Review · Simulation · PC
Tranquil Koi 鯉の池
Reviewed: 23 Jun 2026
PC
FroggySoggy · 2025
Ludograph rating
Growth (BDS)
17
Risk (RIS)
12
Daily limit
120min
Age guidance
–
Developmental benefits
| B1 | Cognitive | 0.30 | |
| B2 | Social-emotional | 0.00 | |
| B3 | Motor | 0.10 | |
Tranquil Koi offers a peaceful and creative outlet for players to design and nurture their own aquatic sanctuary. It fosters spatial awareness through pond decoration and encourages creativity in collecting and breeding diverse koi. The idle progression allows for a relaxing experience without demanding constant attention.
Design risks
| R1 | Compulsion-loop pressure | 0.27 | |
| R2 | Monetization | 0.00 | |
| R3 | Social risk | 0.00 | |
As an idle game, Tranquil Koi incorporates mechanics like variable rewards and infinite play, which can encourage prolonged engagement. While not featuring aggressive monetization or social risks, the core loop of collecting and unlocking rare items could lead to a desire for continuous play.
Content (not in risk score)
| R4.1 | Violence Level | 0.00 | |
| R4.2 | Sexual Content | 0.00 | |
| R4.3 | Language | 0.00 | |
| R4.4 | Substance References | 0.00 | |
| R4.5 | Fear / Horror | 0.00 | |
Content risk is displayed separately and does not affect the time recommendation.
Regulatory design checks · DSA — Assessed: meets criteria·GDPR-K — Assessed: meets criteria·ODDS — Assessed: meets criteria
- DSA:What Ludograph checks: whether the game's design gives minors the transparency the EU Digital Services Act expects: plain terms, honest defaults, and clear reporting routes.: Estimated from review data. No dark pattern or child-targeting concerns found.
- GDPR-K:What Ludograph checks: whether age assurance and consent flows are designed for under-16s, in the spirit of GDPR Article 8.: Estimated from review data. No privacy or child-targeting concerns found.
- ODDS:What Ludograph checks: whether paid random-reward drop rates are disclosed, as required in China, Japan and South Korea.: Estimated from review data. No paid random-reward mechanics found, so drop-rate disclosure requirements do not apply.
These reflect Ludograph's assessment of the game's design practices against each framework's criteria, not a legal compliance determination.