# Decoder vs Concordia

The clearest difference is price: Decoder at Free against Concordia's $9.99. Decoder also leads on in-app purchases (none vs 7) and iOS requirement (7.0 vs 15.0). Concordia's advantage is review sentiment (45% vs 0%) and rating (3.5 vs 1.2). On ads and device support there is nothing between them.

Decoder is free to download; Concordia costs $9.99 up front. Concordia sells 7 one-off in-app purchases. Decoder asks for nothing beyond the download.

Concordia holds the better App Store score, 3.5 against 1.2. That said, the two scores are not equally well evidenced: Concordia has 89 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 0% of Decoder's written reviews are positive against 45% of Concordia's.

Decoder ships an update every 7 months, Concordia monthly. The most recent releases landed on October 3, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Decoder | Concordia |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | [1.2 (5 ratings)](https://appshunter.io/ios/app/decoder/id294816947/reviews) | **[3.5 (89 ratings)](https://appshunter.io/ios/app/concordia-digital-edition/id1536417255/reviews)** |
| Number of ratings | 5 | **89** |
| Positive reviews | 0.0% of reviews | **44.8% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#133** |
| Size | 1 MB | 453 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Edwin Hou](https://appshunter.io/developer/292240393) | [Acram Digital](https://appshunter.io/developer/1536417257) |

## What reviewers say

### Decoder

[App page](https://appshunter.io/ios/app/decoder/id294816947)

This app assists players in solving the Mastermind logic game. It helps narrow down possible solutions by analyzing your guesses and their scores. Continue inputting your game progress until only one solution remains.

**Highlights:** Mastermind game solver, Input guesses and scores, Reduces possible solutions, Guides to single solution

**Features:** macOS Compatibility

**In-app purchases:** none


### Concordia

[App page](https://appshunter.io/ios/app/concordia-digital-edition/id1536417255)

**Currently charting:** #133 Top Paid · Board (US App Store)

Become a powerful Roman merchant in this turn-based strategy game. Build a trade empire, expand your reach across ancient maps, and make crucial decisions to outmaneuver opponents. Offers deep strategic gameplay with infinite replayability through expansions.

**Highlights:** Build trade empire, Trade goods and expand cities, Manage colonists and action cards, Play on various maps, Customize with expansions, Play against AI or friends, Cross-platform multiplayer

**Features:** Family Sharing, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gallia & Corsica | Free | one-time |
| Britannia & Germania | $2.99 | one-time |
| Aegyptus & Creta | $2.99 | one-time |
| Venus | $5.99 | one-time |
| Fish Market | $5.99 | one-time |
| Salsa | $8.99 | one-time |
| Season Pass | $16.99 | one-time |


## Frequently asked questions

### Is Decoder free?

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

### Is Concordia free?

Concordia costs $9.99, and also offers in-app purchases.

### Which has better reviews, Decoder or Concordia?

Concordia is rated higher. Decoder averages 1.2 out of 5 from 5 ratings, while Concordia averages 3.5 from 89 ratings.

### Do Decoder or Concordia have ads?

Neither Decoder nor Concordia shows ads.

### Which is updated more often, Decoder or Concordia?

Decoder ships an update every 7 months, and Concordia monthly. Most recently, Decoder was updated on October 3, 2026 and Concordia on October 11, 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.*