Now with AI ✨

Your mind.
Organized.

An operating system built for UPSC aspirants who think clearly, study deeply, and want every minute of preparation to count.

💬 AI Mentor
📝 Collaborative Notes
🎯 Score Predictor
🧠 Memory Science
📋 Study Plans
🗣️ Voice Chat
📊 Smart Analytics
🇮🇳 Hindi Support
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Our belief

UPSC preparation isn't about doing more.
It's about doing it right.

Most aspirants don't fail because they didn't work hard. They fail because their preparation was scattered — notes in WhatsApp, PYQs in PDFs, mocks in registers, doubts in their head.

PrepOS exists for a different kind of aspirant. The one who understands that systems beat motivation, that data reveals what feelings hide, and that the best time to revise something is exactly when your brain is about to forget it.

We didn't build another question bank. We built an environment where your preparation finally makes sense to itself — with an AI mentor named Ally who knows your strengths, weaknesses, and exactly what to study today.

UPSC AI Mentor

Meet Ally.

Your personal AI mentor who knows your data, speaks your language, and shows up every single day.

AllyOnline

Your UPSC Study Buddy

What should I study today?

Hey ZalaZ! 👋 Based on your data:

  • Polity: 45% accuracy — needs focus
  • 5 revisions due today
  • 8 days inactive in Geography

Today's plan: 30 Polity MCQs + revisions. Let's go! 🎯

मौलिक अधिकार क्या हैं?
Ally is thinking
+
Ask Ally anything about UPSC...
3/10 todayAlly may make mistakes. Verify with official sources.

Not another chatbot. A real mentor.

Ally reads your stats, knows your weak areas, remembers your conversations, and gives advice that's actually personal to you.

Knows YOUR data

References your accuracy, streak, revisions due — not generic advice

Speaks your language

English, हिंदी, और Hinglish — Ally adapts to how you talk

Voice in & out

Talk to Ally during walks — get spoken replies back

UPSC-only focus

Politely blocks off-topic questions — stays focused on your prep

✨ 12+ Specialized Modes

Every UPSC need, one assistant.

From strategy planning to mains evaluation, mnemonic creation to mock interviews — Ally does it all.

Chat

Strategy

Daily Plan

Doubt Solver

Mnemonic

MCQ Gen

Mains Eval

Summarize

Personal Search

Weak Drill

Progress

Mock Interview

19+

AI Modes

3

Languages

24/7

Available

Free

To start

Try Ally Free

No credit card • Start in 30 seconds

How it works

Four ideas that
change everything.

01

Daily clarity

What to solve today, decided for you.

No more analysis paralysis. Based on your target date, weak areas, and revision schedule, we generate exactly what you should solve today. You just show up.

Today's Mission

14 questions to go

Designed for your target exam date

Polity

5

History

4

Economy

5

02

Memory science

Never forget what you've learned.

Every wrong answer is automatically scheduled for revision on Sunday using spaced repetition. By exam day, you'll remember what others have forgotten three times over.

Sunday Revision

Article 32 vs Article 226

Mastered ✓

Battle of Plassey causes

Revising...

Monetary policy tools

Mastered ✓

🧠 Reviewed at day 1, 3, 7, 21

03

Pattern intelligence

See what UPSC actually tests.

Our system analyzes years of PYQs to surface the themes that repeat, the topics that dominate, and the trends that matter. Study what counts, ignore what doesn't.

Trend Analysis

"Fundamental Rights"

Appears every year — 30 total in 5 years

2024
8
2023
6
2022
7
2021
5
2020
4

🎯 Study what UPSC actually loves

04

Your private library

Notes that breathe across devices.

Store every PDF, screenshot, and handwritten scan in your private vault. Share with the community if you want. Access anywhere, anytime. Forever yours.

Your Vault

📜

Polity

23 files

🏛️

History

18 files

🌍

Geography

15 files

💰

Economy

12 files

🔒 Private by default. Shareable anytime.

Notes that think with you.

A rich note-taking experience built for UPSC aspirants. Organize, share, and collaborate with your study partners — all in one place.

← All Notes
N
J
📜

Article 21 — Right to Life

#polity#fundamental-rights
H1BI🔗

Key Provisions:

"No person shall be deprived of his life or personal liberty except according to procedure established by law."

Landmark Cases:

  • Maneka Gandhi (1978) — Procedure must be fair & reasonable
  • Puttaswamy (2017) — Right to privacyNoha
234 words • 2 min readLive • 2 viewers

Beyond a notebook. A study group.

Take rich notes with formatting, tags, and notebooks. Then share with your prep partner and study together — without leaving the platform.

