One of the fastest ways I have found to expand my business is to take existing listings and crosslist them to other platforms. I use List Perfectly to help me quickly crosslist on up to 11 platforms.
You can crosslist to eBay, Facebook Marketplace, Poshmark, Depop, Shopify, Kidizen, Mercari, Listing Party, Grailed, Etsy, Depop, Instagram and Vestiaire Collection.
Crossliting adds to my bottom line. I sell items faster on multiple platforms than on eBay alone. There are different customers on other platforms. On Mercari and Poshmark I sell items that have not gotten attention on eBay. List Perfectly worth my time and money.
There is not a mobile app however you can put a shortcut on your phone.
You can try List Perfectly for yourself use this link for 30% off your 1st month.
For more information on List Perfectly visit Learning Center