Qz Loop: Document to Quiz & Spaced Repetition
Turn Study Materials into Interactive Quizzes with Spaced-Repetition Recall Loops
About this app
Qz Loop is an intelligent, privacy-first mobile study companion designed for students, medical candidates, civil service aspirants, and lifelong learners. Turn your textbooks, question banks, lecture slides, and notes into interactive Multiple-Choice Questions (MCQs) in seconds. With the built-in 'Qz Loop' spaced-repetition recall engine, questions return at scientifically calibrated intervals right before you forget them, helping you master complex subjects with long-term memory retention.
Built on a strict Local-First & Zero Cloud Leakage architecture, Qz Loop processes your private study documents 100% on your device using native digital text extractors and embedded on-device Google ML Kit OCR. Your files, extracted questions, bookmarks, and test scores never leave your phone. No mandatory signup, no passwords, and no hidden subscription paywalls on core practice features.
Practice unlimited quizzes, conquer the dedicated Mistake Vault to turn weak spots into strengths, simulate real-world timed exams with negative marking, and flip active-recall flashcards. Invite study partners through the anonymous referral program to earn bonus ad-free practice time.
Request Account & Personal Data Deletion
We respect your complete ownership of your data. If you wish to delete your account, purge synced cloud records, or erase all personal data associated with Qz Loop: Document to Quiz & Spaced Repetition, you can submit a deletion request directly to our developer team at any time.
How to submit your deletion request (Quick & Simple):
atish2k22@gmail.com
Our official support & privacy inbox.
• App Name: Qz Loop: Document to Quiz & Spaced Repetition
• Your Registered Email or Phone Number used in the app
All cloud backups and records permanently erased within 30 days. You receive a confirmation email.
App Screenshots & Preview
Core Features & Highlights
Intelligent word-level geometric line clustering preserves complex formulas, coordinate pairs, and tricky 'Match List-I with List-II' questions with zero option scrambling.
Instant deterministic parsing for digital PDFs, DOCX files, and text notes (Engine A), combined with on-device Google ML Kit OCR for scanned textbook pages and photos (Engine B).
Beat the Ebbinghaus forgetting curve with intelligent recall intervals (2 min, 10 min, 2 hrs, 6 hrs, 1 day, 1 week) scheduled dynamically whenever you review questions.
Your study materials, extracted quizzes, and practice scores are processed and stored strictly on your device sandbox with zero remote server archiving or AI leaks.
Automatically captures wrongly answered questions into a focused remediation queue, letting you drill problem areas until you achieve 100% mastery.
Experience authentic test conditions with customizable time countdowns, optional negative marking (+4 / -1), and detailed post-exam scorecard breakdowns.
Automatically detects and links trailing answer tables and numerical integer answers without index drifting.
Categorize study sets by subjects (Physics, Chemistry, Biology, Maths) and chapters with intuitive progress and accuracy tracking.
What's New in Recent Updates
- Production release ready for Google Play Store.
- Adaptive Geometric Layout Engine: Flawless extraction for Match-the-Following (List-I & II), complex math formulas, and coordinates.
- Auto answer key matcher with numerical integer question support.
- Strict Exam Simulator with timer countdowns and negative marking (+4 / -1).
- Dedicated Mistake Vault to isolate and master weak chapters.
- Updated high-contrast brand icon and refined Material 3 dark/light study modes.
Privacy Policy for Qz Loop: Document to Quiz & Spaced Repetition
Package Name: com.procoders.qzloop • Developer: Pro Coders Mobile Studio
This Privacy Policy applies to the mobile application Qz Loop: Document to Quiz & Spaced Repetition ("Application") developed by Pro Coders Mobile Studio ("we", "our", or "us") and distributed via the Google Play Store under package name com.procoders.qzloop.
1. Information Collection and Use
Depending on features utilized, the Application processes the following categories of data:
- 100% LOCAL-FIRST DOCUMENT PRIVACY GUARANTEE: Your uploaded study files, PDF textbooks, DOCX notes, captured images, and camera scans are processed and stored exclusively on your local device sandbox. Pro Coders operates ZERO cloud document storage servers and NEVER permanently archives, inspects, or sells your personal study materials.
- Advertising & Device Identifiers (Google Advertising ID / AD_ID): Used strictly by Google AdMob to deliver contextual, non-intrusive advertisements and detect fraud. Qz Loop never links advertising identifiers to personal user identities. Students can earn 7 days of 100% ad-free study through peer referrals or reset advertising IDs via Android OS settings.
