Undolly 4 is an iPhone photo and video cleanup app built around a “swipe-to-clean” experience: swipe right to keep, swipe left to delete. Designed for iOS 26+, it offers 12 cleanup modes to help users deal with space-hogging items such as similar photos, large videos, screenshots, WhatsApp/Telegram media, screen recordings, RAW files, GIFs, and more.
Its core AI capabilities focus on handling similar and duplicate photos. For each duplicate photo group, the app scores images across more than 10 attributes, including sharpness, facial expression, open eyes, composition, subject, exposure, whether the image is favorited or edited, burst shots, and more. It then highlights the recommended “best photo.” Importantly, Undolly does not automatically make the decision for the user; final confirmation is still required, which is crucial for reducing the risk of accidental deletion. For videos, it can identify large videos suitable for compression, supports background batch queue processing, claims compression of up to around 50%, and shows how much space can be freed for each video.
Privacy is a clear selling point for Undolly: the main copy repeatedly emphasizes that photos and AI analysis are handled 100% locally on the device and are not uploaded to the cloud. Its terms also state that users are responsible for backing up their photos and reviewing deletion suggestions themselves. Pricing information is limited: it only states that a free trial is available, followed by either a subscription or a one-time lifetime purchase, with no specific prices disclosed. The app is available only through the App Store and requires iOS 26+, which sets a relatively high platform barrier.
Its strengths include lightweight interaction, broad cleanup category coverage, more explainable AI recommendation criteria, and retained manual confirmation. It is especially useful for users with tens of thousands of photos, many duplicate burst shots, and accumulated chat images. The downsides are that AI recognition is not 100% accurate, and users still bear the risk of deletion; pricing, Chinese language support, and customer support details are not fully disclosed; and it cannot serve Android users or those on older versions of iOS.
Access from mainland China is not specified in the main copy. Since it is distributed via the App Store, whether users can download, try, and pay for it depends on their App Store region and Apple account payment conditions. If it is unavailable, alternatives include the built-in duplicate cleanup feature in iOS Photos, CleanMyPhone, Gemini Photos, Slidebox, or domestic photo cleanup tools.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on undolly.app official site.
undolly.app is an Unknown AI Apps provider. TG4G tracks its product information, an overall rating of 7.0/10, and a China-accessibility score of China direct-connect friendly. Click "Visit Official Site" to reach undolly.app directly.