Comparison

Kotodama Diary vs Nerve Challenges

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

Head to head
About

Kotodama Diary

Nurture unique virtual pets whose evolution is determined by the words you choose. Decorate their rooms, dress them in accessories, and discover over 100 bizarre species. A relaxing game for those who enjoy collecting and quirky characters.

Highlights
  • Word-based pet evolution
  • Collect over 100 species
  • Room decoration
  • Accessory customization
  • Gacha system for items
  • Relaxing gameplay
Features
Read full description

"Are you looking for a cute pet? Too bad! Kotadama Diary's characters evolve depending on the words which you feed them, and could even grow up into something... unexpected. Weird characters, happy characters, sad characters, lovely characters, rude characters, and even, yes, simply cute characters—There's something for everyone! Can you feed them the right words to make them evolve into a new species? Try your best while you decorate your room with your favorite furniture. And you don't even need to clean up! Kotodama Diary is a simple, entertaining game that lets you have fun with bizarre characters that evolve depending on your choices! There are more than 100 different species of these weird characters, known as the ""kotodummies"". And, maybe, you'll find that the words you chose tell you something about yourself... ●○ How to play ○● - Touch or swipe on the hearts to collect them - When you have enough hearts, words will appear - Choose one of the words - Depending on which word you chose, the kotodummy will evolve - Use gems or tickets to draw fortunes and get accessories - The kotodummies will wear the accessories you give them, and, if they like them, they'll give you useful items in return - The kotodummies will collect coins which you can use to buy furniture - Furniture helps you progress through the game faster Decorate your room, play with your favorite kotodummies, and create your very own Kotodama Diary! ●○●You'll like this game if●○● - You like slow-paced, relaxing games - You want to pass some time for free - You want more than just cutesy characters - You want to speak with your pets - You want some absurd screenshots to share - You like pixel art - You like rolling those sweet gachas - You love putting accessories on things/people/animals - You enjoy the occasional weird character - You could do with some giggles - You like bringin up virtual characters - You want to decorate your room - You like collecting things - You want some very unique ""pets"""

About

Nerve Challenges

Engage in a social app featuring fun, bold, and creative dares. Earn virtual tokens to unlock cosmetic upgrades and enhance your profile. Challenges are skill-based, focusing on entertainment and creativity without real money or prizes.

Highlights
  • Complete fun and creative dares
  • Earn virtual tokens
  • Unlock cosmetic upgrades
  • Build and customize your profile
  • Skill-based challenges
  • No real money involved
Features
Read full description

Nerve Challenges is a social challenge app where users complete fun, bold, and creative dares to earn virtual tokens, unlock cosmetic upgrades, and build their profile. There is no real money, no gambling, and no cash prizes. All tokens and rewards are purely virtual and used for in-app features like themes, and profile effects. Challenges are skilled based and designed for entertainment and creativity.

Screenshots

Kotodama Diary4 screens
Nerve Challenges4 screens

Verdict

The call

The clearest difference is ads: Nerve Challenges at none against Kotodama Diary's shown. Kotodama Diary's advantage is ratings volume (3.1K vs 3). On price, rating, update cadence 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. Kotodama Diary sells 46 one-off in-app purchases and Nerve Challenges sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Kotodama Diary against 5.0 for Nerve Challenges. That said, the two scores are not equally well evidenced: Kotodama Diary has 3.1K ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

Kotodama Diary ships an update every 9 days, Nerve Challenges every 5 days. The most recent releases landed on October 19, 2026 and October 2, 2026 respectively.

