Easily add international or custom prefixes to all your phone numbers in contacts simultaneously. This utility helps manage multiple contact entries for different calling regions without overwriting existing numbers. Ensure you back up your contacts before use.
Reviews of PrefixPlus are mostly positive: the Utilities app is rated 4.7/5 from 1.1K App Store ratings. What users like most: allows adding prefix numbers to contacts, efficient batch update of contacts. Top complaints: crashes or freezes when updating contacts, inconsistent or incomplete contact updates. Summarized from real user reviews.
26.0.1
December 23, 2025
・Fixed an issue where deleting a prefix setting did not delete the corresponding contact.
3 issues
Crashes on iOS 13.3
Duplicate contact entries created
3 requests
Option to add space between prefix and number
Support for local/offline contacts
PrefixPlus allows you to add a custom prefix number to all your phone numbers within your contacts simultaneously. It creates new entries with the added prefix rather than overwriting your existing phone numbers, ensuring your original data remains intact.
You specify a prefix number (e.g., '+81' for Japan) and an optional label (e.g., 'Call(JP)'). The app then duplicates your existing phone numbers in contacts and prepends the specified prefix and label to these new entries, making it easy to dial with the correct international code.
Yes, the app is free to use. It is supported by advertisements, which you will see within the application.
The app can add prefix numbers to contacts that are synchronized with local storage, iCloud, or Gmail. Contacts not synchronized through these methods may not be updated.
It is strongly recommended to back up your contacts before using PrefixPlus. This is a security measure against any accidental data loss. You can typically restore your contacts from a previous backup, such as one made with iCloud.
