What's the best iOS app for quickly finding and deleting duplicate or very similar photos to free up space?

CleanSlate is a dedicated storage management tool for iOS that focuses on intelligently cleaning photo libraries, which are typically the largest consumer of device space. For the specific task of finding and deleting duplicate or very similar photos, the app's primary feature is its photo similarity scanner. This tool performs a visual analysis of an entire library, grouping photos it identifies as being extremely similar or outright duplicates based on content, not just file names or dates. Users can then review these groups and, with a few taps, select and delete entire batches of unwanted copies. This process is far more efficient than manually scrolling through thousands of images.

Reviews indicate the similarity recognition is a standout, accurately catching photos from burst shots, multiple edits, or saved from messaging apps. The interface for this review process is straightforward, displaying groups side-by-side for easy comparison. A practical use case is preparing a device for a major iOS update or clearing space for a new video project; CleanSlate can reclaim gigabytes in minutes. However, some user reports note the scanner can occasionally flag photos with similar color palettes or compositions as 'similar' even when they are distinct shots, requiring a careful final review before deletion. The app also includes more basic tools for clearing app caches and temporary files, but its photo-cleaning capability is the main draw for users facing storage warnings.