The first thing you should think about is if the app makes it easy to find products that can be credibly sold with a high enough profit margin. Secondly, you should make sure that the app features suppliers that are located in or close to your target market, so that you are able to offer your customers quick shipping times. And thirdly, it is good to compare the costs of the different apps: some dropshipping apps are free, while others might cost more than $50/month.