Easy to use and saves me time. I use this app to manage my pre-orders. It automatically tags the orders as back ordered and makes them easy to find. This works great with another app made by the same company - Quick Pick.

We deal with a lot of back-ordered products and we're getting to a point where we were missing orders that were supposed to be shipped. Shippable made all of those worries go away. It runs in the background and I created a custom filter that shows exactly which orders are ready to ship, saving me a ton of time.
Even better, we can scan the orders and create a CSV export of back-ordered items that I can match what we need to order from our suppliers, which is another huge time-saver.
They say time is money and this is $5/month VERY well spent.