KartingSource Listing App (KS Listing App) was developed by Gear-Source, Inc. the World's largest marketplace for used lighting, pro audio, and stage gear.

The KartingSource (KS) Listing App is a convenient and easy way to add items to your online listings directly from an iPhone or iPad, from any location, without needing a wireless connection (items will sync as soon as you have a wireless connection). Features include:

- secure access using your existing KartingSource.com® log-in
- access to your complete existing listings profile, including online and offline items
- add new listings to KartingSource.com® conveniently and easily
- take pictures of your items as you enter listings
- manage existing listings - modify the price, change the quantity, edit the description of any existing listings and add pictures
- reassign existing listings from offline to online or vice-versa, depending on whether the item is available for sale or not.
- modify your KartingSource.com® account profile
- add or edit shipping or billing addresses.

Listings added through the Listing App will be live on KartingSource.com® as soon as they go through the standard approval process.

KartingSource.com® will be the most comprehensive online marketplace for karting-related gear. Registered users can buy or sell almost anything related to karting through KartingSource.com®.