Apps are growing in popularity and there are now a few platforms in which you can use to download an app for a particular program or company. Apple, Microsoft and Android all have stores where these apps can either be purchased or even downloaded for free.
If you are looking to have an app created for your company then you need to consider what is the main point of it from your customers pint of view. It may be that you have a delivery service and want people to be able to schedule and track deliveries on the go. For this type of business an app would be extremely useful but you will probably find that you cannot really charge for it so could possible make money possibly by selling advertising space on there.
An app can just be essentially a mobile version of your website, but consider if anyone will want to download it using up vital space on their phone rather than just visiting your site. You can often send notifications through to your app users phone (if they allow it) informing them on a new product or service or a recent news article that you want to share.
Make sure you do plenty of research before going down this route to find out exactly what you wish to gain from it and what is right for your business needs.