Stretchy Natto vs 空想水族館
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Stretchy Natto
Experience the unique texture of fermented soybeans by stirring and stretching them as far as possible. This simple yet engaging game challenges your dexterity and offers a fun, quirky way to pass the time. Enjoy a satisfyingly stretchy sensation with easy-to-learn controls.
- Stir nattō for 5 seconds
- Stretch nattō upwards
- Simple, easy-to-learn gameplay
- Satisfying stretchy sensation
- Challenging dexterity
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Nattō (fermented soybeans) is an bizarre Japanese food that gets very stretchy as you stir. Challenge yourself in stretching it up as possible! It's so easy to play! Thanks to everyone, "Stretchy Natto" has surpassed 300,000 downloads to date! [ How to play ] 1. Stir the Nattō for 5 seconds! 2. Stretch the Nattō up!
空想水族館
Discover a futuristic aquarium filled with whimsical creatures. Collect unique animal hybrids through a free gacha system and uncover the aquarium's secrets in a fun, story-driven game. Enjoy simple, casual gameplay perfect for passing the time.
- Collect unique hybrid creatures
- Free gacha system
- Futuristic aquarium setting
- Story-driven gameplay
- Tilt sensor mechanics
- Casual time-killing game
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西暦20XX年、ありえないと思われていた水族館がついにオープン！？ おさかな町にある、不思議な生き物たちが暮らす未来の水族館。 普通の水族館とは違う、その秘密とは…？ いろいろな生き物と出会って空想水族館の秘密にせまろう！（漫画で進む面白ストーリー） 完全無料のガチャガチャを回して、可愛いく不思議な生きもの達を集めよう。 ほのぼの簡単な暇つぶし面白ゲームだよ。 うさぎ＋ペンギンの「うさぺん」、ハムスター＋あざらしの「ハムざらし」など様々なキャラクターが飛び出すよ。 端末の傾きセンサーに対応した様々な仕掛けもあるので、いろいろ試してね。おもちゃ感覚で遊べるよ。 ©はてなのたまご ライセンス：カミオジャパン、いたのくまんぼう アプリ提供：アーツプラネット 空想水族館 https://twitter.com/KUUSOU_official カミオジャパン https://twitter.com/kamiojapan いたのくまんぼう https://twitter.com/Ninebonz アーツプラネット https://twitter.com/Artsplanet_Inc
Screenshots
Verdict
The clearest difference is rating: 空想水族館 at 4.9 against Stretchy Natto's 2.9. 空想水族館 also leads on update cadence (every 2 months vs every 9 months) and review sentiment (100% vs 78%). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
空想水族館 holds the better App Store score, 4.9 against 2.9. Both are backed by a comparable volume of ratings — 9 and 8 respectively. Written reviews point the same way: 78% of Stretchy Natto's written reviews are positive against 100% of 空想水族館's.
Stretchy Natto ships an update every 9 months, 空想水族館 every 2 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | Stretchy Natto | 空想水族館 |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (9 ratings) | 4.9 (8 ratings) — better |
| Positive reviews | 78.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 9 — better | 8 |
| Update frequency | Every 9 months | Every 2 months — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 36 MB | 395 MB |
| Age rating | 4+ | 4+ |
| Developer | takuya ori | ArtsPlanet |
Customer experience
Stretchy Natto
空想水族館
In-app purchases
Stretchy Natto
No in-app purchases
空想水族館
No in-app purchases
