (every 14 months vs every 37 months). Selkirk's advantage is iOS requirement (13.4 vs 16.0). On price, in-app purchases and device support there is nothing between them.

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

Selkirk ships an update every 37 months, Back Mountain Auctions every 14 months. The most recent releases landed on September 10, 2026 and June 22, 2026 respectively.

## The numbers

| Metric | Selkirk | Back Mountain Auctions |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (40 ratings)](https://appshunter.io/ios/app/back-mountain-auctions/id1591871085/reviews)** |
| Number of ratings | — | **40** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 37 months | **Every 14 months** |
| Monetization | — | Free |
| Size | 38 MB | 135 MB |
| Requires iOS | **13.4** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Ball & Claw, Inc.](https://appshunter.io/developer/1561013008) | [Back Mountain Auctions](https://appshunter.io/developer/1591871087) |

## What reviewers say

### Selkirk

[App page](https://appshunter.io/ios/app/selkirk/id1561013006)

**Features:** macOS Compatibility

**In-app purchases:** none


### Back Mountain Auctions

[App page](https://appshunter.io/ios/app/back-mountain-auctions/id1591871085)

Participate in live auctions from your mobile device. Preview upcoming items, track your bids, and receive push notifications for items you're following. Experts are available for coins, jewelry, antiques, and more.

**Highlights:** Preview upcoming auctions, Bid in live auctions, Track bidding history, Receive push notifications, Watch live auction streams, Quick registration

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Selkirk free?

Selkirk is free to download, with no in-app purchases.

### Is Back Mountain Auctions free?

Back Mountain Auctions is free to download, with no in-app purchases.

### Do Selkirk or Back Mountain Auctions have ads?

Selkirk shows ads; Back Mountain Auctions does not.

### Which is updated more often, Selkirk or Back Mountain Auctions?

Selkirk ships an update every 37 months, and Back Mountain Auctions every 14 months. Most recently, Selkirk was updated on September 10, 2026 and Back Mountain Auctions on June 22, 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.*