- Anonymous Anti-Fraud Referral Key: An anonymous, one-way cryptographically hashed device identifier is utilized strictly to deliver the viral referral program (granting 7 days of ad-free experience per invited peer) and prevent duplicate referral fraud in Google Firebase Realtime Database. This hash cannot be reverse-engineered and is NEVER used to track you across external apps.
- Diagnostic & Performance Telemetry: Non-identifying crash telemetry, ANR diagnostics, and app performance metrics provided via Google Play Services and AdMob diagnostics to maintain 99.9% crash-free stability.
2. Android System Permissions
Required to load Google AdMob advertisements, synchronize anonymous referral codes, and communicate with Google Gemini AI for question structuring.
Used to detect network connectivity before initializing ad requests or syncing referral redemption status.
Required by Google AdMob on Android 12+ (API 31+) to serve compliant, non-personalized or personalized ads and combat ad click fraud.
Google AdMob Monetization & Non-Intrusive Ad Experience Policy
Qz Loop is sustained by unobtrusive advertising powered by Google AdMob to keep all educational and spaced repetition tools 100% free. In strict adherence to Google Play Better Ads Policies and student focus guidelines: • ZERO Ads During Active Practice: Advertisements NEVER interrupt you while you are actively reading, formulating, answering, or reviewing quiz questions. • Natural Breakpoints Only: Interstitial ads only appear at natural transition boundaries (e.g., immediately after completing a study session or following a newly imported document conversion). • Strict Cooldown: A 3-to-5 minute minimum cooldown is enforced between interstitial ads so you are never overwhelmed. • 7-Day Ad-Free Referral Pass: Any student who refers a peer unlocks 7 days of 100% ad-free learning across the entire application.
On-Device OCR & Zero Cloud Upload Commitment
Qz Loop uses Google ML Kit On-Device Text Recognition to convert images and scanned documents into text. All optical recognition algorithms execute entirely on your phone's processor. Camera images, photo gallery selections, and scanned pages are NEVER sent over the internet to external AI servers or remote third parties.
AI Question Structuring & Answer Key Identification
When you upload study materials, Qz Loop extracts raw text locally and utilizes Google Gemini AI to parse questions, detect multiple-choice options, and match answer keys. Text snippets are processed ephemerally in transit and are never permanently stored, cataloged, or used to train public machine learning models.
Anonymous Referral Verification System
To support our free learning mission, Qz Loop offers an optional student referral program where sharing the app gives you 7 days of ad-free study. To prevent fraud, our system uses a one-way hashed device signature recorded in Google Firebase Realtime Database. This token contains zero personally identifiable data and cannot be linked to your identity or other apps.
3. Third-Party SDKs & Services
4. Children's Privacy (COPPA & Play Families Policy)
Qz Loop is rated Everyone and is designed for students of all ages. Because the app does not collect personal identifiers, emails, names, or location data, it complies fully with the Children's Online Privacy Protection Act (COPPA) and Google Play Families Policies.
5. User Data & Account Deletion Requests
To request complete account deletion, cloud backup erasure, or inquire about our privacy standards, send an email to our official privacy inbox at: atish2k22@gmail.com.
Please provide your App Name (Qz Loop: Document to Quiz & Spaced Repetition) and your registered email address or phone number used within the app. All associated records and cloud backups will be permanently purged within 30 days.
Core educational functionality (100% on-device processing; NOT collected or uploaded)
Advertising, analytics, and fraud prevention (via Google AdMob & Firebase Referral Counter)
Analytics and app stability via Google Play Services and AdMob Diagnostics
Direct links required by Google Play Console during app submission and annual verification reviews:
Want to permanently delete your account, saved habits, documents, or backups for Qz Loop: Document to Quiz & Spaced Repetition?
Application Specifications
Declared Permissions
- android.permission.android.permission.INTERNET
Required to load Google AdMob advertisements, synchronize anonymous referral codes, and communicate with Google Gemini AI for question structuring.
- android.permission.android.permission.ACCESS_NETWORK_STATE
Used to detect network connectivity before initializing ad requests or syncing referral redemption status.
- android.permission.com.google.android.gms.permission.AD_ID
Required by Google AdMob on Android 12+ (API 31+) to serve compliant, non-personalized or personalized ads and combat ad click fraud.