# StarSavior vs Chaos Zero Nightmare

The clearest difference is ads: StarSavior at none against Chaos Zero Nightmare's shown. Chaos Zero Nightmare's advantage is rating (4.9 vs 4.5) and ratings volume (15K vs 680). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. StarSavior sells 47 one-off in-app purchases and Chaos Zero Nightmare sells 45 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Chaos Zero Nightmare holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: Chaos Zero Nightmare has 15K ratings behind it against 680, so its average is the more settled of the two. Written reviews point the same way: 53% of StarSavior's written reviews are positive against 66% of Chaos Zero Nightmare's.

StarSavior ships an update fortnightly, Chaos Zero Nightmare every 3 weeks. The most recent releases landed on September 24, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | StarSavior | Chaos Zero Nightmare |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (680 ratings)](https://appshunter.io/ios/app/starsavior/id6443597557/reviews) | **[4.9 (15K ratings)](https://appshunter.io/ios/app/chaos-zero-nightmare/id6502326151/reviews)** |
| Number of ratings | 680 | **15K** |
| Positive reviews | 52.6% of reviews | **66.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#117** | #128 |
| Size | 439 MB | 112 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Studio B Side Co., Ltd](https://appshunter.io/developer/1309394369) | [Smilegate, Inc.](https://appshunter.io/developer/588277915) |

## What reviewers say

### StarSavior

[App page](https://appshunter.io/ios/app/starsavior/id6443597557)

**Currently charting:** #117 Top Grossing · Role Playing, #135 Top Grossing · Strategy (US App Store)

Embark on a cosmic journey as a Captain, leading star-powered girls in a turn-based RPG. Train your team, forge bonds, and uncover a new story to inherit the legacy of a legendary hero. Experience visually stunning battles and an anime-inspired world.

**Highlights:** Lead star-powered girls, Turn-based combat, Cinematic skill animations, Deep character bonds, New cosmic story, Anime-style illustrations, 3D graphics

**Features:** macOS Compatibility

**In-app purchases (47)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Welcome  Savior Observation Pack | $0.99 | one-time |
| Welcome  Featured Observation Pack | $0.99 | one-time |
| Launch  Arcana Observation Pack | $0.99 | one-time |
| Daily Infrastructure Pack | $0.99 | one-time |
| W.Liberator Observation Package I | $1.99 | one-time |
| Candle Sqaure Observation Pack I | $1.99 | one-time |
| May Bride Observation Package I | $1.99 | one-time |
| May Bride Featured Observ Pac I | $1.99 | one-time |
| Special Savior Level-Up Package | $1.99 | one-time |
| Monastir Featured Observation Pac I | $1.99 | one-time |
| Plus Level Up Package | $1.99 | one-time |
| CounterSide Featured Observe Pack I | $1.99 | one-time |
| Eastern Wind Observation Package I | $1.99 | one-time |
| Daily Aether Dust Pack | $1.99 | one-time |
| Plus Journey Package | $2.99 | one-time |
| Daily Starlight Essence Package | $3.99 | one-time |
| Daily Operation Report Package | $3.99 | one-time |
| Daily Gold Package | $3.99 | one-time |
| Daily Operation Report Support Pack | $3.99 | one-time |
| 30-Day Stellagem Supply | $4.99 | one-time |
| 30-Day Willpower Supply | $4.99 | one-time |
| Daily Starlight Essence Sup. Pack | $4.99 | one-time |
| House Stranis Observation Pack I | $5.99 | one-time |
| CounterSide Feature Observe Pack II | $5.99 | one-time |
| May Bride Observation Package II | $5.99 | one-time |
| Monastir Featured Observ Pac II | $5.99 | one-time |
| CounterSide Featured observe pac Ⅱ | $5.99 | one-time |
| Paradise Festival Step up Step 2 | $7.99 | one-time |
| Half-Anniv Step Up Pac STEP 2 | $7.99 | one-time |
| New Captain  Journey Support Pack | $7.99 | one-time |
| House Stranis Observation pack II | $9.99 | one-time |
| Candle Sqaure Observation Pack III | $9.99 | one-time |
| CounterSide Featured observe pac Ⅲ | $9.99 | one-time |
| Rabbit  Arcana Growth Boost Pack | $9.99 | one-time |
| Paradise Festival Step up Step 3 | $11.99 | one-time |
| Black Peal Trap Package | $11.99 | one-time |
| Veiled in Violet Package | $11.99 | one-time |
| Veiled Promise Package | $11.99 | one-time |
| Lisette's Super Package | $14.99 | one-time |
| Lisette First Buy Special Offer | $14.99 | one-time |
| New Captain  Savior Observe. Pack | $14.99 | one-time |
| House Stranis Observation pack III | $19.99 | one-time |
| Operation Breakthrough Pass Vol.1 | $19.99 | one-time |
| CounterSide Featured observe pac IV | $19.99 | one-time |
| Scarlet's Super Package | $21.99 | one-time |
| (First Purchase)Stellagem 1800+1800 | $29.99 | one-time |
| (First Purchase)Stellagem 4800+4800 | $79.99 | one-time |


### Chaos Zero Nightmare

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

**Currently charting:** #128 Top Grossing · Role Playing (US App Store)

Embark on a dark fantasy RPG adventure where your choices shape the narrative and gameplay. Battle cosmic horrors with unique cards and evolving strategies. Experience a visually stunning world with fully voiced characters.

