# Deck Builder for Union Arena vs OP Vault

The clearest difference is in-app purchases: OP Vault at none against Deck Builder for Union Arena's 2. Deck Builder for Union Arena's advantage is update cadence (weekly vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Deck Builder for Union Arena sells 2 in-app purchases, starting at $4.99 per month. OP Vault asks for nothing beyond the download.

Deck Builder for Union Arena ships an update weekly, OP Vault every 5 weeks. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Deck Builder for Union Arena | OP Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (44 ratings)](https://appshunter.io/ios/app/deck-builder-for-union-arena/id6563139619/reviews)** | — |
| Number of ratings | **44** | — |
| Positive reviews | 63.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 5 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 80 MB | 131 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Nicholas Martin Geil](https://appshunter.io/developer/1757209176) | [YAPAJU CORP](https://appshunter.io/developer/1896416558) |

## What reviewers say

### Deck Builder for Union Arena

[App page](https://appshunter.io/ios/app/deck-builder-for-union-arena/id6563139619)

This fan-made companion app helps you build, manage, and share decks for the Union Arena TCG. It features a comprehensive card database, TCGPlayer value integration, and the ability to buy cards directly within the app.

**Highlights:** Extensive card database, Deck building and management, Card scanning for collection, Community deck sharing, TCGPlayer value integration, Offline collection access

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Union Arena Pro | $4.99 | per month |
| Remove All Ads | $4.99 | one-time |


### OP Vault

[App page](https://appshunter.io/ios/app/op-vault/id6767189072)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Deck Builder for Union Arena free?

Deck Builder for Union Arena is free to download, with in-app purchases available.

### Is OP Vault free?

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

### Do Deck Builder for Union Arena or OP Vault have ads?

Both Deck Builder for Union Arena and OP Vault show ads.

### Which is updated more often, Deck Builder for Union Arena or OP Vault?

Deck Builder for Union Arena ships an update weekly, and OP Vault every 5 weeks. Most recently, Deck Builder for Union Arena was updated on October 16, 2026 and OP Vault on October 8, 2026.

---

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