Comparison

BecameKappa vs Parasite Days

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

Head to head
About

BecameKappa

A casual raising simulation game where you nurture a creature by feeding it and helping it grow. Discover multiple endings and enjoy a story that changes on subsequent playthroughs. Perfect for quick gaming sessions.

Highlights
  • Nurture and raise a monster
  • Feed cucumbers to help growth
  • Discover 4 different endings
  • Story changes on second playthrough
  • Casual gameplay for spare time
  • Mutations based on index
Features
Read full description

=== A Heart-Stirring Raising Game === From the team behind “Raise a Japanese Doll”, comes a brand-new series. ■ Description ■ This is a game where you raise me! Feed me cucumbers and help me grow fast. There are 4 different endings (with more to come in future updates). A casual game you can enjoy in your spare time. ■ Recommended Points ■ -Evolve quickly and smoothly -Enjoy multiple endings -On the second playthrough and beyond, the story changes ■ Hints ■ [About Mutations] I mutate based on my mutation index. [About Cucumbers (Food)] -They regenerate every 5 minutes -If you’re impatient, taking care of me helps them grow faster -Sometimes, cucumbers arrive from Mom (Mamazon)

About

Parasite Days

Awaken with a strange creature on your arm in this unique adventure game. Decide whether to fight the parasite or succumb to its draining effects. Manage your health, discover food combos, and make choices that lead to multiple endings.

Highlights
  • Parasite-purging adventure
  • Health management
  • Food combo discovery
  • Simple controls
  • Multiple endings
  • Choice-driven narrative
Features
Read full description

"Good morning, Hostbody!" In a not-so-distant future, the world is dying. You wake up to find a strange but cute creature growing from your arm. It is a parasite — one that drains its host's vitality. Do you purge it... or will it purge you first? The world's first parasite-raising survival adventure. ■ Features [1] Supply management is your lifeline Each day, choose supplies (food, items, medicine) to keep your immune system strong. Survive the sudden "absorption seizures" with smart decisions. [2] Food combos trigger chemical reactions Mix and match supplies to discover powerful effects. Experiment to find your own winning combinations. [3] Your choices change everything Multiple endings based on how you treat the parasite and the people of a dying world. Happy endings, bad endings — find the one that's yours. [4] Charming pixel art and a bittersweet world Retro pixel art paired with an atmospheric soundtrack. Cute, lonely, and a little heartbreaking — everyday life at the end of the world. [5] Simple controls anyone can enjoy No difficult action required. Tap-only mini-games with no stamina or timers. Play at your own pace. ■ Great for players who love - Pixel art / retro indie games - Dystopian sci-fi and post-apocalyptic stories - Story-driven games with multiple endings - Relaxed simulation and management gameplay ■ Notes - Fully playable to the end for free (ads are shown). - No story connection to previous titles. - Includes both happy and bad endings. Cute, terrifying, and a little heartbreaking. Step into the story of a limbless parasite and its Hostbody in a dying world.

Screenshots

BecameKappa4 screens
Parasite Days4 screens

Verdict

The call

The clearest difference is in-app purchases: BecameKappa at none against Parasite Days's 4. BecameKappa also leads on iOS requirement (12.0 vs 15.0). Parasite Days's advantage is update cadence (fortnightly vs every 19 months) and rating (5.0 vs 4.7). On price, ads and device support 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. Parasite Days sells 4 one-off in-app purchases. BecameKappa asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Parasite Days holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Parasite Days has 229 ratings behind it against 34, so its average is the more settled of the two. Written reviews point the same way: 81% of BecameKappa's written reviews are positive against 94% of Parasite Days's.

UpkeepUpdate frequency

BecameKappa ships an update every 19 months, Parasite Days fortnightly. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

Scorecard7 real differences · 3 level
BecameKappa versus Parasite Days: the parameters behind the verdict, then further details
ParameterBecameKappaParasite Days
PriceFreeFree
Rating4.7 (34 ratings)5.0 (229 ratings) — better
Positive reviews81.0% of reviews94.4% of reviews — better
Number of ratings34229 — better
Update frequencyEvery 19 monthsFortnightly — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size78 MB141 MB
Age rating12+12+
DeveloperOMOSHIRO KAKUMEI CAPSULE PLUS, K.K.zxima.LLC

Customer experience

BecameKappa

All ratings34 ratings
Positive94.1%
Neutral2.9%
Negative2.9%
Written reviews63 reviews
Positive81.0%
Neutral3.2%
Negative15.9%

Parasite Days

All ratings224 ratings
Positive99.1%
Neutral0.9%
Negative0.0%
Written reviews89 reviews
Positive94.4%
Neutral2.2%
Negative3.4%

Bugs and requests

BecameKappa

Not enough reviews yet to summarise bugs or requests.

Parasite Days

Reported bugs

7 issues
  • Cannot submit robot in mini-game, leading to evaluation of E
  • Completed robot displayed on normal screen after bug
  • Cannot submit robot in cooperation menu, leading to it being stuck in 'prohibited' state
  • Bug where the robot is stuck on screen after the cooperation menu issue
  • Cannot obtain 'Dropped too much!' flag even after dropping supplies multiple times
Show 2 more
  • Ad loading errors preventing gameplay
  • Some flags are unobtainable

Requested features

9 requests
  • More endings
  • New characters
  • Russian language translation
  • Add more dialogue for milestones (e.g., day 50, 100)
  • New game + or more content to extend gameplay
Show 4 more
  • Ability to add glasses to the parasite (already exists but some users want it more prominently)
  • More hints for unlocking endings/flags
  • New endings where you are the parasite
  • More gameplay outside of the foundation

In-app purchases

None

BecameKappa

No in-app purchases

4 purchases

Parasite Days

One-time4
  • Laser Threader$0.99
  • Life Enforcer$0.99
  • Rewarded Ads Off$1.99
Show 1 more
  • Donate$2.99

Questions

Is BecameKappa free?
BecameKappa is free to download, with no in-app purchases.
Is Parasite Days free?
Parasite Days is free to download, with in-app purchases available.
Which has better reviews, BecameKappa or Parasite Days?
Parasite Days is rated higher. BecameKappa averages 4.7 out of 5 from 34 ratings, while Parasite Days averages 5.0 from 229 ratings.
Do BecameKappa or Parasite Days have ads?
Both BecameKappa and Parasite Days show ads.
Which is updated more often, BecameKappa or Parasite Days?
BecameKappa ships an update every 19 months, and Parasite Days fortnightly. Most recently, BecameKappa was updated on November 2, 2026 and Parasite Days on November 7, 2026.

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