Explore and learn about the 17 United Nations' Sustainable Development Goals. Test your knowledge with quizzes and track your personal contributions towards these goals. Share your progress with friends and family to encourage wider engagement.






206+ iOS apps curated and reviewed
The best wcydo apps on iPhone average 4.6★ across 206+ titles — we've ranked them by what real users actually keep on their phones. Updated June 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free was $1.99 | — | No | No | May 2026 | ||
| 2 | Free | 4.9★ (198K) | Yes | Yes | Sep 2026 | ||
| 3 | Free | 4.8★ (275K) | Yes | No | Sep 2026 | ||
| 4 | Free | 4.5★ (48K) | No | Yes | Sep 2026 | ||
| 5 | Free | 4.7★ (527K) | No | Yes | Sep 2026 | ||
| 6 | Free | 4.3★ (303) | Yes | Yes | Sep 2026 | ||
| 7 | Free | 4.7★ (17K) | No | No | Sep 2026 | ||
| 8 | Free | 4.2★ (184) | Yes | No | Aug 2026 |






Explore and learn about the 17 United Nations' Sustainable Development Goals. Test your knowledge with quizzes and track your personal contributions towards these goals. Share your progress with friends and family to encourage wider engagement.






Discover, download, and listen to over 95 million audio titles including podcasts, audiobooks, and FM radio. Enjoy personalized recommendations, seamless cross-device syncing, and smart speaker integration for an enhanced listening experience.






This app generates a variety of sounds to help users sleep, relax, and focus. It masks distracting noises, soothes babies, and can even help with headaches and tinnitus. Enjoy over 50 looped sounds with advanced mixing and alarm features.