Comparison

LLM Master vs COSMOS

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

LLM Master

Features
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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

About

COSMOS

Explore a real-time 3D model of the solar system, accurately depicting planet positions based on orbital mechanics. Zoom in on celestial bodies, control time to view past or future sky events, and learn details about each planet. This app offers an ad-free, offline experience with a one-time purchase.

Highlights
  • Real-time planet and moon positions
  • Scrub through time for past/future views
  • Photo-realistic textures
  • Adjustable time scale
  • Free exploration with pinch and swipe
  • Detailed information on celestial bodies
Features
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COSMOS is a solar system you hold in your hand. This is not a decoration. Every planet sits exactly where it is right now, computed from real orbital mechanics. Where is Jupiter tonight? How are Saturn's rings tilted? Open the app — the answer is there. - REAL ORBITS Positions of all 8 planets and the Moon are computed from Keplerian orbital elements in real time. Scrub through time to see the sky 10 years from now — or the day you were born. - PHOTO-REAL TEXTURES Saturn's rings, Jupiter's Great Red Spot, sunspots and solar granulation — every texture is generated on your device and stays crisp as you zoom. - CONTROL TIME From one second = hours, to one second = years. Watch the Moon change phase and the planets trace their orbits with your own eyes. - EXPLORE FREELY Pinch and swipe from outside the solar system down to a planet's face. Tap any body for details. - DESIGNED WITH RESPECT - No ads, ever - No in-app purchases — one simple price - Works fully offline, on a plane or on a mountain - Collects zero personal data For curious kids asking "why?" For stargazers who want a quiet moment of awe. The real universe, in your pocket. LANGUAGES English, Japanese, Simplified Chinese, Korean, Spanish, French, German

Screenshots

LLM Master4 screens
COSMOS4 screens

Verdict

The call

The clearest difference is price: COSMOS at Free against LLM Master's $22.99. COSMOS also leads on in-app purchases (none vs 4). LLM Master's advantage is device support (4 vs 2). On update cadence, ads and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

COSMOS is free to download; LLM Master costs $22.99 up front. LLM Master sells 4 one-off in-app purchases. COSMOS asks for nothing beyond the download.

UpkeepUpdate frequency

LLM Master ships an update fortnightly, COSMOS every 2 weeks. Both last shipped on October 25, 2026.

Scorecard3 real differences · 6 level
LLM Master versus COSMOS: the parameters behind the verdict, then further details
ParameterLLM MasterCOSMOS
Price$22.99Free — better
Rating—5.0 (3 ratings) — better
Number of ratings—3 — better
Update frequencyFortnightlyEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Paid
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS15.015.0
Further details — not scored
Size6 MB4 MB
Age rating4+4+
DeveloperResonance Spaceyuudai tasaki

In-app purchases

4 purchases

LLM Master

One-time4
  • Code Deep DiveFree
  • Tutor Mini Pack$2.99
  • Tutor Standard Pack$5.99
Show 1 more
  • Tutor Power Pack$17.99
None

COSMOS

No in-app purchases

Questions

Is LLM Master free?
LLM Master costs $22.99, and also offers in-app purchases.
Is COSMOS free?
COSMOS is free to download, with no in-app purchases.
Do LLM Master or COSMOS have ads?
Neither LLM Master nor COSMOS shows ads.
Which is updated more often, LLM Master or COSMOS?
LLM Master ships an update fortnightly, and COSMOS every 2 weeks. Most recently, LLM Master was updated on October 25, 2026 and COSMOS on October 25, 2026.

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