Scorecard2 real differences · 8 level
Kotodama Diary versus Nerve Challenges: the parameters behind the verdict, then further details
ParameterKotodama DiaryNerve Challenges
PriceFreeFree
Rating4.9 (3.1K ratings)5.0 (3 ratings) — better
Positive reviews88.1% of reviews—
Number of ratings3.1K — better3
Update frequencyEvery 9 daysEvery 5 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size626 MB47 MB
Age rating4+12+
DeveloperPolaris-xVincent Batts-Jaczynski

Customer experience

Kotodama Diary

All ratings3,099 ratings
Positive97.8%
Neutral1.2%
Negative1.0%
Written reviews337 reviews
Positive88.1%
Neutral5.3%
Negative6.5%

Nerve Challenges

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Kotodama Diary

Reported bugs

3 issues
  • Game crashes or freezes
  • Ads not loading or getting stuck
  • Restoration of in-app purchases not working

Requested features

5 requests
  • Ability to chat or interact with Kotodummies
  • More furniture and room customization options
  • Easier way to obtain new Kotodummies
  • Ability to save and restore progress across devices
  • Mini-games or additional activities

Nerve Challenges

Not enough reviews yet to summarise bugs or requests.

In-app purchases

46 purchases

Kotodama Diary

One-time46
  • Gem Cluster$0.99
  • Mega Value Box$1.99
  • Summer Fashion Discount Pack$1.99
Show 43 more
  • Event Ltd Mega Pack$1.99
  • Bronze Chinese New Year Pack$1.99
  • Dreamland Drowsy Set$1.99
  • Hole in the Wall Pack - Tall$1.99
  • Natural Black Pack$1.99
  • Powerful Power-Stone Pack$1.99
  • Valentine Patissiere Pack$1.99
  • Red Camelia Kotoshrine Pack$1.99
  • Ice Village Fishing Pack$1.99
  • Dress-up Pack$1.99
  • Twilit Alley dress-up Pack$1.99
  • Cupcake Pack$1.99
  • Natural Garden Fashion Pack$1.99
  • Gem Baggie$2.99
  • VALUE 30-day Daily Gem Pack$3.99
  • Pure White Pack$5.99
  • Deco Sticker Pack$5.99
  • Gal's Sunday Outfit Pack$5.99
  • Summer Festival Pack$5.99
  • Cyber Tech Pack$5.99
  • Noommy's Investigation Pack$5.99
  • Bakery Preparation Pack$5.99
  • KotodamanniversaryPack$5.99
  • Pupcasso's Breezy Atelier$5.99
  • Overworked Programmer Pack$5.99
  • Kotodama School Years Pack$5.99
  • Loapher's BIG COMFY pack$5.99
  • Snowy Camelia Kotoshrine Pack$5.99
  • Gem Bag$5.99
  • Dougho Box$5.99
  • Ad-free Box$5.99
  • Event Limited Mega Pack$5.99
  • Twilit Alley good-looking Pack$5.99
  • Friends of the Third Kind Pack$6.99
  • Luxurious Vampire Manor Pack$6.99
  • Kototreasure Balloon Pack$6.99
  • 【33%OFF!】Gem Big Bag$9.99
  • Gem Big Bag$14.99
  • Partylads Box$14.99
  • Valentine Sweet Heart Pack$17.99
  • Gem Chest$29.99
  • Crystal Dougho Pack$34.99
  • Gem Mountain$59.99
5 purchases

Nerve Challenges

One-time5
  • 100 Tokens$2.99
  • 250 Tokens$6.99
  • 500 Tokens$12.99
Show 2 more
  • 1000 Tokens$19.99
  • 2500 Tokens$39.99

Questions

Is Kotodama Diary free?
Kotodama Diary is free to download, with in-app purchases available.
Is Nerve Challenges free?
Nerve Challenges is free to download, with in-app purchases available.
Which has better reviews, Kotodama Diary or Nerve Challenges?
Nerve Challenges is rated higher. Kotodama Diary averages 4.9 out of 5 from 3.1K ratings, while Nerve Challenges averages 5.0 from 3 ratings.
Do Kotodama Diary or Nerve Challenges have ads?
Kotodama Diary shows ads; Nerve Challenges does not.
Which is updated more often, Kotodama Diary or Nerve Challenges?
Kotodama Diary ships an update every 9 days, and Nerve Challenges every 5 days. Most recently, Kotodama Diary was updated on October 19, 2026 and Nerve Challenges on October 2, 2026.

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