Comparison

World for Two 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

World for Two

In a post-apocalyptic world where all life has perished, a lone scientist and a newly created android embark on a journey to recreate life. Explore a desolate yet beautiful landscape while gathering energy and discovering the secrets of this new beginning.

Highlights
  • Post-apocalyptic setting
  • Life creation gameplay
  • Exploration of a desolate world
  • Story-driven narrative
  • Unique character duo
Features
Read full description

ある日、突然の大災害によってありとあらゆる生物が死に絶えた。 それから幾年、荒廃した世界で唯一の生き残りの博士は地下にある研究所で生物を創ろうとしていた。 博士は生物を創るのに欠かせないエネルギーを採取する為、外で活動が可能なアンドロイドを創り出した。 人間の文明活動がとまった世界は植物が生い茂る。 残酷であるが美しくもある。 そんな世界で博士とアンドロイド、二人の生命創りが始まった。 滅びゆく世界に生命を創る物語

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!" You awaken to find a strange but cute creature growing from your arm. It turns out to be a terrible parasite that will drain all of its host's vitality. Do you kill it, or let it kill you? Introducing the world's first parasite-purging adventure game. ++Your Immune Response is Key++ Choose supplies that will improve your health so you can withstand the parasite! Uncover food combos that produce gastronomic reactions as you struggle to survive! ++Simple Controls++ No difficult motions required. ++Multiple Endings++ Your actions will alter the story. ++Completely Free++ Fully playable without spending any money. ++Other++ No story connections to previous games (though there is a shared worldview). Some endings are good, others are bad.

Screenshots

World for Two4 screens
Parasite Days4 screens

Verdict

The call

The clearest difference is rating: Parasite Days at 5.0 against World for Two's 4.4. Parasite Days also leads on review sentiment (98% vs 82%) and ratings volume (218 vs 25). World for Two's advantage is ads (none vs shown) and update cadence (every 5 days vs fortnightly). On price, in-app purchases, monetization model 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. World for Two sells 3 one-off in-app purchases and Parasite Days sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Parasite Days holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Parasite Days has 218 ratings behind it against 25, so its average is the more settled of the two. Written reviews point the same way: 82% of World for Two's written reviews are positive against 98% of Parasite Days's.

UpkeepUpdate frequency

World for Two ships an update every 5 days, Parasite Days fortnightly. The most recent releases landed on September 23, 2026 and September 25, 2026 respectively.

Scorecard6 real differences · 4 level
World for Two versus Parasite Days: the parameters behind the verdict, then further details
ParameterWorld for TwoParasite Days
PriceFreeFree
Rating4.4 (25 ratings)5.0 (218 ratings) — better
Positive reviews82.1% of reviews97.9% of reviews — better
Number of ratings25218 — better
Update frequencyEvery 5 days — betterFortnightly
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better13.0
Further details — not scored
Size108 MB126 MB
Age rating4+12+
DeveloperSeventh rank Inc.zxima.LLC

Customer experience

World for Two

All ratings25 ratings
Positive88.0%
Neutral4.0%
Negative8.0%
Written reviews95 reviews
Positive82.1%
Neutral10.5%
Negative7.4%

Parasite Days

All ratings218 ratings
Positive99.1%
Neutral0.9%
Negative0.0%
Written reviews48 reviews
Positive97.9%
Neutral2.1%
Negative0.0%

In-app purchases

3 purchases

World for Two

One-time3
  • 支援1$2.99
  • 支援2$4.99
  • 支援3$5.99
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 World for Two free?
World for Two is free to download, with in-app purchases available.
Is Parasite Days free?
Parasite Days is free to download, with in-app purchases available.
Which has better reviews, World for Two or Parasite Days?
Parasite Days is rated higher. World for Two averages 4.4 out of 5 from 25 ratings, while Parasite Days averages 5.0 from 218 ratings.
Do World for Two or Parasite Days have ads?
Parasite Days shows ads; World for Two does not.
Which is updated more often, World for Two or Parasite Days?
World for Two ships an update every 5 days, and Parasite Days fortnightly. Most recently, World for Two was updated on September 23, 2026 and Parasite Days on September 25, 2026.

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