Built Filo, a 1:1 Exam & Assignment Help App With 5M+ Downloads and a 4.5-Star Rating Across 250K+ Reviews
Filo is a mobile app that connects students to a subject expert for a 1:1 explanation the moment they get stuck. Built native for iOS and Android, it pairs on-demand live tutoring with a full study library — notes, practice problems, test series, reference books, and AI-generated solutions — so a learner can go from a hard question at midnight to a clear, worked explanation in minutes.
- Client
- Filo Edtech Inc
- Industry
- EdTech / Online Tutoring
- Services
- Product Design, iOS & Android App Development, Expert Matching & Live Session Infrastructure
- Platform
- Mobile App (iOS & Android)
- Timeline
- 7 Months
About the Project
Filo is a mobile app that connects students to a subject expert for a 1:1 explanation the moment they get stuck. Built native for iOS and Android, it pairs on-demand live tutoring with a full study library — notes, practice problems, test series, reference books, and AI-generated solutions — so a learner can go from a hard question at midnight to a clear, worked explanation in minutes.
Help That Never Arrives When Students Actually Need It
Students hit a wall on a single problem — a step in a proof, one line of code, a concept the textbook skips — and have nowhere to turn until the next class. Generic answer apps hand over a final result with no reasoning, tuition centres run on fixed schedules, and searching for the right notes or past papers eats the study time that was left.
No help at the moment of the doubt
The question comes up during late-night revision, long after any teacher or tutor is reachable.
Answers without explanation
Solver apps show the final answer but skip the working, so the student still can't reproduce it in an exam.
Scattered study material
Notes, practice sets, reference books, and test series live across dozens of sites with no single place to revise from.
Tutoring that doesn't scale
One-to-one coaching is effective but tied to fixed slots, travel, and a price most students can't sustain.
From a stuck student to a live expert in minutes.
We turned on-demand tutoring, a structured study library, and AI assistance into a single native app — starting from how students actually study for exams, then designing, testing, and shipping a flow they could rely on the night before a test.
01 / Discover
Map how students revise, where they get stuck, and what makes an explanation actually land.
02 / Design
Shape the ask-a-question flow, expert matching, and the live 1:1 session experience.
03 / Validate
Test match speed, session quality, and the study library with students during real exam prep.
04 / Deliver
Ship to the App Store and Google Play with expert supply, content, and AI solutions in place.
On-Demand 1:1 Tutoring, Backed by a Full Study Library
We built native iOS and Android apps that connect a student to a subject expert for a live 1:1 explanation within minutes of asking. Around that core, Filo bundles curated notes, practice problems, test series, reference books, and AI-generated step-by-step solutions — plus a feed showing what peers are studying — so every part of exam and assignment prep happens in one place.
Ask any question and get matched to a subject expert for a live 1:1 session, with the full working explained step by step — not just the final answer.
Revise from one library of notes, practice problems, test series, and reference books, with AI-generated solutions when an expert isn't needed.
More than a solver — a full exam-prep companion.
Beyond live help, Filo brings notes, practice sets, test series, reference books, AI solutions, and a peer-learning feed into the same app, so students open one tool for every stage of preparing for an exam or finishing an assignment.
One place to ask, learn, practice, and test.
By combining on-demand expert sessions with structured content and AI assistance, Filo gives students a dependable way to clear doubts the moment they appear and keep momentum through revision — reaching 5M+ downloads and a 4.5-star rating across 251K+ reviews.
On-Demand Expert Matching
A student's question is routed to an available subject expert in minutes for a live, 1:1 explanation over voice and a shared workspace.
Structured Study Library
Notes, practice problems, test series, and reference books are organised by subject and exam, so revision doesn't start with a search.
AI-Generated Solutions
For routine questions, students get an instant step-by-step worked solution without waiting for a session.
Colours And Typography
Typography
We paired Poppins for headings with Inter for body copy to keep a friendly, student-facing tone while staying highly legible on dense problem sets and long explanations. The app is often used late at night under time pressure, so contrast and hierarchy came first.
Poppins
Inter
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Founder & CEO at CrossSonic
