A LogixPro alternative for ladder practice in your browser
LogixPro is a ladder logic simulator for Windows, made by Professor Bill Simpson's Learning Pit. Its maker is renaming it Professor Bill's LadderLab, and existing LogixPro licences still work. Its exercises and lab sheets are written for students. PLC Gym teaches the same first ideas, such as relay logic, timers and counters, in a web browser on 3D machines. Here is a fair side-by-side.
Which should you choose?
Choose LogixPro if
- Your course or college already uses its exercises and lab sheets.
- You want a one-off licence for a Windows PC.
Choose PLC Gym if
- You're on a Mac, a Chromebook, a tablet or a work laptop where you can't install software.
- You want to practise in Studio 5000 style languages, or Siemens TIA Portal ones.
- You want 3D machines and tests that check your logic automatically.
What each can and can’t do
| Question | LogixPro | PLC Gym |
|---|---|---|
| Where does it run? | PartlyOn Windows PCs only. Its maker says it won't run on a Mac, Chromebook or iPad. | YesAny modern browser on a laptop, desktop, Mac or Chromebook. A phone is fine for trying the machines and reading lessons. |
| Languages | PartlyLadder logic. Its exercises are written for RSLogix-style ladder. | YesSiemens SCL, LAD, FBD and GRAPH; Rockwell Structured Text, Ladder, FBD and SFC; Beckhoff TwinCAT Structured Text. |
| What your code controls | YesBuilt-in simulations, including a door, a silo, traffic lights, batch mixing, a bottle line and a lift. | Yes26 working 3D machines, from a pump to a whole factory, run by your code. |
| Exercises and marking | PartlyStudent exercises and printable lab sheets on its website. The site doesn't mention automatic marking. | YesA step-by-step course, 74 missions and 20 challenges. Automatic tests check every one, scan by scan. |
| Price | Yes$40 for a single licence key, paid once. A free trial to explore it first. | PartlyA free plan for good. Pro is £15 a month or £144 a year. Everything is free while we test, until 5 December 2026. Pro is a subscription, not a one-off payment. |
PLC Gym’s own limits are in the table too. The language reference lists where its simulator differs from TIA Portal and Studio 5000.
Try the same task here
Common questions
Does PLC Gym work on a Mac or Chromebook?
Yes. It runs in a modern web browser, so a Mac, a Chromebook or a Windows laptop all work, with nothing to install.
Is PLC Gym's ladder the same as RSLogix?
It follows Rockwell's Studio 5000 instruction rules for Ladder and Structured Text, and Siemens' rules for TIA Portal's languages, on PLC Gym's own simulator. The language reference lists where it differs from the real software.
What happened to LogixPro?
Its maker, The Learning Pit, is renaming it Professor Bill's LadderLab. Its page says existing LogixPro licences and key cards will keep working.
Where these facts come from
Checked on 31 October 2026. Prices and features change, so check LogixPro’s own site before you buy.
LogixPro is a trademark of its owner. PLC Gym is independent and is not affiliated with or endorsed by its makers.