ShowTool LD is a comprehensive suite of Lighting Design and Electrics utilities for theatre and film.

Quickly calculate and visualise beam angles, throw and beam diameter.

Calculate the number of cuts and wastage from all major gel manufacturers and stock sizes. Choose from a selection of standard frame sizes, or define your own custom frame size.

Translate between universe/address and absolute address, discover how many fixtures will fit within a universe and calculate dip switch configuration.

Simple power calculations in single and three phase configurations. Discover the total power consumption for your rig.

What is a subnet? Easy tools to discover valid addresses for devices on your lighting network.

Lists are kept in sync across all your devices using iCloud.

Ratings and Reviews

JohnDelfino ,


What the app claims to do, it does quickly and well. Can't ask for much more than that.

Would I mind more features? No. But I'd rather less features that are more polished and work perfectly than a ton of stuff thrown together that barely works.

I think the price is slightly steep considering most of this can be done with free apps as well, but there is value in dependability.

Don't be afraid to add more stuff in the future, though, dev.

ArataTakú ,

Very useful for anyone who works in Show and Event Lighting

I was weary before buying the bundle (ShowTool LD & Swatch apps). After purchasing them, I can confirm they are very helpful and well designed apps. You won't regret getting either app!

Great app for Lighting Designers, Directors, Technicians and Master Electricians.

Even if you know how many gel cuts can be made from a full Lee sheet or how to calculate beam throws, this app gives you easier and quicker onsite methods. It's much cleaner and organized to plug in numbers than to type an equation into a calculator.

AaronCole ,

Great app!

This is a great app! I love having the dip switch calculator. I bought the app for that reason but now use it for so many things. Makes my job so much better.

App Privacy

The developer, Daniel Murfin, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

You May Also Like