改行くん is a free Android application developed by Shintaro Morikawa under the Social and Communication category. The app is designed to help users format their texts and avoid using symbols such as "*" or "." when posting photos or texts on social media platforms. The app is straightforward and easy to use; users only need to enter the text they want to post, click the "Copy Text" button, and paste it into the social media app they want to post in.

It's a handy tool for those who want to make sure their texts are well-formatted and readable. However, it's important to note that changes in the specifications of the social media app may affect the formatting of the text. Overall, if you're looking for a simple and effective way to format your texts, 改行くん is definitely worth trying out.