Which app are you referring to? Both Android Central apps have been updated this year, and are free. This is an enthusiast site, so it's unlikely you'll find any direct resolution here. The best I could suggest would be to find the app in Google Play and use the links at the bottom to visit the developer website or send them an email to ask about the app. It may also help to look them up on Facebook (some developers even have their Facebook page as their website listing) and reach out to them that way.
When it comes to judging if an app is stale or worth the price, I just consider what it does. If it functions for my needs and doesn't have a major bug, I'm ok if it's not updated. Because there is no reason to update.