Fast Cleaner: Clean Storage is a free iPhone app developed by 美肖 曹. It falls under the Lifestyle category and aims to assist users in freeing up space on their devices by removing temporary files, similar photos, and duplicate contacts.

The app offers several key features to help optimize device performance. It includes a "Save Battery Life" feature that detects and closes background applications consuming battery power, thereby increasing the standby time of the phone. Additionally, Fast Cleaner allows users to delete unnecessary temporary files, clean storage, and free up space, which ultimately improves device performance.

One of the standout features of Fast Cleaner is its ability to scan and delete similar screenshots, identical images, photos, and videos. This feature helps users efficiently manage and organize their media files, ensuring they only keep what is necessary.

Furthermore, the app offers a convenient "Remove Duplicate Contacts" feature that helps users declutter their contact list by removing duplicate entries.

Fast Cleaner: Clean Storage also provides subscription options for users who wish to unlock all functions of the app. The auto-renewing subscription options are priced at $7.99 per month or $29.99 per year.

Please note that users should review the Terms of Use and Privacy Policy provided by the developer for more information on data usage and subscription details.

Overall, Fast Cleaner: Clean Storage is a useful tool for iPhone users looking to optimize their device's performance and free up valuable storage space.