Good
Good
stupid app
waiting to delete and cannot delete once you added
Ok
Good
一応
上手くいった。
何度広告を見ても更新されない
広告を何回見ても更新されない。
×印を押しても広告が消えず更新もされない。
×印を押しても広告が消えず更新もされない。
Free
With Ads
About
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.
✓Add prefixes to multiple contacts at once
✓Does not overwrite existing numbers
✓Customizable prefix numbers
✓Customizable label for new entries
✓Supports iCloud and Gmail synchronized contacts
Show original description
What users say
Summarized from real user reviews of PrefixPlus. Based on 1.1K reviews and a 4.7/5 average, it highlights the 4 positives and 3 negatives reviewers mention most about this Utilities app.
Positive things
- 💡Allows adding prefix numbers to contacts
- 🚀Efficient batch update of contacts
- 👍Convenient for users of MVNO services
- 👍Integrates well with default phone app
Negative things
- 🐛Crashes or freezes when updating contacts
- 🐛Inconsistent or incomplete contact updates
- 🔋Potential for increased data usage or charges
What's New in PrefixPlus
26.0.1
December 23, 2025
・Fixed an issue where deleting a prefix setting did not delete the corresponding contact.
User reviews
User experience
🐞
Reported Bugs
3 issues
Crashes on iOS 13.3
Duplicate contact entries created
✨
Requested Features
3 requests
Option to add space between prefix and number
Feature
Support for local/offline contacts
Feature
FAQ
What does PrefixPlus do?
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.
How does adding a prefix work?
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.
Is PrefixPlus free to use?
Yes, the app is free to use. It is supported by advertisements, which you will see within the application.
What kind of contacts can be updated?
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.
What should I do before using PrefixPlus?
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.
