Turn your class notes into a free mind map on Android
Upload a PDF, DOCX, PPTX, or photo of your pages and get an editable, explorable mind map you can open in your Android browser. No credit card needed to start.
Why a mind map helps with Android study
Android courses pile on lifecycle callbacks, intents, and manifest rules, and a free Android mind map lets you see how those pieces connect instead of memorizing them as separate lists.
- Seeing how components like activities and services relate to each other
- Spotting gaps when a branch from your lecture has no sub-points yet
- Editing the map so it matches your instructor's terminology
- Reviewing the whole unit on one screen before an exam
Editable maps
Rename branches, rearrange topics, and reshape the map after it is generated.
Built from your files
Upload PDFs, DOCX, PPTX, plain notes, or photos of pages read with text recognition.
Works in your browser
Open and study on an Android phone or tablet browser without installing a separate app.
How it works
Upload your notes
Add a PDF, DOCX, PPTX, text file, or a photo of your pages.
Generate the map
DeckOwl turns the material into a mind map of main topics and subtopics.
Edit and explore
Adjust branches to match your course, then expand and study from the map.
The free plan gives you 3 generations per month and studying in the browser. Exports and unlimited generations are part of the paid Plus plan, so you can try the map on your own material before deciding.
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Frequently asked questions
What are the main Android app components I need to know?
Most intro courses cover activities, services, broadcast receivers, and content providers. Activities handle screens, services run background work, broadcast receivers respond to system or app events, and content providers share data between apps.
How do I study the Android activity lifecycle?
Draw the callbacks as a chain from onCreate through onResume, onPause, onStop, and onDestroy, then note what each one is for. Quizzing yourself on which callback runs when the screen rotates is a good test of understanding.
Is the free plan enough to try DeckOwl?
The free plan includes 3 generations per month and studying in the browser, with no credit card needed to start. Exports are paid features, so they require an upgrade.
What do I get with the Plus plan?
Plus costs $99.90/year or $9.99/month and adds unlimited generations, PDF, DOCX, Anki, and CSV export, and spaced repetition. Students get 40% off with a school email.
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