AI & Machine Learning Tutor vs Litter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AI & Machine Learning Tutor
Master AI and Machine Learning with a comprehensive learning hub. Access over 600 quizzes, detailed explanations, cheat sheets, and interview preparation materials. Chat with an AI tutor to get quizzed and corrected for certifications.
- Over 600 quizzes on AI/ML topics
- Detailed answers and references
- AI and ML cheat sheets
- Interview preparation materials
- Chat with AI tutor
- Progress tracking and scoring
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AI & ML Tutor is the offline study app for professionals getting certified in artificial intelligence and machine learning and staying employable while the field moves. 41 certifications and 2,153 practice questions. The first 30 of every certification, 1,008 in all, are free. One in-app purchase unlocks the rest and all 18 interactive labs. WHAT'S INSIDE AWS (11 tracks) AWS Certified Machine Learning Specialty, AI Practitioner, Machine Learning Engineer Associate, Generative AI Developer Professional, Data Engineer Associate, Advanced Networking Specialty, plus focused sets on data engineering, exploratory data analysis, modeling, and implementation and operations. Google Cloud (3 tracks) Professional Machine Learning Engineer, Generative AI Leader, and GCP ML implementation and operations. Microsoft Azure (2 tracks) Azure AI Fundamentals and Azure AI Apps and Agents Developer. NVIDIA and Databricks (8 tracks) NCA-GENL, NCA-AIIO, NCA-GENM, NCP-GENL, NCP-AIOL, NCP-AII, NCP-AIN, and the Databricks Generative AI Engineer Associate. Claude, OpenAI and agents (5 tracks) Claude Certified Associate, Developer, Architect Foundations and Architect Professional, plus an OpenAI API & Agents skills bank. MLOps and foundations (12 tracks) MLOps and AIOps across all three clouds, plus machine learning, deep learning, neural networks, NLP, generative AI and explainable AI. INTERACTIVE LABS Most study apps show you a diagram. These let you move it. Sweep an input through ReLU, sigmoid and tanh and watch the dying-ReLU flat zone appear. Step a ball down a loss curve, then push the learning rate past 1.0 and watch it diverge. Drag a query point across a k-NN decision boundary and see the vote flip. Tap "it" in a sentence and watch self-attention land on "laptop". Shrink an autoencoder bottleneck until the reconstruction blurs. Turn retrieval off in a RAG pipeline and watch a confident, wrong answer appear. Eighteen labs in total. All of them run on your device with no connection. BUILT FOR HOW PEOPLE ACTUALLY STUDY - Five-minute sessions. Choose 5, 10 or 15 questions instead of grinding through a 152-question bank you'll never finish in one sitting. - Every option explained. Most apps tell you the right answer. This one explains all of them, so a wrong guess still teaches you something. - A review queue that adapts. Missed questions come back automatically and leave once you've got them right. - Progress you can see. Daily streak, best score per certification, questions answered, and how many are still waiting for review. - Works on a plane. Every question ships inside the app. MORE THAN A QUESTION BANK The Briefing tab keeps you current between study sessions: AI Daily News, the DjamgaMind podcast playable on your lock screen, and live job listings. The Practice tab carries 16 tutorials, 10 of them full step-by-step walkthroughs you read inside the app, covering Amazon Bedrock, Azure AI Foundry, Vertex AI, prompt engineering and RAG, and the coding agents professionals use daily. NATIVE, PRIVATE AND QUIET Siri Shortcuts let you say "Practice offline" to start a session. Daily study reminders are scheduled locally by iOS. Dark mode is supported throughout. Your quiz history, streak and review queue are stored on your device and never uploaded. There is no account to create, no analytics SDK and no advertising SDK in the app. Want the full question banks and all 18 labs? AI & ML Tutor PRO is our separate paid app. Questions, or a certification you'd like added? https://machinelearningcertification.web.app
Litter
Engage with environmental topics through interactive articles and mini-games focused on waste management and recycling. Compete with friends and others on leaderboards while tracking your progress and building a community dedicated to a cleaner planet.
- Environmental articles and resources
- Interactive quizzes and sorting games
- Global and friend leaderboards
- Social connection and progress tracking
- Waste management and recycling focus
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Learn about waste management, recycling, and environmental responsibility through engaging resources and fun mini-games. Features: * Learn: Explore articles and resources on important environmental topics. * Play: Test your knowledge with quizzes, challenge your sorting skills with Connections, or try the fast-paced Catcher game. * Compete: Climb the global and friends leaderboards by earning points in games. * Connect: Find and add friends, see their progress, and build a community focused on a cleaner planet. * Track: Monitor your score, view your profile, and see your recent game activity. Join the Litter-acy community and turn learning about waste into a fun, competitive experience! Download now and start making a difference.
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Verdict
The clearest difference is review sentiment: Litter at 100% against AI & Machine Learning Tutor's 50%. Litter also leads on update cadence (daily vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
AI & Machine Learning Tutor ships an update every 2 months, Litter daily. The most recent releases landed on October 21, 2026 and October 7, 2026 respectively.
| Parameter | AI & Machine Learning Tutor | Litter |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (7 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 7 — better |
| Update frequency | Every 2 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.2 |
| Further details — not scored | ||
| Size | 5 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | DjamgaTech Corp | Justin Chung |
Customer experience
AI & Machine Learning Tutor
Litter
In-app purchases
AI & Machine Learning Tutor
No in-app purchases
Litter
No in-app purchases
Questions
Is AI & Machine Learning Tutor free?
Is Litter free?
Do AI & Machine Learning Tutor or Litter have ads?
Which is updated more often, AI & Machine Learning Tutor or Litter?
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