7+ iOS apps & games curated and reviewed
The best nub theory apps and games on iPhone average 4.3★ across 7+ titles — we've ranked them by what real users actually keep on their phones. Updated July 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | Yes | Sep 2026 | |
| 2 |  | Free | 4.7★ (12) | No | Yes | Sep 2026 | |
| 3 |  | Free | 3.8★ (95) | No | Yes | Sep 2026 | |
| 4 |  | Free | 4.3★ (12) | No | Yes | Sep 2026 | |
| 5 |  | Free | — | No | Yes | Aug 2026 | |
| 6 |  | Free | 4.2★ (543) | Yes | Yes | Sep 2026 | |
| 7 |  | Free | 4.7★ (443) | No | No | Sep 2026 |
This app uses AI to analyze ultrasound images and playfully predict your baby's gender. It provides confidence scores, feedback on scan clarity, and a history log for keepsakes. Designed for entertainment, it's a fun way to explore pregnancy possibilities.
Predict your baby's gender using AI analysis of ultrasound photos based on Nub Theory. Upload an image, receive an instant prediction with a confidence score and detailed insights. Designed for expectant parents to share the excitement.