PrefixPlus - add the prefix
PrefixPlus - add the prefix Summary
PrefixPlus - add the prefix is a ad-supported iOS app in Tools by yasuhiko nagahara. Released in Sep 2016 (9 years ago). It has 1.7K ratings with a 4.56★ (excellent) average. Based on AppGoblin estimates, it reaches roughly 7.1K monthly active users and generates around $<10K monthly revenue (0% IAP / 100% ads). Store metadata: updated Dec 23, 2025.
Store info: Last updated on App Store on Dec 23, 2025 .
4.56★
Ratings: 1.7K
Screenshots
App Description
PrefixPlus allows you to add the prefix number to phone numbers in Contacts at once.
Phone numbers with the prefix number will not be replaced but added to contacts.
For example, if you set the number "+81" and the label "Call(JP)", contacts will be updated as follows.
[Before update]
Home: 03-1234-5678
Mobile: 090-1234-5678
[After update]
Home: 03-1234-5678
Mobile: 090-1234-5678
Call(JP) Home: +81-3-1234-5678
Call(JP) Mobile: +81-90-1234-5678
(Caution)
Be sure to back up contacts as security against accidents. For example, if you back up to iCloud, you can restore contacts at some point in the past.
Please note that you can add prefix numbers to contacts synchronized with local, iCloud, Gmail only.