# LLM Master — Master LLM Agent Engineering

> Master LLM Agent Engineering (iPhone/iPad app by Resonance Space.)

- Source: https://appshunter.io/ios/app/llm-master/id6769785318 (this page in markdown: same URL + `.md`)
- Developer: [Resonance Space](https://appshunter.io/developer/1582458978)
- Category: Education
- Price: $22.99 with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 6 MB
- Languages: English
- Released: 2026-06-01
- Data updated: 2026-08-03
- User reviews in markdown: https://appshunter.io/ios/app/llm-master/id6769785318/reviews.md

## What is LLM Master?

Master LLM Agent engineering from zero to production engineer level.

•112 lessons · ~1.5M characters in-depth content
  Onboarding → LLM Foundation → Agent Engineering → RAG → Production → Frameworks → ERP/ABAP applied → Advanced → Extended tracks (Python, FastAPI, LangGraph, Vector DB, MCP, Multimodal, Deployment, hands-on projects).

•Zero-hallucination principle
  Every factual claim is backed by verified official documentation, listed as sources. No speculation, no unverified info.

•AI Tutor (Claude-powered)
  1:1 Q&A grounded in lesson context. Drag any passage in the body and ask about that specific part — auto-quoted in the question.

•Learning tools
  • 5-question applied quizzes (not rote memorization — application/judgment/scenarios)
  • Bookmarks across lessons with unified view
  • Font size & Korean TTS (Web Speech API)
  • Home-screen Quick Actions (resume / bookmarks / AI tutor)

•For
  LLM Agent / AI Engineer interview prep, ML engineer transitioners, AI product developers, RAG/Agent system builders.

•Topics
  Prompt Engineering, Tool Use, Structured Outputs, Context Windows, ReAct, Reflexion, Planning, Memory, MCP, RAG (Chunking, Advanced patterns, Eval, Vector DB internals), Eval, Guardrails, Observability, Cost Optimization, Prompt Injection, Multi-agent Orchestration, Long-context, Sandboxed Code Execution, LangChain/LangGraph, AutoGen, CrewAI, LlamaIndex, MCP Server, Computer Use, ABAP/SAP, Fine-tuning vs RAG, Distillation/Quantization, Eval Datasets, Multi-tenant, Python/FastAPI, pgvector/Qdrant/Pinecone, Vision, Speech (STT/TTS/Realtime), Image Generation, 2026 Frontier.

•Payment
  A one-time app purchase ($29.99) unlocks 112 lessons, 112 quizzes, bookmarks, Quick Actions, TTS, and all future content updates — forever. The Anthropic Claude-powered AI tutor includes 10 free messages every month; top up via consumable packs (Mini 200 messages · 60 days / Standard 500 messages · 90 days / Power 1,500 messages · 180 days). No subscription, no auto-renewal.

Privacy policy: https://www.resonance-space.net/llmstudy-privacy-en.html

## Pricing and in-app purchases

Base price: $22.99.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Code Deep Dive | Free | one-time |
| Tutor Standard Pack | $5.99 | one-time |
| Tutor Mini Pack | $2.99 | one-time |
| Tutor Power Pack | $17.99 | one-time |



## Version history (last 3 releases)

### 1.2.0 — 2026-07-06

This update makes your learning experience more reliable.

• Your best quiz score is now always kept when retaking a quiz
• Fixed the Chinese language setting not being saved
• Fixed the Restore Purchases button sometimes not appearing
• Clearer messages when the AI tutor runs into an error
• Added a retry option when a lesson fails to load
• Improved purchase reliability and overall performance

### 1.1 — 2026-06-02

Stabilization Enhancement

### 1.0 — 2026-06-01

No release notes.

## More apps by Resonance Space

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- [Camper Muse](https://appshunter.io/ios/app/camper-muse/id6761327451)
- [MealMania](https://appshunter.io/ios/app/mealmania/id6762081857)
- [MusePhoto](https://appshunter.io/ios/app/musephoto/id6767789605)

All apps by Resonance Space: https://appshunter.io/developer/1582458978

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-03.*