Generate random, often nonsensical, ideas to spark creativity. This unofficial client provides daily inspiration on the go.
Useless Ideas by 俊 林





247+ iOS apps & games curated and reviewed
Out of 247+ useless app knowledge on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | 3.0★ (1) | No | No | May 2026 | |
| 2 | Free | 4.7★ (448K) | No | No | Aug 2026 | |
| 3 | Free | 4.4★ (29) | No | Yes | Aug 2026 | |
| 4 | Free | 5.0★ (2) | No | No | May 2026 | |
| 5 | Free | — | No | No | Aug 2026 | |
| 6 | Free | 4.8★ (18) | Yes | Yes | Aug 2026 | |
| 7 | Free | 4.5★ (71) | No | Yes | Aug 2026 | |
| 8 | Free | 4.1★ (414) | No | No | Aug 2026 |





Generate random, often nonsensical, ideas to spark creativity. This unofficial client provides daily inspiration on the go.






This platform allows users to ask questions on any topic and receive insightful answers from a global community. Discover personalized content, follow subjects of interest, and share your own expertise to contribute to a vast repository of knowledge.






Learn about history, science, philosophy, and more in just 10 minutes a day. This app offers short, engaging lessons with quizzes to test your knowledge and track your progress. It's designed for quick learning and better retention.


Organize your thoughts and information with a personal knowledge base. Save web pages, highlight text, and sync across devices. Create questions and link answers to build a comprehensive understanding of any topic.




Learn something new daily with short, engaging videos covering diverse topics. Boost your general knowledge in just 5 minutes a day with interactive quizzes and a rewarding system. Perfect for busy lifestyles, this app makes continuous learning enjoyable and effortless.


This app makes learning an adventure with an AI-powered tutor that adapts to your learning style. It uses vibrant visuals and interactive conversations to make complex topics engaging and easy to understand, covering a wide range of subjects.


Access over 150,000 step-by-step guides on virtually any topic. Learn new skills through articles, photos, illustrations, and videos. Includes a Survival Kit for offline emergency preparedness.


This app offers science-backed brain training games designed to combat cognitive decline caused by excessive screen time. It targets memory, attention, focus, and processing speed to restore mental sharpness and clarity.


Learn new and exciting things daily with a vast collection of verified facts. Get detailed explanations, listen to audio recordings, and share your favorite trivia. Make learning a daily habit and impress your friends with your knowledge.


Learn practical skills and get hands-on help with DIY projects from experienced individuals in your community. Share your own knowledge and connect with neighbors through shared learning experiences.


Discover over 10,500 fascinating facts on a wide range of topics. Easily navigate through new information by shaking your device, swiping, or tapping. Unlock premium content and an ad-free experience with an optional subscription.




Connect with others through video calls and messaging, building reputation based on shared expertise. Earn or pay for time spent discussing specific subjects, creating a network of knowledgeable contacts for efficient learning.


Generate thousands of cultural trivia questions for a card game. Daily new questions are added to keep gameplay fresh. The app also provides game instructions and technical support.


Discover a vast collection of over 2,100 intriguing and often amusing facts across 18 diverse categories. Learn about everything from internet passwords to medical terms and historical trivia. Save your favorite facts for easy access.






This app serves as a pocket clinical companion for nursing students and professionals. It offers quick access to essential drug information, diagnoses, lab values, and clinical skills. Features include audio heart and lung sounds, EKG practice, and study tools like quizzes and flashcards.


Test your brain with over 2,500 trivia questions covering a wide range of useless facts. Challenge your knowledge and see how much obscure information you can recall.