Don! is an Android app developed by ナカケン88 that allows you to add focus lines to your photos and images. With this app, you can create an effect similar to Manga, where the lines focus on the center of the image.

To use Don!, simply tap the gallery icon located at the lower left corner of the screen. From there, you can choose a photo or image from your device's gallery. After selecting your desired image, you can choose the line color and save the edited photo.

It's important to note that when you add focus lines to a new image, it may become smaller than the original. Additionally, if you choose a large image, there is a possibility of encountering memory errors. In such cases, it is recommended to select a smaller image. Furthermore, if you choose an image multiple times, memory errors may occur. If this happens, simply restart the app to resolve the issue.

Don! is a free app available for Android devices. It falls under the category of Multimedia and specifically belongs to the Photography subcategory. With Don!, you can easily enhance your photos and images by adding eye-catching focus lines.