★★★★★ Essential mobile “Traveller’s” Aid by Barbierossa – May 25, 2017

Does exactly what you expect it to do! Need an off the cuff sector of space? Boom! Done! Brilliant!

Sector is a mapping tool for classic tabletop Science Fiction Roleplaying games.

With a single click Sector will generate an entire sector (16 subsectors) of worlds for you and your players to explore.

That’s not all - the map is editable! Tap the ‘Edit’ button and then tap hexes to remove a world you don’t want, or add a world to a blank hex. Trade routes and cluster names are generated on the fly.

Note: requires the use of an RPG rules system. Contains materials from the Traveller SRD document

Note: Mapping an entire sector is resource intensive. Recommended for iPad Pro and iPhone 6s devices or better.

I wrote a bit more about the motivation behind Sector here

iPhone Screenshot

iPad Screenshot

Sector for Mac

At the moment I don’t have plans to build a full GUI Mac app - although I would like to do this. Instead, you can download a completely free command line tool here - there’s no warranty or anything else provided - use at your own risk, but it should be pretty safe!

To call it, just open the terminal and cd to the same directory, and then run ` ./sector` - at the moment there are no options, it will just spit out and entire random sector listing! On the plus side, it’s very fast.

Tips and tricks

Release notes


This is a major update that improves efficiency and reduces crashes.


You can now save your generated sector maps as a PDF! Use the share icon when viewing the map and select ‘PDF’ as the file format. You can still also share as a plain text file world listing, and as a native Sector file format.


Adds a small navigator thumbnail view in the navigation bar, so you always know what part of the map you’re looking at. Also, reverts back to showing a zoomed in version of the map initially



Adds a map legend to help explain the colours used in the map, and what they mean. Minimum OS version increased to 10.3