Comparison

Chaos Zero Nightmare vs Endless Grades

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Chaos Zero Nightmare

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
Read full description

Zero Out All Despair Smilegate's new title, "Chaos Zero Nightmare," is now open! Board the SS Nightmare now! Chaos. A cosmic disaster that struck without warning. "Chaos," a black fog that consumes planets, distorting their environment and lifeforms. The beginning, or the end, of every story. [The Blue Pot], a Chaos located on Earth, the birthplace of humanity. There have been reports of unidentifiable creatures being discovered. And for some reason, a strange phenomenon that couldn't—no, shouldn't—be happening to the Captain is occurring. ▶ A World Drenched in Darkness, A Story Etched in Memory Dive into a vast and haunting dark fantasy narrative! Crushing stress, collapsing agents... and yet, the mission continues. Break through the encroaching crisis and immerse yourself in a brutally vivid dark fantasy experience. ▶ A New Kind of RPG, Rewritten with Every Choice Aim through the agents' eyes and feel the weight of combat at your fingertips! Unique cards, branching choices, and evolving "Save Data" shaped by your journey through the Chaos. Every run is unique. Build your own strategy and master the ever-changing battlefield. ▶ Characters That Dazzle the Eyes and Steal the Heart Gorgeous 2D illustrations and striking animations make every moment a visual delight! Fully voiced by top-tier voice actors, each scene draws you deeper into the story. Join a cast of unforgettable characters in battle and beyond, and cherish every moment of your journey together! ※ How to Manage Permissions After allowing access to permissions, you can reset or turn off them as follows. - Device Settings > Privacy & Security > Select the App > Allow or Don't Allow Permissions ⁜⁜Stay up to date with the latest news on Chaos Zero Nightmare! ⁜⁜ Brand Page: https://chaoszeronightmare.onstove.com/ Official Community: https://page.onstove.com/chaoszeronightmare/en Official YouTube: https://www.youtube.com/@ChaosZeroNightmare_EN Official X: https://x.com/CZN_Official_EN

About

Endless Grades

Immerse yourself in a retro pixel RPG with a modern growth system and epic soundtracks. Collect hundreds of heroes, forge equipment, and enjoy strategic progression without tedious grinding. Compete in PvP and guild battles for generous rewards.

Highlights
  • Premium audiovisual experience with legendary composers
  • Retro pixel art with modern growth system
  • Hundreds of heroes to command
  • Deep strategy with Pets, Spirits, and Felispirits
  • No grinding required, shared hero levels
  • Generous rewards and idle accumulation
  • PvP battles and guild challenges
Features
Read full description

◈ A Premium Audiovisual Experience with Legendary Composers Featuring music by renowned Japanese game composers Motoi Sakuraba and Noriyuki Iwadare. Their masterful soundtracks create a deeply immersive RPG journey that resonates long after you play. ◈ Where Retro Pixel Charm Meets Modern Power Growth A high-quality RPG blending classic pixel art with a modern explosive growth system. Command hundreds of heroes in a beautifully crafted pixel world and experience thrilling exponential progression. ◈ Deep and Diverse Strategy Progression Enjoy multiple growth systems including Pets, Spirits, and Felispirits. Forge legendary equipment, challenge bosses for powerful Relics, and combine Heroes, Relics, and Spirits to form your own strategy. ◈ Relax and Enjoy -- No Grinding Required No more tedious grinding. All heroes share levels and equipment, so newly summoned characters are battle-ready instantly. Grow stronger naturally and enjoy a relaxing adventure. ◈ Generous Rewards & True Idle Fun Guaranteed SSR in every 10-pull, up to 2,000 free summons. Free summons and resources are plentiful, and even offline your Gems and shards keep accumulating. ◈ Ultimate Showdowns Await Challenge powerful bosses and engage in PvP battles. Compete in the Arena with players worldwide. Join a guild to defeat strong enemies together and earn valuable rewards. ◈ Your Adventure Starts Now Retro pixel nostalgia, epic music, and satisfying progression await. Claim your beginner rewards and begin your legendary journey now.

Screenshots

Chaos Zero Nightmare4 screens
Endless Grades4 screens

Verdict

The call

The clearest difference is review sentiment: Chaos Zero Nightmare at 66% against Endless Grades's 27%. Chaos Zero Nightmare also leads on rating (4.9 vs 4.7) and chart position (#165 vs unranked). Endless Grades's advantage is iOS requirement (13.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Chaos Zero Nightmare sells 45 one-off in-app purchases and Endless Grades sells 12 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Chaos Zero Nightmare holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 15K and 3.4K respectively. Written reviews point the same way: 66% of Chaos Zero Nightmare's written reviews are positive against 27% of Endless Grades's.

UpkeepUpdate frequency

Chaos Zero Nightmare ships an update every 3 weeks, Endless Grades fortnightly. Both last shipped on September 25, 2026.

