# ContactKeeper: Contacts Backup — Backup, Export & Restore > Backup, Export & Restore (iPhone/iPad app by Martin Rost.) - Source: https://appshunter.io/ios/app/contactkeeper-contacts-backup/id6739183747 (this page in markdown: same URL + `.md`) - Developer: [Martin Rost](https://appshunter.io/developer/1784102682) - Category: Utilities, Productivity - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 26.0 · 9 MB - Languages: English, German - Released: 2026-02-17 - Data updated: 2026-10-24 ## What is ContactKeeper? Find and merge duplicate contacts, then back up your address book – completely offline on your iPhone. ContactKeeper detects duplicates by name, phone number and email. Before you merge, back up everything as vCard, CSV or JSON. No cloud, no account, no subscription. FIND DUPLICATE CONTACTS – FREE • Finds duplicate contacts automatically and shows you how many there are • Compares name, phone number and email – not just identical names • Two people with the same name but different numbers stay separate • Merge with Premium: automatically or confirm each case yourself • On import: detects existing contacts and fills in what's missing instead of creating new duplicates BACK UP & EXPORT • Export contacts as CSV, vCard (.vcf) or JSON • Select individual contacts or all at once • Share via AirDrop or email, or save to iCloud Drive IMPORT & RESTORE • Restore contacts from CSV, vCard or JSON • Preview before import – you decide what to keep • Transfer contacts to a new iPhone • Multiple encodings (UTF-8, Windows-1252, ISO-Latin1) GROUPS • Create and manage contact groups • Export entire groups at once PRIVACY • Your contacts are processed only on your device and never sent anywhere • No cloud uploads, no servers, no account • No tracking • Privacy-friendly usage stats via TelemetryDeck (no personal data) GET STARTED FOR FREE • Find duplicate contacts • Export single contacts • Export up to 50 contacts as CSV • CSV import included PREMIUM – ONE-TIME PURCHASE, NO SUBSCRIPTION • Merge duplicate contacts • Unlimited export, all formats (CSV, vCard, JSON) • Merge contacts during import • Manage & export groups For iPhone, iPhone Duo and iPad. Requires iOS 26 or later. Privacy: https://www.contactkeeper.de/en/privacy ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | ContactKeeper Premium | $6.99 | one-time | ## Is ContactKeeper safe? Not enough ratings yet to assess ContactKeeper. ## Is ContactKeeper legit? ContactKeeper: Contacts Backup appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for ContactKeeper is 65 out of 100 points across 7 verification signals from App Store and developer data. ## Version history (last 5 releases) ### 2.4 — 2026-10-23 New in version 2.4: • Ready for iPhone Duo: ContactKeeper uses both displays, and toolbars sit at the side on the outer display. • Find duplicate contacts for free: see right away how many duplicates your address book has. Merging stays part of Premium. • Better in landscape: onboarding, the purchase screen and export bars now fit sideways too. ### 2.3 — 2026-09-03 New in Version 2.3: MERGE CONTACTS INSTEAD OF CREATING DUPLICATES When importing, ContactKeeper now recognizes which contacts are already in your address book. Instead of creating duplicates, missing details — phone numbers, email addresses, postal addresses — are added to the existing contact. Your existing data stays untouched: nothing is overwritten, nothing is deleted. This matters most when restoring your own backup: your address book no longer doubles in size. NEW IMPORT PREVIEW Before importing, you see exactly what will happen — which contacts will be created, which ones already exist, and what will be added to them. You decide for each contact individually. VCARD IMPORT KEEPS MORE DATA Birthdays, websites, nicknames, social profiles, and contact photos are no longer lost when importing vCard files. Detecting contacts you already have is free. Merging them is part of Premium. ### 2.2 — 2026-03-10 New in Version 2.2: - Improved error handling for purchases and restores - Premium status now displays correctly offline - File size limit on import for better security - Temporary files are automatically cleaned up - Improved accessibility (VoiceOver & Dynamic Type) - Under the hood improvements ### 2.1 — 2026-02-23 New in Version 2.1: - All-new Liquid Glass design for iOS 26 - English language support - Home screen widget - Improved duplicate detection - Import preview before restoring - Export/import success confirmations ### 2.0 — 2026-02-16 Neu in Version 2.0: - Komplett neues Design mit Liquid Glass - Englische Sprachunterstützung - Home-Screen Widget - Verbesserte Duplikaterkennung - Import-Vorschau - Erfolgsbestätigungen bei Export/Import ## Apps similar to ContactKeeper | App | Rating | Price | Category | | --- | --- | --- | --- | | [TwinContacts](https://appshunter.io/ios/app/twincontacts/id6764562942) | — | Free | Utilities | | [Contacts to Any Format](https://appshunter.io/ios/app/contacts-to-any-format/id6781192183) | — | Free | Utilities | | [Handytester](https://appshunter.io/ios/app/handytester/id6476065309) | — | Free | Utilities | | [Contact Backup & Export Secure](https://appshunter.io/ios/app/contact-backup-and-export-secure/id6764262875) | — | Free | Utilities | | [Kontakt Export – vCard & CSV](https://appshunter.io/ios/app/kontakt-export-vcard-and-csv/id6761031688) | — | Free | Utilities | | [Contact Backup:Import & Export](https://appshunter.io/ios/app/contact-backupimport-and-export/id1492958197) | — | Free | Utilities | ## More apps by Martin Rost - [Prepora – Crisis Readiness](https://appshunter.io/ios/app/prepora-crisis-readiness/id6761617602) - [Sylph: Breathwork & Meditate](https://appshunter.io/ios/app/sylph-breathwork-and-meditate/id6763370211) All apps by Martin Rost: https://appshunter.io/developer/1784102682 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*