# Chaos Zero Nightmare vs メルクストーリア

The clearest difference is rating: Chaos Zero Nightmare at 4.9 against メルクストーリア's 4.2. Chaos Zero Nightmare also leads on ratings volume (16K vs 5) and chart position (#14 vs unranked). メルクストーリア's advantage is in-app purchases (none vs 10) and ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Chaos Zero Nightmare sells 10 one-off in-app purchases. メルクストーリア asks for nothing beyond the download.

Chaos Zero Nightmare holds the better App Store score, 4.9 against 4.2. That said, the two scores are not equally well evidenced: Chaos Zero Nightmare has 16K ratings behind it against 5, so its average is the more settled of the two. Written reviews complicate that: 66% of Chaos Zero Nightmare's written reviews are positive against 95% of メルクストーリア's, so the app with the better star average is not the one people write more warmly about.

Chaos Zero Nightmare ships an update every 3 weeks, メルクストーリア every 4 days. The most recent releases landed on November 12, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Chaos Zero Nightmare | メルクストーリア |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (16K ratings)](https://appshunter.io/ios/app/chaos-zero-nightmare/id6502326151/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/id6740187188/reviews) |
| Number of ratings | **16K** | 5 |
| Positive reviews | 66.5% of reviews | **95.2% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#14** | — |
| Size | 114 MB | 203 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Smilegate, Inc.](https://appshunter.io/developer/588277915) | [Happy Elements K.K](https://appshunter.io/developer/574733038) |

## What reviewers say

### Chaos Zero Nightmare

[App page](https://appshunter.io/ios/app/chaos-zero-nightmare/id6502326151)

**Currently charting:** #14 Top Grossing · Role Playing, #114 Top Grossing · Games (US App Store)

Embark on a dark fantasy RPG adventure where your choices shape the narrative and gameplay. Collect unique cards, develop strategies, and experience a visually stunning world with fully voiced characters. Every playthrough offers a distinct journey through a cosmic disaster.

**Highlights:** Dark fantasy narrative, Choice-driven RPG mechanics, Unique card collection, Evolving 'Save Data', Gorgeous 2D illustrations, Fully voiced characters, Branching story paths

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Crystal ×300 | $4.99 | one-time |
| Coronomicon Monthly Package | $4.99 | one-time |
| Tactical Asset Monthly Supply | $4.99 | one-time |
| Special Data | $9.99 | one-time |
| Crystal ×980 | $14.99 | one-time |
| Regular Rescue Operation II | $14.99 | one-time |
| Crystal ×1980 | $29.99 | one-time |
| Royal Level Up Package | $29.99 | one-time |
| Crystal ×3280 | $49.99 | one-time |
| Crystal ×6480 | $99.99 | one-time |

**What reviewers like**

- 🚀 Amazing, Incredible, Gorgeous, Uniquely Compelling
- 👍 Fun, Refreshing, Engaging Gameplay
- 💎 Solid Story, Animation, and Voice Acting
- 🎨 Beautiful Character Designs and Visuals

**What reviewers complain about**

- 🐛 Connection Issues, Login Problems, and Crashes
- 💰 Gacha Rates are Low, Grindy Progression
- ⏱️ Lengthy, Tedious, and Time-Consuming Runs

**Reported bugs**

- Banned IP Issues
- Missing Files and Inability to Load

**Requested features**

- English Dubbed Version
- More Male Characters
- Flexible Character Setup


### メルクストーリア

[App page](https://appshunter.io/ios/app/id6740187188)

Relive a heartwarming story that has touched players for 11 years. This memorial app features the main story, over 80 event stories, and a gallery of units, monsters, and illustrations. Discover new "after stories" for beloved characters.

**Highlights:** Main story archive, Over 80 event stories, Unit and monster data, Illustration gallery, New character "after stories"

**In-app purchases:** none


## Frequently asked questions

### Is Chaos Zero Nightmare free?

Chaos Zero Nightmare is free to download, with in-app purchases available.

### Is メルクストーリア free?

メルクストーリア is free to download, with no in-app purchases.

### Which has better reviews, Chaos Zero Nightmare or メルクストーリア?

Chaos Zero Nightmare is rated higher. Chaos Zero Nightmare averages 4.9 out of 5 from 16K ratings, while メルクストーリア averages 4.2 from 5 ratings.

### Do Chaos Zero Nightmare or メルクストーリア have ads?

Chaos Zero Nightmare shows ads; メルクストーリア does not.

### Which is updated more often, Chaos Zero Nightmare or メルクストーリア?

Chaos Zero Nightmare ships an update every 3 weeks, and メルクストーリア every 4 days. Most recently, Chaos Zero Nightmare was updated on November 12, 2026 and メルクストーリア on November 8, 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.*