Scorecard5 real differences · 6 level
Chaos Zero Nightmare versus Endless Grades: the parameters behind the verdict, then further details
ParameterChaos Zero NightmareEndless Grades
PriceFreeFree
Rating4.9 (15K ratings) — better4.7 (3.4K ratings)
Positive reviews66.2% of reviews — better26.6% of reviews
Number of ratings15K — better3.4K
Update frequencyEvery 3 weeksFortnightly — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#165 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size112 MB1.3 GB
Age rating12+12+
DeveloperSmilegate, Inc.LIGHTCORE GAMES LIMITED

Customer experience

Chaos Zero Nightmare

All ratings14,802 ratings
Positive97.2%
Neutral0.7%
Negative2.0%
Written reviews948 reviews
Positive66.2%
Neutral8.0%
Negative25.7%

Endless Grades

All ratings3,441 ratings
Positive93.8%
Neutral1.9%
Negative4.4%
Written reviews395 reviews
Positive26.6%
Neutral6.8%
Negative66.6%

User reviews

Chaos Zero Nightmare

From 15K App Store ratings

What we love

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

Room to improve

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

Endless Grades

From 3.4K App Store ratings

What we love

  • ⭐ Nice game
  • ⭐ High SSR drop rate
  • ⭐ Appealing characters

Room to improve

  • 🚫 Misleading ads
  • 🚫 Auto-idle gameplay
  • 🚫 Pay-to-progress
  • 🚫 Tons of ads
  • 🚫 Pay-to-win

Bugs and requests

Chaos Zero Nightmare

Reported bugs

2 issues
  • Banned IP Issues
  • Missing Files and Inability to Load

Requested features

3 requests
  • English Dubbed Version
  • More Male Characters
  • Flexible Character Setup

Endless Grades

Reported bugs

1 issue
  • Can't play due to network issues

Requested features

2 requests
  • Disable dialog auto-next
  • Allow tap-to-proceed

In-app purchases

45 purchases

Chaos Zero Nightmare

One-time45
  • New Captain Support Kit I$0.99
  • New Captain Support Kit II$4.99
  • Coronomicon Monthly Package$4.99
Show 42 more
  • Half-Anniversary Ticket$4.99
  • Tactical Asset Monthly Supply$4.99
  • Agent Growth Kit$4.99
  • Aether Supply Kit$4.99
  • Gentle Ripples on the Night Sea$7.99
  • Crimson Yearning Within the Waves$7.99
  • Youth Under the Sun$7.99
  • Special Data7 variants$9.99
  • Partner Promotion Kit$9.99
  • Imp's Mischief I$14.99
  • Covert Exchange I$14.99
  • Scent of Summer I$14.99
  • Legacy of Will I$14.99
  • Galaxy Melody I$14.99
  • Emergency Rescue Operation II$14.99
  • Crystal ×980$14.99
  • Regular Rescue Operation II$14.99
  • Golden Nebula Package I$14.99
  • SS Nightmare Security Upgrade I$14.99
  • Budding Seed of Karmic Fire I$14.99
  • Zero Data6 variants$19.99
  • Crystal ×1980$29.99
  • Royal Level Up Package$29.99
  • Golden Nebula Package II$29.99
  • Sweet Confession Gift$29.99
  • Galactic Disaster 3rd Supply Kit II$29.99
  • Emergency Rescue Operation III$29.99
  • Imp's Mischief II$49.99
  • Covert Exchange II$49.99
  • Scent of Summer II$49.99
  • Legacy of Will II$49.99
  • Galaxy Melody Ⅱ$49.99
  • SS Nightmare Security Upgrade II$49.99
  • Silver Winter Star Package I$49.99
  • Galactic Disaster Support Kit I$49.99
  • Large Scale Rescue Operation I$49.99
  • Imp's Mischief III$99.99
  • Covert Exchange Ⅲ$99.99
  • Scent of Summer III$99.99
  • Galaxy Melody Ⅲ$99.99
  • Crystal ×6480$99.99
  • Golden Nebula Package Ⅳ$99.99
12 purchases

Endless Grades

One-time12
  • STANDARD PACK_1$0.99
  • STANDARD PACK_2$1.99
  • STANDARD PACK_3$2.99
Show 9 more
  • STANDARD PACK_4$4.99
  • STANDARD PACK_5$6.99
  • STANDARD PACK_6$9.99
  • STANDARD PACK_7$14.99
  • STANDARD PACK_8$19.99
  • STANDARD PACK_9$24.99
  • STANDARD PACK_10$29.99
  • STANDARD PACK_11$49.99
  • STANDARD PACK_13$99.99

Questions

Is Chaos Zero Nightmare free?
Chaos Zero Nightmare is free to download, with in-app purchases available.
Is Endless Grades free?
Endless Grades is free to download, with in-app purchases available.
Which has better reviews, Chaos Zero Nightmare or Endless Grades?
Chaos Zero Nightmare is rated higher. Chaos Zero Nightmare averages 4.9 out of 5 from 15K ratings, while Endless Grades averages 4.7 from 3.4K ratings.
Do Chaos Zero Nightmare or Endless Grades have ads?
Both Chaos Zero Nightmare and Endless Grades show ads.
Which is updated more often, Chaos Zero Nightmare or Endless Grades?
Chaos Zero Nightmare ships an update every 3 weeks, and Endless Grades fortnightly. Most recently, Chaos Zero Nightmare was updated on September 25, 2026 and Endless Grades on September 25, 2026.

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