Comparison

Mysterious Creatures vs Yahhoo

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

Head to head
About

Mysterious Creatures

Engage in a unique seek-and-find experience by sifting through virtual shirasu to discover hidden sea creatures. Collect a variety of miniature marine life, from baby shrimp to tiny squid, and build your personal collection of these elusive finds.

Highlights
  • Sift through virtual shirasu
  • Discover hidden sea creatures
  • Collect miniature marine life
  • Build a personal collection
  • Hint system for assistance
  • Save game progress
Features
Read full description

Find the mysterious sea creatures lurking in the shirasu! What's shirasu, you ask? Shirasu, also known as whitebait in English, are the small young of fish like sardines and anchovies. They are very small and are used as a garnish or topping in many Japanese dishes, most commonly found as a simple topping for rice. Shirasu are caught in large batches and have an opalescent white color and resemble super tiny fish! They are cooked and salted lightly after being caught. Their close culinary cousin are chirimen, which are baby sardines that have been fully dried. Shirasu, on the other hand, are only partially dried, and have a softer consistency. They're a delicious and simple way to spice up a plain bowl of rice and an everyday part of cuisine in Japan. But... there's more to them than meets the eye! Because the small fish are caught in large batches, occasionally another miniature deepsea creature gets mixed into the shirasu. They're harmless, but you can sometimes find a mini squid, baby shrimp, or tiny fish in the mix! Of course, some are more rare than others, but this kind of seek-and-find suspense has caught on big with children and adults alike. Think of it as the deep-sea version of breakfast cereal... This game simulates the experience of sifting through the shirasu to find mysterious little beasts. See if you can collect them all! How to Play - Using your fingers, sift through the shirasu and look for mysterious creatures. Tap one to add it to your collection. - Pressing the pause button at top right will allow you to look through your collection. - Pressing the Twitter button will allow you to tweet the number of samples you've caught of the selected specimen. - Pressing the magnifying glass at top left will display a hint. Hints are replenished after 10 minutes. - The game is saved each time the pause button is pressed. ※The creatures in the game have been stylized for uniformity, so their color and shape may differ from the real thing.

About

Yahhoo

Experience a unique social game focused on peaceful interactions and making friends through a special magical language. Discover warmth and connection not found in other games.

Highlights
  • Social gameplay
  • Peaceful interactions
  • Friendship building
  • Unique magical language
  • Warm and comforting experience
Features
Read full description

[About this game] This game aims at you of tiredness feeling little peacefulness in a social game or a continuous-hits game. Impression which begins from やっほ- with an unknown animal. Please experience the warmth which is not in other games. [Game explanation] やっほ -... It is the language of magic. Even if コトバ does not lead and a feeling is not known It can become friends if there is やっほ -. Even if it falls and is sufficient for a feeling and the belly hurts It can become fine if there is やっほ -. It was good to be born to Japanese people! There was やっほ - and it was good!! Thank you! やっほ - This game is a game which can realize importance of such やっほ -. Now, you will also download right now and will begin a comfortable やっほ-life!

Screenshots

Mysterious Creatures4 screens
Yahhoo3 screens

Verdict

The call

The clearest difference is review sentiment: Yahhoo at 84% against Mysterious Creatures's 0%. Yahhoo also leads on rating (5.0 vs 3.4) and ads (none vs shown). On price, ratings volume, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Yahhoo holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews point the same way: 0% of Mysterious Creatures's written reviews are positive against 84% of Yahhoo's.

UpkeepUpdate frequency

Mysterious Creatures ships an update every 4 months, Yahhoo every 5 weeks. The most recent releases landed on October 4, 2026 and October 6, 2026 respectively.

Scorecard6 real differences · 4 level
Mysterious Creatures versus Yahhoo: the parameters behind the verdict, then further details
ParameterMysterious CreaturesYahhoo
PriceFreeFree
Rating3.4 (5 ratings)5.0 (2 ratings) — better
Positive reviews0.0% of reviews83.6% of reviews — better
Number of ratings5 — better2
Update frequencyEvery 4 monthsEvery 5 weeks — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.07.0 — better
Further details — not scored
Size13 MB39 MB
Age rating4+4+
DeveloperMasakazu YoneharaOMOSHIRO KAKUMEI CAPSULE PLUS, K.K.

Customer experience

Mysterious Creatures

All ratings5 ratings
Positive40.0%
Neutral40.0%
Negative20.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

Yahhoo

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews55 reviews
Positive83.6%
Neutral0.0%
Negative16.4%

In-app purchases

None

Mysterious Creatures

No in-app purchases

None

Yahhoo

No in-app purchases

Questions

Is Mysterious Creatures free?
Mysterious Creatures is free to download, with no in-app purchases.
Is Yahhoo free?
Yahhoo is free to download, with no in-app purchases.
Which has better reviews, Mysterious Creatures or Yahhoo?
Yahhoo is rated higher. Mysterious Creatures averages 3.4 out of 5 from 5 ratings, while Yahhoo averages 5.0 from 2 ratings.
Do Mysterious Creatures or Yahhoo have ads?
Mysterious Creatures shows ads; Yahhoo does not.
Which is updated more often, Mysterious Creatures or Yahhoo?
Mysterious Creatures ships an update every 4 months, and Yahhoo every 5 weeks. Most recently, Mysterious Creatures was updated on October 4, 2026 and Yahhoo on October 6, 2026.

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