Caminho do Conhecimento – CDC

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About this app

The Path to Knowledge (CDC) is a study platform for the ENEM (Brazilian National High School Exam) and university entrance exams, guided by Principia, an AI-powered tutor. Everything happens within a notebook: what you study, what she explains, and what still needs reviewing is recorded, page by page.

Talk to Principia
• Ask about any content and receive a step-by-step explanation at your own pace.

• Photograph an exercise and solve it together with her.

• She draws graphs, figures, and diagrams on the board to illustrate the idea.

• Write or speak: hold the microphone to dictate, or open the voice conversation and listen to her answers.

• She remembers what she has already explained and what you have told her about your routine. Everything she saves appears on your profile.

Lists and simulations
• Lists organized by subject and difficulty level, with questions from the ENEM and university entrance exams.

• Stopwatch showing the total time and the time for each question.

• In the results, you see where you succeeded, where you failed, and where you spent the most time, and you can review each question with Principia.

Essay Writing
• Write by hand, photograph it, and send it. The essay is transcribed and corrected according to the five ENEM competencies, with feedback for each one.

• A new topic every week and short practice exercises for each competency.

Summaries
• Summaries by subject, to review in your notebook or save as a PDF on your phone.

Trees and Roadmap
• The Trees show, subject by subject, the topics you already master and those you still need to master.

• The Roadmap estimates your performance on each ENEM exam and tracks the goal you set.

Plan and Reminders
• Principia creates a study plan with you and organizes your day in the Diary.

• Request a reminder and receive a notification at the agreed time.

At your school
• If your school uses the CDC (Center for Study and Communication), the lists given by teachers appear directly in your notebook.

Subjects: Mathematics, Physics, Chemistry, Biology, History, Geography, Portuguese, and Essay Writing.

Your Data
• No ads and no advertising trackers.

• The audio you record to talk to Principia is not saved.

• You can delete your account whenever you want, within the app itself.

Good to Know
• Principia is an artificial intelligence and can make mistakes. Check what is important — and, if an answer seems wrong or inappropriate, tap "Report" on the answer itself.

• Lists, simulations, and the essay writing studio are unlocked after your registration is approved or when you log in through your school.

What’s new

Versão 1.6 — o CDC chega ao Google Play.
• Converse com a Principia por texto, foto ou voz, e ouça as respostas dela.
• Listas e simulados com cronômetro, tempo por questão e revisão dos erros.
• Estúdio de redação: envie a foto da sua redação e receba a correção nas cinco competências do ENEM.
• Árvores e Rota para acompanhar o que você já domina e a sua meta.
• Lembretes por notificação, e uma tela própria quando a internet cai.