**Highlights:** Dark fantasy narrative, Choice-driven RPG mechanics, Unique card-based combat, Evolving gameplay with branching choices, Gorgeous 2D illustrations, Fully voiced characters

**Features:** macOS Compatibility

**In-app purchases (45)**

| Purchase | Price | Billing |
| --- | --- | --- |
| New Captain Support Kit I | $0.99 | one-time |
| New Captain Support Kit II | $4.99 | one-time |
| Coronomicon Monthly Package | $4.99 | one-time |
| Half-Anniversary Ticket | $4.99 | one-time |
| Tactical Asset Monthly Supply | $4.99 | one-time |
| Agent Growth Kit | $4.99 | one-time |
| Aether Supply Kit | $4.99 | one-time |
| Gentle Ripples on the Night Sea | $7.99 | one-time |
| Crimson Yearning Within the Waves | $7.99 | one-time |
| Youth Under the Sun | $7.99 | one-time |
| Special Data | $9.99 | one-time |
| Partner Promotion Kit | $9.99 | one-time |
| Imp's Mischief I | $14.99 | one-time |
| Covert Exchange I | $14.99 | one-time |
| Scent of Summer I | $14.99 | one-time |
| Legacy of Will I | $14.99 | one-time |
| Galaxy Melody I | $14.99 | one-time |
| Emergency Rescue Operation II | $14.99 | one-time |
| Crystal ×980 | $14.99 | one-time |
| Regular Rescue Operation II | $14.99 | one-time |
| Golden Nebula Package I | $14.99 | one-time |
| SS Nightmare Security Upgrade I | $14.99 | one-time |
| Budding Seed of Karmic Fire I | $14.99 | one-time |
| Zero Data | $19.99 | one-time |
| Crystal ×1980 | $29.99 | one-time |
| Royal Level Up Package | $29.99 | one-time |
| Golden Nebula Package II | $29.99 | one-time |
| Sweet Confession Gift | $29.99 | one-time |
| Galactic Disaster 3rd Supply Kit II | $29.99 | one-time |
| Emergency Rescue Operation III | $29.99 | one-time |
| Imp's Mischief II | $49.99 | one-time |
| Covert Exchange II | $49.99 | one-time |
| Scent of Summer II | $49.99 | one-time |
| Legacy of Will II | $49.99 | one-time |
| Galaxy Melody Ⅱ | $49.99 | one-time |
| SS Nightmare Security Upgrade II | $49.99 | one-time |
| Silver Winter Star Package I | $49.99 | one-time |
| Galactic Disaster Support Kit I | $49.99 | one-time |
| Large Scale Rescue Operation I | $49.99 | one-time |
| Imp's Mischief III | $99.99 | one-time |
| Covert Exchange Ⅲ | $99.99 | one-time |
| Scent of Summer III | $99.99 | one-time |
| Galaxy Melody Ⅲ | $99.99 | one-time |
| Crystal ×6480 | $99.99 | one-time |
| Golden Nebula Package Ⅳ | $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


## Frequently asked questions

### Is StarSavior free?

StarSavior is free to download, with in-app purchases available.

### Is Chaos Zero Nightmare free?

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

### Which has better reviews, StarSavior or Chaos Zero Nightmare?

Chaos Zero Nightmare is rated higher. StarSavior averages 4.5 out of 5 from 680 ratings, while Chaos Zero Nightmare averages 4.9 from 15K ratings.

### Do StarSavior or Chaos Zero Nightmare have ads?

Chaos Zero Nightmare shows ads; StarSavior does not.

### Which is updated more often, StarSavior or Chaos Zero Nightmare?

StarSavior ships an update fortnightly, and Chaos Zero Nightmare every 3 weeks. Most recently, StarSavior was updated on September 24, 2026 and Chaos Zero Nightmare on September 25, 2026.

### Which is more popular, StarSavior or Chaos Zero Nightmare?

StarSavior currently peaks at #117 in the App Store charts, and Chaos Zero Nightmare at #128. Chart position reflects recent download velocity rather than total install base.

---

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