# Unique Auctions vs Sikkaji

The clearest difference is update cadence: Sikkaji at monthly against Unique Auctions's every 24 months. On price, ads, in-app purchases and monetization model there is nothing between them.

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

Unique Auctions ships an update every 24 months, Sikkaji monthly. The most recent releases landed on October 7, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Unique Auctions | Sikkaji |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/unique-auctions/id1535153692/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Monthly** |
| Monetization | Free | Free |
| Size | 135 MB | 43 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Unique World Coin Sdn. Bhd](https://appshunter.io/developer/1535153694) | [Utsav Selarka](https://appshunter.io/developer/1750445805) |

## What reviewers say

### Unique Auctions

[App page](https://appshunter.io/ios/app/unique-auctions/id1535153692)

This app connects users with a numismatic auction company for professional evaluations, exhibitions, and auctions of coins and banknotes. It facilitates a global network of collectors and business partners.

**Highlights:** Professional numismatic evaluation, Exhibitions and auctions, Global collector network, Numismatic society memberships, Numismatic company subsidiary

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Sikkaji

[App page](https://appshunter.io/ios/app/sikkaji/id6503937442)

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.

**Highlights:** Buy and sell vintage coins/notes, Guest login for browsing, Explore by category, Search by name, Seller profile pages, Secure checkout

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Unique Auctions free?

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

### Is Sikkaji free?

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

### Do Unique Auctions or Sikkaji have ads?

Neither Unique Auctions nor Sikkaji shows ads.

### Which is updated more often, Unique Auctions or Sikkaji?

Unique Auctions ships an update every 24 months, and Sikkaji monthly. Most recently, Unique Auctions was updated on October 7, 2026 and Sikkaji on October 16, 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.*