Review · Family · iOS
0-Null-Zero
Reviewed: 28 Jun 2026
iOS
Gerhard Lentschik · 2018
Ludograph rating
Growth (BDS)
43
Risk (RIS)
6
Daily limit
120min
Age guidance
10+
Developmental benefits
| B1 | Cognitive | 0.72 | |
| B2 | Social-emotional | 0.03 | |
| B3 | Motor | 0.30 | |
0-Null-Zero is a logic-based puzzle game that strongly engages cognitive skills such as problem-solving, spatial awareness, strategic thinking, and critical thinking. Its 102 levels provide a consistent and adaptive challenge, fostering learning transfer in logical reasoning. The tactile interaction with tiles also provides moderate hand-eye coordination and fine motor skill development.
Design risks
| R1 | Compulsion-loop pressure | 0.03 | |
| R2 | Monetization | 0.00 | |
| R3 | Social risk | 0.17 | |
The game presents minimal risks. While a global leaderboard introduces a slight element of social comparison and potential competitive toxicity, these are not core manipulative design mechanics. There are no monetization pressures, compulsion-loop design, or concerning content risks.
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.