Thumbnail Maker: Banner Art is an application that can help you create stunning channel arts and thumbnails for your YouTube videos. Available for iPhone, this app is easy to use and comes with a variety of features that will make your thumbnails stand out.

One of the best features of Thumbnail Maker: Banner Art is the huge selection of backgrounds available, with over 1000 options to choose from. You can also import your own backgrounds for a more personalized touch. Additionally, the app offers over 100 typography fonts to choose from, allowing you to add a unique style to your thumbnails and channel art.

Another great feature is the ability to add stickers to your thumbnails, making them more eye-catching and fun. The app also includes 30+ professionally designed filters to enhance the visual appeal of your thumbnails.

Overall, Thumbnail Maker: Banner Art is a great tool for YouTubers who want to create professional-looking thumbnails and channel art. It should be noted, however, that the app offers auto-renewing subscription options after a 3 day trial period, with a weekly option for $3.99 or an annual option for $39.99.