Official Release StudyOS is live with AI Study Sessions, Mock & Tuition Tests, Mistake Bank & Countdown Timer. Download APK →
StudyOS Android
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StudyOS
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All-In-One Intelligence & Exam Workspace for Android

The Distraction-Free Study System
Engineered for Top Scorers

StudyOS replaces fragmented flashcard apps, messy test calendars, and bloated timers with a single calm, 100% offline intelligence engine that tells you exactly what to do right now.

Download StudyOS APK Explore All 11 Features
100% Offline (Local SQLite)
Zero Ads & Zero Trackers
Android 8.0 – Android 15
Package: 13.0 MB
25:00
Focus Session
Live In-App Feature

Built-In Sidebar Countdown Timer

Directly accessible from any subject, chapter, or mock test without switching apps. Integrated with Android's system AlarmManager for persistent audio alerts even if your screen sleeps.

  • Count down or count up stopwatch
  • Logs elapsed focus time into subject momentum
  • Zero background battery drain
Complete Architecture

Designed for How Serious Students Actually Study

Forget generic to-do apps. StudyOS is built specifically around the cognitive rhythm of exam preparation: Learn, Test, Log Errors, and Spaced Retention.

Core Engine 25-Min Focused Cycle

Distraction-Free AI Study Session

Instead of passive reading, StudyOS puts you through a guided cognitive cycle:

STEP 1
Learn
Concept Input
STEP 2
Recall
Active Retrieval
STEP 3
Practice
Problem Solving
STEP 4
Evaluate
Self-Rating
STEP 5
Complete
Metrics Saved
View Session Architecture →
New Dedicated Tab Subject · Date · Time

Mock & Tuition Tests Column

Weekly coaching quizzes and tuition test series are not major final exams. StudyOS gives them a dedicated column with exact date and time tracking:

MOCK & TUITION Tomorrow · 04:30 PM

Rotational Dynamics & Torque Mock Test

Subject: Advanced Physics · Allen Coaching Center

Explore Mock Tests Architecture →
Diagnostic Engine 5 Error Categories

The Mistake Bank & Root-Cause Classifier

High scorers don't just solve more questions — they ensure they never make the same error twice. Categorize errors into 5 precise cognitive buckets:

Concept gap Memory gap Calculation error Misread question Careless mistake
Learn How Mistake Bank Works →
Algorithm 7-Dimension Formula

True Exam Readiness Score

A single percentage that synthesizes syllabus coverage, recall prompt accuracy, practice velocity, unreviewed mistakes, memory decay, and proximity to exam day.

Score = (0.35 * Syllabus) + (0.35 * Recall) - (Penalty * Mistakes)

Calculated on-device in under 5ms with zero cloud delay.

Read Engine Documentation →
Privacy First Local SQLite Architecture

100% Private, Zero Cloud Storage

Your study notes, exam schedules, and test mistakes stay entirely in your phone's encrypted sandbox. No account creation required. Works flawlessly on airplanes, libraries, and offline study rooms.

  • No Firebase, no analytics beacons
  • Optional OpenAI/Gemini BYO key stored in EncryptedSharedPreferences
  • Full offline JSON/database export & backup
Read Privacy Manifesto →
Interactive Simulator

Calculate Your Exam Readiness

Test the exact algorithm running inside StudyOS. Adjust the parameters below to see how syllabus completion, active recall accuracy, and mistake penalties combine.

Syllabus Completed 75%
Active Recall Accuracy 82%
Unresolved Mistakes in Bank 3
Days Remaining Until Exam 14d
Estimated Readiness Index
78%
NEEDS TARGETED RECALL

Clear concept gaps in weak chapters. Review dynamic revision queue.

Cognitive Error Science

The 5-Category Mistake Taxonomy

Click an error category to see how StudyOS diagnoses and fixes common student pitfalls.

Concept Gap

Highest Exam Risk
Real-World Student Scenario

Confused Electric Potential with Electric Field intensity when solving 3D point charge questions.

Diagnostic Root Cause

Underlying physical theorem was memorized without geometric derivation intuition.

StudyOS Automated Remediation

StudyOS AI Study Session prompts you with first-principles derivation before allowing practice problem retry.

Comparison

Generic Apps vs StudyOS

Why bloated study apps slow you down, and how StudyOS keeps you in a state of flow.

Feature Dimension StudyOS (Android) Generic To-Do / Timer Apps Cloud Flashcard Apps
Mock & Tuition Tests ✓ Dedicated Tab, Date & Native Time ✕ Generic calendar event ✕ Unsupported
Mistake Bank Taxonomy ✓ 5 Cognitive Root Causes ✕ None ✕ Only binary pass/fail
Exam Readiness Index ✓ 7-Dimension Mathematical Algorithm ✕ Superficial streaks ✕ Card counts only
Network & Privacy ✓ 100% Offline Room SQLite △ Cloud sync required ✕ Forced sign-in & telemetry
Monetization ✓ 100% Free & Open Source ✕ Monthly subscription ✕ Ads & paywalled decks
Production APK

Get StudyOS for Android

Download the standalone APK directly. Zero Google Play tracking, instant installation, and guaranteed offline privacy.

Download APK (12.9 MB) Verify Checksum & Details
SHA-256: 6ebf52b7a74dea6e78913a55aec75f0b3e6033b6de6c5eadbb103af62b2b7504
Compatible with Android 8.0 (Oreo) through Android 15 • ARM64, ARMv7, x86_64