There are two different client applications that allow you to acces the features of WorldWide Telescope. The Windows Client runs on a Windows PC or thru the use of a Windows VM or Boot Camp on the Mac. The Web Client is a browser-based version of WorldWide Telescope for Windows PC and Intel Mac OS X user.

The Web Client version of WorldWide Telescope offers a subset of the features from the WorldWide Telescope Windows® Client. Details on the feature sets for each release are outlined below.

Feature	Windows® Client	Web Client
Access to hundreds of terabytes of sky, earth and planet data	x	x
Ability to navigate seamlessly through 3D spherical environments	x	x
Finder Scope to quickly identify astronomical objects	x	x
Instant thumbnail previews of tens of thousands of popular astronomical objects	x	x
Access to billions of objects in web-based astronomical catalog	x	x
Loading tours, images and other WorldWide Telescope data files on local machine	x	x
Real-time positions of planets and moons	x	x
Move forwards and backwards in time 2000 years	x	x
View guided tours*	x	x (tours without Solar System View)
Browsing local user collections	x	x
Ability to change viewing location	x	x
3D Solar System View	x
View the orbits of hundreds of moons in the Solar System	x
View Asteroids and Minor planets in 3D	x
3D navigation of stars, Milky Way and cosmos	x
Copy shortcuts to the Sky	x	x
Easy image alignment for user-imported images	x
Ability to author/edit guided tours	x
Localized versions available	x
Terrain/elevation model	x
Offline mode	x
Touch controls enable touch-screen or mouse only navigation	x
XBOX controller/3D connection	x
Professional features
Virtual Observatory Cone search/registry look up and SIMBAD search	x	x
Load and Adjust basic FITS images and AVM files	x	x
SIAP with footprint preview	x	x
Connect your Telescope to WWT	x	x
Multi-monitor cluster rendering	x
Visualization of large scale structure	x
SAMP Inter-application communication	x
Full dome projection	x
Multi-projector calibration system	x
Brodcast snapshots of desktop applications to a full dome window	x
Load and View Dome Master and Panoramic Images	x
Add-in for Excel (import and visualize spreadsheet event data)	x
Add and view new orbits	x
Add and view trajectories – such as Halley’s comet or Voyager 2	x
Add and view layer data – events, shape files, models, images	x
Import data from custom applications written using the LCAPI (a custom set of API calls)	x
Create guided tours with layers, smooth transition and animated text	x
Render discrete video frames (for import into video editing systems)	x
Render frames in Dome Master (up to 4k)	x
Integrate and customize the WWT control in your website		x
One Click Access from Flikr Astrometry tagged images		x

The WorldWide Telescope Web Client runs on HTML5. Performance will vary based on processor speed, RAM, Graphics card and window size.