Cairn
A trail through Microsoft certifications

Place every stone.
Reach the summit.

Cairn is a focused study companion for 54 Microsoft exams — guided readings with analogies and diagrams, an adaptive drill engine that hunts your weak spots, and a timed sandbox that tells you, honestly, whether you’re ready. The iOS app adds eight complete Microsoft curricula for learning the ground without chasing a certificate.

Two products, no shared progress.The web workspace is online and account-backed; it is not an installable or offline PWA. CairnNative is a separate offline app whose progress may sync only through private iCloud.
54
Microsoft certification tracks, from Fundamentals to Applied Skills.
5,300+
Practice questions across domains — written, explained, scored.
Adaptive
Drill engine surfaces the weakest subdomain on every session.
Timed
Microsoft-style sandbox mirrors the real exam format, every type.
Illustrative practice state

Drill mode learns the question you almost got right.

Every answer feeds the weak-spot engine. Get a Responsible AI question wrong and Responsible AI shows up more often tomorrow, weighted toward the things you guessed at rather than the things you knew cold.

Study GuidePracticeFlashcardsSandboxDiagnostic
AI-901 · Adaptive mode
Domain 1 · Responsible AI

Which of the following are Microsoft Responsible AI principles?

Fairness
Privacy and Security
Transparency
Maximum throughput
The six Microsoft Responsible AI principles are Fairness, Reliability and Safety, Privacy and Security, Inclusiveness, Transparency, and Accountability. “Maximum throughput” is a performance metric, not a principle.
Responsible AI confidence ↑ · queued for review in 3 days
What the app gives you

Five surfaces. One outcome.

Each cert track ships the same five tools, tuned to the exam’s real domain weights and question formats.

A study guide written to stick.

Every concept gets an analogy, a Mermaid diagram, and an exam tip pointing at the way Microsoft tends to phrase it. Section quizzes prove you got it, then unlock the next stone.

AnalogyTokens are syllables, not whole words.
Exam tipGrounding vs. fine-tuning — trick wording.
DiagramHow a retrieval-augmented chat call flows.

Practice that hunts weak spots.

Filter by domain, drill by confidence, or let adaptive mode pick the next question for you. Daily warm-up keeps the streak alive.

Flashcards on a spacing schedule.

Concept cards graduate from new → learning → review on an SM-2-style interval. Cards you flunk land back in tomorrow’s deck.

A sandbox that feels like exam day.

Timer, flagging, navigator, every Microsoft question type — case study, hot-area, drag-match, ordering. Scaled score at the end, just like the real one.

A diagnostic that’s honest.

Domain-weighted accuracy maps to an estimated scaled score against the 700 pass line. No green checkmark until the numbers earn it.

Your hub inside the app

A dashboard that remembers where you stopped.

Stat row up top, resume widget on the left, certification tiers on the right — one click puts you back in the section you left at 2 a.m.

CairnStudy sheet · 2026-08-05
Good morning.
Your Microsoft certification study companion.
Sections
34
across 3 tracks
Practice Qs
1,208
questions answered
Best score
812
scaled, out of 1000

Pick up here

Continue · 2 days ago
Generative AI & Agents
AI-901 · Study guide · §5 · 64%Resume →

Certification tiers · 05

Fundamentals
Entry-level cloud, AI and data concepts.
08 exams
2 in progress
Associate
Day-to-day operator and engineer credentials.
26 exams
Applied Skills
Scenario-based, project-shaped credentials.
10 exams
Specialty
Narrow, deep workloads like SAP and virtual desktop.
06 exams
On iPhone and iPad only

Eight offline curricula in the current build.

The current iOS build bundles eight learning curricula for offline reading. They are not certification workspaces and do not carry a pass score or timed paper. Rights, attribution, and asset-provenance remediation is source-ready in the current branch; a higher-numbered build and App Store resubmission still remain.

9:41Wed Aug 5
CairnExamsCoursesActivitySettings
Open curricula

Study the ground, not just the exam.

Available courses08
MicrosoftMIT

AI for Beginners

Microsoft's free 24-lesson AI curriculum — neural networks from the perceptron up, computer vision, NLP through transformers, and a closing lesson on AI ethics.

Introduction to AISymbolic AINeural Networks+412 / 24 lessons
MicrosoftMIT

Generative AI for Beginners

Microsoft's free 21-lesson generative AI curriculum — how large language models work, prompt engineering from fundamentals to advanced patterns, then building real applications.

