What's the best Android app for automatically finding and merging duplicate contacts?

Contacts is a specialized app designed to tackle the common frustration of duplicate contacts, which often accumulate after syncing data from multiple sources like email, social media, or device transfers. It employs a scanning algorithm that cross-references names, phone numbers, and email addresses to identify duplicates with reasonable accuracy. For instance, when users upgrade phones or combine work and personal accounts, this app simplifies the cleanup process through a one-tap merge function that consolidates information without losing details. Real-world scenarios include managing contacts imported from outdated backups or merging entries from various apps, where manual editing would be tedious. Reviews indicate that users appreciate the time saved, with many reporting that what used to take hours now completes in minutes. However, some limitations exist: a few users note occasional false positives in duplicate detection, requiring manual verification, and the interface can feel slightly cluttered with advanced options. Despite these minor imperfections, Contacts integrates smoothly with Android systems and offers cloud backup for secure storage. Its balance of automation and control makes it a reliable choice for maintaining an organized contact database.