Notes that think with you.

Write like on paper, on your PC or tablet. The AI reads your handwriting and solves math problems with the full working.

Three things paper can't do.

You write with a pen as usual, then calculate, study and organize with your notes.

Calculate & understand

Circle it. The AI reads, solves and plots.

  • ✓ Handwriting → text with the lassoAI
  • ✓ Solve equations with the full workingAI
  • ✓ Handwritten function → graphAI
  • ✓ Have your own solution checked, or just get a hintAI
  • ✓ Function plotter with transfer functions and Bode diagrams
Study

Your notes become study material.

The AI turns your notebook into flashcards and summarizes it. In study mode you only get the cards that are due today: what you know comes back in a few days, what is shaky comes right back.

  • ✓ Flashcards from the whole notebook, a page range or your bookmarksAI
  • ✓ Study mode with spaced repetition and statistics
  • ✓ Summary or a print-ready cheat sheetAI
  • ✓ Mock exam from your notebook, marked and gradedAI
  • ✓ Study podcast: two voices explain your notesAI
  • ✓ AI chat that knows your notebookAI
Organization

Multiple notebooks at once: side by side or as tabs.

Working through an exercise sheet and need the formula sheet too? Open both side by side in split screen or as tabs and switch with one click. No file searching, no context loss.

  • ✓ Split screen for two notebooks side by side
  • ✓ Optional browser-style tab bar
  • ✓ Search in texts and PDFs
  • ✓ "Find pages" searches by meaning, not just wordsAI
  • ✓ In sync across all your devices
Two notebooks side by side in split screen: an exercise sheet on the left, a formula sheet on the right.

Everything else that's included.

Annotate PDFs

Load lecture scripts and worksheets as a background and write right on them.

Templates & planners

Page templates, your own templates and planners with linked pages.

Voice notes

Record and play back, with AI also as text.

Photos & scans

Insert photos and straighten documents.

Import files

PDF, Word, PowerPoint and Excel become notebooks, several at once if you like.

Presentation mode

Show your notes full screen, with F5 on the PC.

Tasks & reminders

To-dos with deadlines, a timer and reminders for due flashcards.

Bookmarks & links

Mark important pages and link pages together.

Share

Share notebooks with friends and write in them at the same time; changes show up for everyone instantly.

Lock & protect

App PIN, fingerprint, locking single notebooks and two-factor sign-in.

Version history & trash

Restore earlier versions and bring back deleted items.

AI features come with Silver and up, cloud sync with Bronze and up. During the trial you try the app without either.

Built for everyone who wants more than just typing.

Fair, flexible, cancel anytime.

Try Synapse free for 7 days. Then pick the plan that fits: from the small Bronze plan to Platinum with full AI power.

Bronze
€1.99/month
Keep your notes safe, without AI
  • ✓ Unlimited local notes
  • ✓ All drawing tools
  • ✓ PDF export
  • ✓ 2 GB cloud sync
  • ✕ AI features
  • ✓ Function plotter
Choose Bronze
Gold
€10.99/month
More storage, more AI
  • ✓ Everything in Silver
  • ✓ 10 GB cloud sync
  • ✓ AI Plus · 2× the usage of Silver
  • ✓ Priority support
Choose Gold
Platinum
€19.99/month
Full AI power, Pro models
  • ✓ Everything in Gold
  • ✓ 20 GB cloud sync
  • ✓ AI Pro · 3× the usage of Silver
  • ✓ Premium support
Choose Platinum
Annual billing: save −12 %
Compare all plans in detail →

Frequently asked questions

Can I try Synapse for free?
Yes. You can try Synapse free for 7 days without a credit card. During the trial you explore the app (notes, drawing, function plotter, PDF); cloud sync is included from Bronze, AI features from Silver. After the trial you pick a plan or your account pauses.
How secure is my data?
Our servers are located in Germany. Backup copies of your notebooks are stored with Cloudflare, safeguarded by EU Standard Contractual Clauses. Details are in the privacy policy. Passwords are hashed, and all transfer is encrypted. You can delete your account including all data at any time.
Which devices does Synapse run on?
Synapse runs on Windows (PC and tablet). The Android app (phone and tablet) is coming to the Google Play Store; once it is there, the link will be on the download page. One subscription automatically works on all your devices.
How does the daily AI limit work?
Every plan with AI comes with a generous daily AI allowance that grows with the plan tier. The app always shows in real time how much you have left today; the allowance resets automatically every night. It is generously sized for everyday note-taking, calculating and asking questions. The plan overview shows which tier fits you.
Can I cancel anytime?
Yes, any time. Your subscription continues until the end of the paid period and then ends automatically. No hidden fees, no minimum term.
What if I end up not liking Synapse?
That's exactly what the 7-day free trial is for, no credit card needed. Buying a plan after the trial means you waive your right of withdrawal (instant AI access), but you can cancel anytime so no further charges occur. If something is technically broken, drop us a line at support@synapse-app.at. We handle these case by case.
What is the difference between AI Light, AI Plus and AI Pro?
These are three levels of AI. AI Light (Silver and up) is the fastest and covers handwriting and everyday tasks. AI Plus (Gold and up) and AI Pro (Platinum) work more thoroughly, for example on complex math and detailed explanations, and use more of your AI allowance for it. In the settings you choose for each feature which level it uses.

Ready to take smarter notes?

Start your 7-day trial. No credit card. No commitment.