FoundationsPrompt EngineeringBuilding Applications+305 / 21 lessons
MicrosoftMIT

Machine Learning for Beginners

Microsoft's free 27-lesson introduction to classical machine learning with Scikit-learn. Regression, classification, clustering, NLP, time series and reinforcement learning.

RegressionBuild a Web AppClassification+600 / 27 lessons
MicrosoftMIT

Data Science for Beginners

Microsoft's free 20-lesson introduction to data science. Defines the field and its ethics, works through relational and non-relational data with Python and Pandas.

Working With DataData Visualization+400 / 20 lessons
MicrosoftMIT

Web Development for Beginners

Microsoft's free 25-lesson introduction to web development. Programming basics, GitHub and accessibility, JavaScript fundamentals, then six projects to build.

Getting StartedJavaScript Basics+600 / 25 lessons
MicrosoftMIT

AI Agents for Beginners

Microsoft's free 18-lesson course on building AI agents. Agentic frameworks and design patterns, tool use and retrieval, planning, then production concerns.

FoundationsCore Capabilities+500 / 18 lessons
MicrosoftMIT

IoT for Beginners

Microsoft's free 24-lesson course on the Internet of Things, built around growing, transporting, processing and selling food. Sensors, MQTT, edge ML and a voice assistant.

Farming with IoTTransport+400 / 24 lessons
MicrosoftMIT

MCP for Beginners

Microsoft's free curriculum on the Model Context Protocol — the open standard that lets AI models call tools and read data. Servers and clients across six languages.

FundamentalsMCP Tooling+400 / 60 lessons
iPad · two columns
iPad first
  • AI for Beginners24 lessons
  • Generative AI for Beginners21 lessons
  • Machine Learning for Beginners27 lessons
  • Data Science for Beginners20 lessons
  • Web Development for Beginners25 lessons
  • AI Agents for Beginners18 lessons
  • IoT for Beginners24 lessons
  • MCP for Beginners60 lessons

This is current pre-release content, not a representation that App Review or every rightsholder requirement has been resolved.

The iPad layout came first, not last.

On iPad, navigation moves into the title bar, card grids resolve to two columns, and reading surfaces hold a measured line length rather than running the full width of the display. Column widths are tuned per size class — the grid above is the shipping layout, and its minimum column width exists specifically so an 11-inch iPad in portrait still gets two columns.

Now on iPhone and iPad

Cairn went native — and left the server behind.

Cairn is fully standalone: there is no sign-in, Nintek server or app-authored network call. Progress stays local and can sync only through your private Apple iCloud database; it never syncs with the web app. The current build includes bundled exam and course material, but rights and attribution remediation is still pending integration before the rejected release can be resubmitted.

No public App Store availability. Version 3.0 build 2 was rejected and the combined submission remains unresolved. The proposed Full Exam Library · $14.99 non-consumable is still in review and cannot be purchased from a public listing.

Eight offline curricula in the current buildThe native build contains eight bundled learning curricula. Their rights, attribution and asset provenance are under active remediation and must be integrated before App Store resubmission.
Designed for iPad, not stretched to itNavigation moves into the title bar, grids resolve to two columns, and reading surfaces hold a measured line length instead of running the full width of the display. The column widths are tuned per size class, down to the 11-inch iPad in portrait.
Private iCloud sync, not web syncYour progress lives locally and may follow you between Apple devices through your private iCloud database. The web app uses a separate Azure store; the two progress histories never connect.
Everything, offlineQuestion banks, flashcards, study guides, glossaries and whole course curricula are bundled into the app. Nothing to download, nothing to wait for, nothing that breaks when the signal drops.
Your streak on the Home ScreenA small or medium widget keeps your streak, cards due, focus exam and best score in view — so the habit does not depend on remembering to open an app.
A timer on the Lock ScreenStart a timed sandbox exam and a Live Activity puts the countdown in the Dynamic Island and on your Lock Screen. Check the clock without leaving the question.
Ask Siri“Study with Cairn” opens straight to your exams. “How am I doing in Cairn” jumps to your activity. Both work from Spotlight and inside Shortcuts.
One reminder, at your hourA single daily nudge at a time you choose, scheduled on the device itself. No notification server, no engagement campaign.

Release blocked after reviewiOS 17 or later · iPad and iPhone · More about the native apps

Stack your first stone.

One place for every track, with Apple-device progress carried through private iCloud and kept separate from the web app. Built for the person studying alone at the kitchen table.

Cairn · Built for working engineers studying at the kitchen table.

Need help? Visit Cairn Support or read theCairn Privacy Policy. Use of Cairn is subject to the Nintek Terms.