Rich editor with everything

Headings, lists, checkboxes, highlights, code blocks, links — built for fast note-taking

Organize with notebooks & tags

Group by subject, filter by tag, pin important ones, favorite the gold

Share with study partners

Invite anyone via email. They see your updates in near real-time.

Private by default

Only you can see your notes unless you explicitly share.

👑 PREMIUM · AI-POWERED

Your prep, predicted & planned.

Premium features powered by AI that analyze your data, predict your scores, plan your weeks, and keep you on track.

AI Score Predictor

PREMIUM

AI analyzes your last 30 days of practice and predicts your Prelims, Mains scores and Final Rank with confidence levels.

90%+ accuracy

AI Study Plans

PREMIUM

Personalized weekly study plans generated by Ally based on your weak areas, target date, and available hours.

Custom plans

Weekly Briefings

PREMIUM

Every Monday, Ally sends you a progress briefing with insights, what to focus on, and motivational nudges.

Every Monday

Monthly Reports

PREMIUM

Deep-dive PDF reports on your preparation — subject heatmaps, time analysis, readiness scores, and more.

PDF reports
Unlock Premium

Score Predictor • Study Plans • Briefings • Reports • Collaborative Notes

Built for depth

Every action you take
becomes a data point.

0

Days of preparation tracked

0+

Questions analyzed per session

0

AI Ally modes available

0%

Yours forever

Everything inside

Fifteen modules.
One ecosystem.

Everything a serious aspirant needs — no app-switching, no missing pieces, no excuses.

NEW

Ally AI Mentor

Your personal AI tutor — chat, evaluate Mains, generate MCQs, and more.

Collaborative Notes

Rich note editor with notebooks, tags & email sharing for study partners.

AI Score Predictor

AI predicts your Prelims/Mains score and rank from your practice data.

Daily Practice

Smart MCQ sessions calibrated to your exam date.

Mains Library

GS1–GS4, Essay & Optional answer-writing practice.

Spaced Revision

Wrong answers auto-scheduled for review.

PYQ Intelligence

Years of pattern analysis on what UPSC actually asks.

Syllabus Tracker

Official UPSC syllabus + your progress, side by side.

Personal Planner

Plan your week, build habits, never miss a topic.

Sticky Notes

Capture insights, formulas & key facts. Always at hand.

Private Vault

100MB encrypted storage for notes, PDFs & scans.

Community Library

Shared notes from aspirants who've cracked it.

Deep Analytics

Subject-wise accuracy, time trends, readiness score.

Leaderboard

Compete with serious aspirants. Stay motivated.

Book Tracker

NCERTs, standard books, monthly current affairs.

Built for both stages

Most platforms pick a side.
We don't make you choose.

Stage One

Prelims

Master 5000+ PYQs with smart pacing, instant explanations, and spaced repetition.

  • Daily target calibrated to your exam date
  • GS + CSAT separate progress tracks
  • Subject-wise accuracy heatmap
  • Sunday revision for weak topics
  • Question library with smart filters
  • Ally AI generates custom drill MCQs

Stage Two

Mains

Answer-writing practice for GS1–GS4, Essay & Optional. Track weekly progress.

  • All 6 papers: Essay, GS1–GS4, Optional
  • Word count & time tracking per answer
  • Weakest paper detection
  • Weekly & monthly progress charts
  • Model answers + key points
  • Ally AI evaluates your answers with scores
Your journey

From day one,
to that one day.

Day 1

You arrive

Set your target. We calculate your daily pace. Ally introduces itself.

Day 7

Patterns emerge

We surface your strongest and weakest areas with data. Ally starts recommending.

Day 30

Habits form

Your Sunday revision automates. Ally personalizes daily plans. Your streak builds itself.

Exam Day

You're ready

Because every step was tracked, measured, and optimized — with Ally by your side.

Manifesto

What we
stand for.

We believe in mornings spent learning, not searching for what to learn.

We believe data tells the truth that anxiety cannot.

We believe knowledge belongs to everyone, not just those who can afford it.

We believe the right system makes you 10x more effective than willpower.

We believe an AI that knows YOU is worth more than one that knows everything else.

We believe in building, in shipping, in shipping again.

Free to start

Core features free forever. Premium for power users.

Private by default

Your notes, your data. Encrypted. Never sold. Never shared.

Built with care

By aspirants, for aspirants. Shaped by real feedback, every week.

Ally is waiting for you

Start.
Today.

No credit card. No commitment. Just a thoughtful preparation environment — with your AI mentor Ally — that makes the next 365 days count.

Begin

Sign up in 30 seconds • Meet Ally instantly