Comparison

Chaos Zero Nightmare vs DIGIMON UP

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

DIGIMON UP

Embark on a new adventure with Digimon in this mobile game. Train and evolve your digital monsters to become stronger. The game features in-app purchases to enhance gameplay and progression.

Highlights
  • New Digimon adventure game
  • Train and evolve digital monsters
  • Enhance gameplay with in-app purchases
  • Official Bandai Namco Entertainment title
Read full description

You can grow stronger with your Digimon again. A new Digimon app game is here! Bandai Namco Entertainment Inc. Website: https://bandainamcoent.co.jp/english/ By downloading or installing this app, you agree to the Bandai Namco Entertainment Terms of Service. Terms of Service: https://legal.bandainamcoent.co.jp/terms/ Privacy Policy: https://legal.bandainamcoent.co.jp/privacy/ Note: This game contains some items available for in-app purchase that can enhance gameplay and speed up your progress. In-app purchases can be disabled in your device settings, see https://support.apple.com/en-us/HT201304 for more details. This application is distributed under the official rights from the license holder.

Screenshots

Chaos Zero Nightmare4 screens
DIGIMON UP4 screens

Verdict

The call

The clearest difference is review sentiment: Chaos Zero Nightmare at 66% against DIGIMON UP's 35%. Chaos Zero Nightmare also leads on rating (4.9 vs 4.4) and chart position (#50 vs #185). DIGIMON UP's advantage is update cadence (every 6 days vs every 3 weeks). On price, ratings volume, 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 10 one-off in-app purchases and DIGIMON UP sells 10 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 4.4. Both are backed by a comparable volume of ratings — 16K and 9.8K respectively. Written reviews point the same way: 66% of Chaos Zero Nightmare's written reviews are positive against 35% of DIGIMON UP's.

UpkeepUpdate frequency

Chaos Zero Nightmare ships an update every 3 weeks, DIGIMON UP every 6 days. Both last shipped on November 3, 2026.

Scorecard4 real differences · 7 level
Chaos Zero Nightmare versus DIGIMON UP: the parameters behind the verdict, then further details
ParameterChaos Zero NightmareDIGIMON UP
PriceFreeFree
Rating4.9 (16K ratings) — better4.4 (9.8K ratings)
Positive reviews66.3% of reviews — better34.5% of reviews
Number of ratings16K — better9.8K
Update frequencyEvery 3 weeksEvery 6 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#50 — better#185
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size113 MB254 MB
Age rating12+4+
DeveloperSmilegate, Inc.Bandai Namco Entertainment Inc.

Customer experience

Chaos Zero Nightmare

All ratings15,219 ratings
Positive97.2%
Neutral0.7%
Negative2.0%
Written reviews969 reviews
Positive66.3%
Neutral8.2%
Negative25.6%

DIGIMON UP

All ratings9,715 ratings
Positive85.5%
Neutral4.0%
Negative10.5%
Written reviews704 reviews
Positive34.5%
Neutral12.5%
Negative53.0%

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

DIGIMON UP

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Chaos Zero Nightmare

One-time10
  • Coronomicon Monthly Package$4.99
  • Tactical Asset Monthly Supply$4.99
  • Nightmare Carnival Chest I$14.99
Show 7 more
  • Crystal ×980$14.99
  • Golden Glow Beneath the Night Sky$29.99
  • Crystal ×1980$29.99
  • Royal Level Up Package$29.99
  • Crystal ×3280$49.99
  • Nightmare Carnival Chest II$49.99
  • Crystal ×6480$99.99
10 purchases

DIGIMON UP

One-time10
  • DigiDiamond A$0.99
  • Sale! DigiEmer. + Gatomon PJs$0.99
  • Sale! DigiEmer. + Agumon PJs$2.99
Show 7 more
  • DigiDiamond Pass$5.99
  • Prem. Plan Digital Boost Pass$5.99
  • DigiDiamond B$5.99
  • Ad Skip Pass$8.99
  • DigiDiamond C$14.99
  • DigiDiamond D$32.99
  • DigiDiamond E$64.99

Questions

Is Chaos Zero Nightmare free?
Chaos Zero Nightmare is free to download, with in-app purchases available.
Is DIGIMON UP free?
DIGIMON UP is free to download, with in-app purchases available.
Which has better reviews, Chaos Zero Nightmare or DIGIMON UP?
Chaos Zero Nightmare is rated higher. Chaos Zero Nightmare averages 4.9 out of 5 from 16K ratings, while DIGIMON UP averages 4.4 from 9.8K ratings.
Do Chaos Zero Nightmare or DIGIMON UP have ads?
Both Chaos Zero Nightmare and DIGIMON UP show ads.
Which is updated more often, Chaos Zero Nightmare or DIGIMON UP?
Chaos Zero Nightmare ships an update every 3 weeks, and DIGIMON UP every 6 days. Most recently, Chaos Zero Nightmare was updated on November 3, 2026 and DIGIMON UP on November 3, 2026.
Which is more popular, Chaos Zero Nightmare or DIGIMON UP?
Chaos Zero Nightmare currently peaks at #50 in the App Store charts, and DIGIMON UP at #185. Chart position reflects recent download velocity rather than total install base.

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