No more disconnected diagram and spreadsheet
Draw nodes and connect streams — the calculation updates as you draw. Edit flow rates, recycle loops, approval rules, or inventory policies, and the entire model recalculates instantly.
Flowchart-based simulation & calculation
IAutoDrawSim is a flowchart-based simulation and calculation platform. Build models with nodes and streams, attach custom scripts or equations, and run steady-state or dynamic simulations — on one canvas. Used for chemical, manufacturing, logistics, energy, healthcare, finance and more.
Stop switching between Visio, Excel, and heavy simulation software. IAutoDrawSim keeps your model and your numbers on the same sheet — they never drift apart.
Draw nodes and connect streams — the calculation updates as you draw. Edit flow rates, recycle loops, approval rules, or inventory policies, and the entire model recalculates instantly.
Attach your own formulas to reactors, mixers, separators, queues, resources, or approval nodes. No compiled subroutines, no proprietary plugins. Model exactly the step your project uses.
Export stream tables, balance reports, and consumption indices to Excel or PDF. Fast enough for conceptual design, formatted to match the deliverables your project reviewers expect.
Used across process industries, manufacturing, logistics, energy, healthcare, finance, and public services — anywhere a process can be drawn, calculated, and simulated.
Skip weeks of complex simulator setup. Build and converge a full model in hours.
Drag nodes for equipment, tasks, resources, or services. Connect streams for material, energy, information, people, or capital.
Set parameters, write custom equations, or link Excel data sources. Recycle loops and recycles converge automatically.
Run steady-state or dynamic simulation, inspect curves and data tables, export Excel or PDF reports, or publish a read-only model.
Case study
A non‑isothermal esterification process with adiabatic reactor and unreacted raw‑material recycle loop. IAutoDrawSim auto‑converges the closed material‑energy balance without manual tear‑stream iteration.
The closed recycle loop from separator SEP back to mixer MIX is the core challenge: spreadsheets require tedious manual trial‑and‑error, while IAutoDrawSim resolves loop convergence together with coupled material‑energy balance during flowsheet solving. Equilibrium constant K automatically varies with reactor temperature for adiabatic operation.
The same canvas can model production lines, inventory networks, approval workflows, hospital queues, or service call chains.
Get Experience TemplateChoose a monthly/annual subscription, or buy a node-locked perpetual license that runs fully offline — no annual renewal, no network required.
At one-tenth the cost of traditional simulation software, it delivers higher efficiency and practical functions, with support for feature customization.
$0
For learning and non-commercial use.
$299/ seat / year
License tied to your account — use on any device.
$699 one-time
Node-locked to 1 PC, lifetime license, runs fully offline.
No. Chemical is one of the core use cases. Any problem with flows, nodes, variables, and calculations can be modeled — manufacturing, logistics, energy, healthcare, finance, government, and IT processes included.
Visio draws, Excel calculates, and the two drift apart. IAutoDrawSim keeps the diagram and the calculation on one canvas. Change the model, run it, and the numbers update.
Aspen and HYSYS are strict thermodynamic simulators with rigorous property databases. IAutoDrawSim is for non-rigorous, cross-domain, fast-iteration process modeling and calculation.
No. Built-in nodes can be configured with parameters. Complex logic can be written in simple JavaScript — no Fortran, no compiled code, no plugins.
Yes. The Offline Perpetual license runs fully locally on your PC. No network connection is required after activation, and no project data leaves your device.
You can export stream tables and material balance reports to Excel (.xlsx) and PDF. Diagrams can be exported as high-resolution SVG and PNG.
Yes. All files created in the free trial are fully compatible with the paid version. You can upgrade at any time without losing your work.
Start with a blank canvas or load the example. Your diagram and your numbers stay in sync — always.