Contact Cleaner

Contact Cleaner is a free, privacy-first app that finds and removes duplicate contacts from your Android phone. It scans your address book for contacts sharing the same phone number and lets you review and delete them safely.

KEY FEATURES:

• DUPLICATE DETECTION BY PHONE NUMBER

The app scans all your contacts and groups together any that share the same phone number, even if they have different names. Phone numbers are normalized using Google's libphonenumber library, so different formats like +234 802-636-7336, 08026367336, and 2348026367336 are all recognized as the same number.

• CANONICAL PHONE NUMBER CLEANUP

For every distinct phone number, exactly one copy survives. If a contact has the same number listed multiple times (with or without country code, with or without + prefix), only one instance is kept. Different phone numbers under the same contact are preserved.

• MULTI-ACCOUNT SCANNING

Choose which accounts to scan: Google, Samsung, Outlook, WhatsApp, Telegram, local Phone storage, and more. Scan one account, several, or all of them together. Your selection is remembered next time.

• SMART WINNER SELECTION

For each group of duplicates, the app picks the best contact to keep based on completeness: photo, email, birthday, notes, company, and extra phone numbers. Ties are broken by keeping the oldest contact.

• REVIEW BEFORE DELETE

Nothing is deleted without your approval. Go through each duplicate group, see all the contacts and their phone numbers, and tap to select which numbers to keep or delete. Each phone number is listed individually with a checkbox.

• AUTOMATIC SAFETY BACKUP

Before any contact is deleted, the app creates a backup of all affected contacts. This backup is saved to your Downloads folder so you can restore anything even after uninstalling the app.

• FULL CONTACT EXPORT

Backup your entire contact list to switch devices. Choose from VCF (industry standard), CSV (Excel), or plain text format.

• RECOVER SCREEN

View all your saved backups in one place. Share or delete backups individually. The 10 most recent backups are kept.

• REAL-TIME SCANNING PROGRESS

Watch the scan happen live with a progress bar showing how many contacts have been processed.

• COMPLETELY PRIVATE

Contact Cleaner has NO internet permission. All scanning, backup, and deletion happens locally on your device. No analytics, no ads, no tracking.

• INTERNATIONAL NUMBER SUPPORT

Uses your SIM card country code for accurate phone number parsing. Handles contacts from different countries correctly.

HOW IT WORKS:

1. Tap Scan Duplicates and choose which accounts to scan

2. The app reads your contacts and groups duplicates by phone number

3. Review each group and confirm which contacts and phone numbers to delete

4. A safety backup is created automatically before deletion

5. The app removes only the duplicate phone numbers you approved

6. Your address book is now clean

PERMISSIONS:

- READ_CONTACTS: to scan your contacts for duplicates

- WRITE_CONTACTS: to delete the duplicates you approve

- GET_ACCOUNTS: to list accounts so you can choose which to scan

Contact Cleaner is free, ad-free, and will always be. Your contacts stay yours.