空想水族館 vs Koinobore
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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
Koinobore
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Perfect for Children's Day! In Japan, families celebrate Children's Day on May 5 by flying koinobori, colorful carp streamers, with the wish that their children grow up strong. The streamers are linked to an old legend: a carp that swims all the way up a waterfall becomes a dragon. In this game, parents and children can play through that legend together. ■ A picture-book story On Children's Day, the littlest red koinobori flies off from a family's garden. It climbs a waterfall, rises above the clouds, reaches the night sky, and finally becomes a dragon. Full-screen illustrations tell the story, and you can skip it anytime. ■ Easy to play Tap to swim up. Swipe to dodge. That's it! ■ Normal Mode and Kids Mode - Normal Mode: dodge the blockers and climb. A real challenge! - Kids Mode: falling is OK, so even little children can reach the dragon ending ■ Stages - Stage 1: Waterfall - Stage 2: Above the Clouds - Stage 3: Night Sky (clear it to see the dragon ending) - Endless Climb: how high can you go? ■ More to enjoy - Build combos for a high score - 8 looks for your koinobori - 24 Star Cards to collect ■ For parents - Ads appear only as a banner at the bottom of the title screen, and sometimes as a full-screen ad after tapping "Play again" on the results screen. No ads appear during play. - Tap "Pause" to pause the game at any time. - Game records are saved only on this device. Each play takes 30 seconds to 2 minutes. Perfect for families around Children's Day!
Screenshots
Verdict
The clearest difference is device support: 空想水族館 at 3 against Koinobore's 1. 空想水族館 also leads on iOS requirement (12.0 vs 17.0). On price, update cadence, 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 ships an update every 2 months, Koinobore every 5 weeks. The most recent releases landed on October 27, 2026 and October 15, 2026 respectively.
| Parameter | 空想水族館 | Koinobore |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (8 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 2 months | Every 5 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 395 MB | 96 MB |
| Age rating | 4+ | 4+ |
| Developer | ArtsPlanet | Kentaro Miura |
In-app purchases
空想水族館
No in-app purchases
Koinobore
No in-app purchases
