Pricing

Simple, honest pricing

All core tools are free right now. Pro adds saves and exports when it launches.

Free
$0/month
All 8 tools. No login, no install.
  • ✓DFA / NFA Builder + String Tester
  • ✓NFA → DFA Subset Construction
  • ✓Mealy ↔ Moore Conversion
  • ✓PDA Stack Simulator
  • ✓Turing Machine Tape Animator
  • ✓Pumping Lemma Proof Generator
  • ✓Arden's Theorem Solver
  • ✓Regex → NFA → DFA Pipeline
  • ✓DFA Minimization (Table Filling)
  • ✓Canvas, Table and Text Input
  • ✓Step-by-Step Explanations
  • ✓Visual SVG Diagrams
  • ✓Unlimited use, always
Open App — Free
Pro
Coming Soon
$4/month
For serious students and educators.
  • ✓Everything in Free
  • ✓Save automata to cloudSoon
  • ✓Export diagrams (PNG, SVG)Soon
  • ✓Export proofs as PDFSoon
  • ✓Shareable linksSoon
  • ✓Session historySoon
  • ✓Priority support
Compare

Full comparison

Feature Free Pro
Core Tools
All 8 TOC tools✓✓
Canvas, Table and Text input✓✓
Step-by-step explanations✓✓
Visual SVG diagrams✓✓
Unlimited use✓✓
Pro Features
Save automata to cloud—Soon
Export diagrams (PNG, SVG)—Soon
Shareable links—Soon
Priority support—✓
FAQ

Common questions

Is Deltora really free?

Yes. All 8 core tools are free with no login required right now.

Do I need an account?

No. Open the app and start immediately. An account will only be needed for Pro cloud-save features, which are not yet live.

When is Pro launching?

Pro features are in development. Click Notify Me above to get an email when they launch.

Can I use this for university exams and GATE?

Yes. Deltora matches textbook definitions from Sipser, Hopcroft-Ullman, and Aho. Every tool is designed for students preparing for exams and GATE 2027.

What browsers are supported?

All modern browsers — Chrome, Firefox, Safari, Edge. No installation, no plugins, no dependencies.

Start free.
No strings attached.

Open Deltora and solve your first automaton right now.

Open Deltora →