Online classrooms on any Android phone

Teach live.
Learn anywhere.

OStudi turns a phone into a full online classroom. Share slides, draw on the board, speak live, take attendance, and use AI — without a laptop, without expensive software, on almost any internet connection.

Download for Android See what it does

Free to install · Android 8.0+ · .apk direct download

Everything a classroom needs — in one app

Built from the ground up for teachers in low-bandwidth areas. Every feature works on a mid-range Android phone.

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Snap or import slides

Photograph a textbook page, import a PDF, or build slides from scratch with text, shapes, and images. Auto-enhanced for clarity.

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Live whiteboard

Draw, circle, and annotate over any slide in real time. Every stroke streams to students instantly — even over slow mobile data.

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Live voice teaching

Stream your voice to the whole class with time-synced slide markers. Students who join late can replay every moment in order.

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AI slide maker

Type a topic — get a full deck back. Rewrite a slide with one tap. Powered by Gemini so lessons are ready in seconds.

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Class attendance

Automatic roll call as students join. Track presence per class, per student, per subject — without a paper register.

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Sessions & talks

Organise classes by subject or day. Each session holds multiple talks, each talk its own slides, notes, and recordings.

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Group chat & Q&A

Students ask questions in a live chat tied to the current slide. Whispers let quieter students reach the teacher privately.

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Works on 2G/3G

Thin payloads, background uploads, and offline queueing. If the signal drops mid-class, everything syncs when it's back.

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Bangla, English & French

Interface available in Bangla, English, and French, designed for teachers who aren't tech-savvy. Big buttons, minimal taps.

From install to first class in minutes

No laptop, no setup calls, no IT team.

Install the app

Download the APK below and tap to install. Android 8.0 or newer — that's nearly every phone sold in the last seven years.

Sign in with a link

Enter your email, tap the magic link we send you. No passwords to remember or reset.

Create a class

Give the class a name, add today's talk, snap or import slides. You're ready to go live.

Share with students

Send the class link. Students open it in any browser or the student app — no account required to join.

Made for real classrooms

If you've tried Zoom or Meet for a village school, you know why this exists.

For teachers

  • Teach from any Android phone — no laptop needed
  • Reuse your printed notes: just snap and go live
  • AI builds a lesson deck when you're short on time
  • Automatic attendance — no more paper rolls
  • Record the class for anyone who missed it

For students

  • Join from any browser — no app install required
  • See slides, hear the teacher, watch the whiteboard live
  • Ask questions without interrupting the class
  • Replay the full lesson: slides + voice + strokes, synced
  • Translate slides to your language with one tap

For schools

  • Runs on the phones teachers already have
  • No per-seat license cost — free to install
  • Works in rural areas on 2G/3G connections
  • Centralised roster and attendance across classes
  • Future: gradebook, parent reports, scheduling

Get OStudi on your phone

Direct APK download — takes about 10 seconds on mobile data.

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OStudi for Android

Android 8.0+ · About 3 MB
Download .apk
How to install:
1. Tap the download button above.
2. When the file finishes downloading, tap it.
3. If Android asks, allow installs from your browser for this one file.
4. Tap Install. You'll see OStudi in your app list.

Got a question before you install? See the FAQ.

Frequently asked

Is OStudi free?
Yes — the app is free to download and the core classroom features (slides, live voice, whiteboard, attendance, chat) are free to use. Some AI features may need a subscription or credits later, but teaching a class itself is always free.
Do my students need to install anything?
No. Students can join a class from any web browser using the class link — no signup, no app install. A dedicated student Android app is on the roadmap for offline replays.
Does it work without WiFi?
Yes. OStudi is designed for 2G/3G connections. Slides, strokes, and voice are compressed heavily and upload in the background. If the signal drops, the app queues everything and syncs when you're back online.
What phones does it run on?
Any Android phone running Android 8.0 (Oreo) or newer. That covers almost every phone sold in the last seven years. The app is about 3 MB, so it installs fast and leaves room on low-storage devices.
Is my class data safe?
Your sessions, slides, and recordings are stored securely on our servers and only you (as the teacher) can edit them. Students see only what you share in the class link. We don't sell data — ever.
Can I use OStudi outside Bangladesh?
Absolutely. The interface supports English, Bangla, and French today; more languages are coming. Teachers anywhere who need a lightweight, mobile-first classroom are the target audience.