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CogniGuide

Double Bubble Map Maker for Compare and Contrast

See how a double bubble map sets two topics side by side, with shared traits in the middle. Then generate one from your own notes, PDF or slides.

No credit card required

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CogniGuide at a glance

What you get
Interactive mind maps of the main ideas and how they connect. Free: overview maps (detailed maps on your first 3 creations). Plus: detailed maps with supporting concepts.
Exports
Your first PDF or PNG export is free; Plus exports anytime.
Price
Free plan: 5 creations a week, up to 3 a day. Plus: $9.99/month or $99.90/year (USD; local prices at checkout).
Sign-up
A free account is required before you create anything (Google or email). No credit card.
What you can upload
PDF, Word (.docx), PowerPoint (.pptx), plain text or Markdown, and images (PNG, JPG, WebP, GIF), or type a topic. One file per creation on the free plan; several at once on Plus.

How it compares: vs Knowt · vs Quizlet · vs NotebookLM · vs Mapify

Build a Double Bubble Map From Your Material

Upload your reading or type two topics, and the AI sorts the similarities and differences into a clear map.

Built From Your Own Notes

Upload a PDF, Word file, PowerPoint or text file, and the map pulls out the traits of each topic.

Shared and Separate Traits

Differences sit in the outer bubbles and similarities in the centre, so the comparison is easy to scan.

Quiz and Flashcards Next

Turn the finished map into a quiz, or make flashcards from the same notes to test yourself.

How to Make a Double Bubble Map

Three steps from your reading to a comparison you can revise.

  1. 1

    Add Your Material

    Upload notes or a file, or type the two topics you want to compare.

  2. 2

    AI Builds the Map

    The AI lists each topic's traits and places shared ones in the middle.

  3. 3

    Study, Expand and Export

    Expand any branch, edit the text, then export as PNG or PDF, or quiz yourself.

Double Bubble Map Maker: Structure and Use

A double bubble map is a thinking map for comparing two things. Two large circles hold each topic's unique traits, and the overlapping centre holds the shared traits. Teachers use it for compare and contrast writing, science, history and literature, because the visual layout shows similarities and differences at a glance.

  • Left bubble: traits that belong only to the first topic
  • Right bubble: traits that belong only to the second topic
  • Centre overlap: characteristics both topics share
  • Connecting lines: link each trait to the bubble it belongs to
  • Summary: a sentence stating the main similarity and difference

Use the finished map to plan a compare and contrast paragraph or prepare for a test. CogniGuide can build a personalized double bubble map from your own notes in a few minutes.

Explore related topics

free bubble map templateGet a free bubble map template you can download and fill in, with a starter structure for a central idea, supporting details and examples.double bubble map exampleA double bubble map compares two things by listing shared traits in the middle and unique traits around each side. See a worked example, then make your own from notes.brainstorming bubble map templateA brainstorming bubble map template shows how to group ideas around one central topic, with example branches for ideas, causes and effects.bubble map format guideA bubble map format shows a central topic with linked adjectives around it. See an example map, how to lay one out, and when to use it.editable bubble map templateAn editable bubble map template shows how to describe a topic with central, branch and adjective bubbles.free editable double bubble map templateGet a free editable double bubble map template for comparing two things, with shared and unique traits. Then build your own from notes or a PDF with CogniGuide.double bubble map exampleSee a double bubble map example that compares two topics with shared and unique traits.double bubble map templateGet a double bubble map template for comparing two topics, plus steps to build your own from notes.

Double Bubble Map Maker Questions

Common questions about double bubble maps and making one with CogniGuide.

What is a double bubble map used for?

It is used to compare and contrast two topics. Unique traits go in the outer bubbles and shared traits go in the centre, which makes it a common planning tool for essays and lessons.

When should I use a double bubble map instead of a Venn diagram?

Use a double bubble map when you want to list traits in full sentences or short phrases with space to explain them. A Venn diagram suits quicker, shorter comparisons.

Which files can I upload to make a double bubble map?

You can upload a PDF, Word (DOCX), PowerPoint (PPTX), text or Markdown file, or an image. You can also just type the two topics.

Is the double bubble map maker free to use?

Yes. The free plan allows 5 creations a week with no payment needed, and you can turn any finished map into a quiz.