Comparison

PrefixPlus vs EDIFICE Connected

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

PrefixPlus

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.

Highlights
  • 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
Features
Read full 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.

About

EDIFICE Connected

This app connects your Bluetooth-enabled CASIO watch to your iPhone, enabling various Mobile Link functions. It simplifies watch operations through your phone and is transitioning to the CASIO WATCHES app.

Highlights
  • Bluetooth watch connectivity
  • Mobile Link functions
  • Simplified watch operations
  • Data transfer to CASIO WATCHES
  • Accurate time synchronization
Features
Read full description

Important - Please Read Request to Transfer to the CASIO WATCHES App (Support Termination Notification) The functionality of this app will be transferred to the new watch app, CASIO WATCHES. By updating to version 3.0, users of this app will be able to transfer their user data to CASIO WATCHES via this app. While we understand this may be inconvenient for some users, we ask that you transfer your data across, and continue using CASIO WATCHES in place of this app. Please see the support page for more details. https://world.casio.com/support/wat/info/20230322/en/ ●Description This is the basic application for connecting and communicating with a Bluetooth(R) v4.0 enabled CASIO watch. Pairing your watch with an iPhone enables use of a variety of different Mobile Link functions that greatly enhance the iPhone experience. The EDIFICE Connected app also simplifies certain watch operations by letting you perform them on your phone screen. Visit the website below for details. http://www.edifice-watches.com/ We recommend using EDIFICE Connected on the following operating systems. Operation is not guaranteed for any operating system not listed below. Even if an operating system has been confirmed as compatible, software updates or display specifications may prevent proper display and/or operation. ⋅ iOS 14 or later. Applicable Watches: ECB-800, ECB-900, EQB-1000, ECB-10, EQB-1100, ECB-20, ECB-S100, EQB-1200 *Some watches unavailable in your region may be displayed in the application. Please refer to the FAQ link below to resolve problems such as being unable to connect or operate the watch. https://support.casio.com/en/support/faqlist.php?cid=009001019 This application uses location information to obtain accurate time. For "Location Service" in iPhone privacy settings, please "Always". If it is not "Always", the application will not work properly. Continued use of GPS running in the background can dramatically decrease battery life.

Screenshots

PrefixPlus2 screens
EDIFICE Connected2 screens

Verdict

The call

The clearest difference is ads: EDIFICE Connected at none against PrefixPlus's shown. EDIFICE Connected also leads on monetization model (free vs ad-supported) and iOS requirement (11.0 vs 15.6). PrefixPlus's advantage is review sentiment (72% vs 39%). On price, rating, ratings volume and update cadence there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for PrefixPlus against 4.7 for EDIFICE Connected. Both are backed by a comparable volume of ratings — 1.1K and 590 respectively. Written reviews are what separate them: 72% of PrefixPlus's written reviews are positive against 39% of EDIFICE Connected's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

Scorecard4 real differences · 6 level
PrefixPlus versus EDIFICE Connected: the parameters behind the verdict, then further details
ParameterPrefixPlusEDIFICE Connected
PriceFreeFree
Rating4.7 (1.1K ratings)4.7 (590 ratings) — better
Positive reviews71.8% of reviews — better39.2% of reviews
Number of ratings1.1K — better590
Update frequencyEvery 2 monthsEvery 2 months
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.611.0 — better
Further details — not scored
Size8 MB212 MB
Age rating4+4+
Developeryasuhiko nagaharaCASIO COMPUTER CO., LTD.

Customer experience

PrefixPlus

All ratings1,056 ratings
Positive90.0%
Neutral6.0%
Negative4.1%
Written reviews71 reviews
Positive71.8%
Neutral8.5%
Negative19.7%

EDIFICE Connected

All ratings590 ratings
Positive93.9%
Neutral2.4%
Negative3.7%
Written reviews143 reviews
Positive39.2%
Neutral11.2%
Negative49.7%

User reviews

PrefixPlus

From 1.1K App Store ratings

What we love

  • 💡 Allows adding prefix numbers to contacts
  • 🚀 Efficient batch update of contacts
  • 👍 Convenient for users of MVNO services
  • 👍 Integrates well with default phone app

Room to improve

  • 🐛 Crashes or freezes when updating contacts
  • 🐛 Inconsistent or incomplete contact updates
  • 🔋 Potential for increased data usage or charges

EDIFICE Connected

From 590 App Store ratings

What we love

  • ⏱️ Accurate time synchronization
  • 🔗 Reliable Bluetooth connectivity (when working)
  • 👍 User-friendly interface design
  • 🌍 World time setting functionality
  • ⚡ Quick and easy setup process

Room to improve

  • 🐛 Frequent app crashes and freezing
  • 🔌 Unstable Bluetooth connection drops
  • ⚠️ Mandatory data collection and privacy agreements
  • 🌐 Missing language localization options
  • 📋 Confusing setup instructions

Bugs and requests

PrefixPlus

Reported bugs

3 issues
  • Crashes on iOS 13.3
  • Duplicate contact entries created
  • Prefix not applied to all contacts

Requested features

3 requests
  • Option to add space between prefix and number
  • Support for local/offline contacts
  • Ability to selectively update contacts

EDIFICE Connected

Reported bugs

14 issues
  • App crashes on launch (especially iPhone 13/14)
  • Bluetooth connection fails repeatedly
  • Watch model not found in app database
  • Time synchronization errors and mismatches
  • Date display visibility issues
Show 9 more
  • Phone finder feature non-functional
  • Charge level stuck at 50% or below
  • Auto-sync disconnects after 10 minutes
  • Hand position adjustment moves in opposite direction
  • ERR message appearing during sync
  • App incompatible with latest iOS versions
  • Privacy agreement checkboxes unresponsive
  • Bluetooth pairing mode not activating
  • World time settings not persisting correctly

Requested features

14 requests
  • Turkish language support
  • Ukrainian language support
  • Russian language localization improvements
  • Recurring alarms by day of week
  • Better battery/charge level indicator display
Show 9 more
  • Phone finder function working without app open
  • Support for ECB-30 model
  • Support for ECB-40 model
  • Unified single app for all Casio Bluetooth models
  • Background operation capability
  • Widget support for quick access
  • Improved time zone management controls
  • Calendar sync with Outlook
  • Better hand calibration controls

In-app purchases

None

PrefixPlus

No in-app purchases

None

EDIFICE Connected

No in-app purchases

Questions

Is PrefixPlus free?
PrefixPlus is free to download, with no in-app purchases.
Is EDIFICE Connected free?
EDIFICE Connected is free to download, with no in-app purchases.
Which has better reviews, PrefixPlus or EDIFICE Connected?
EDIFICE Connected is rated higher. PrefixPlus averages 4.7 out of 5 from 1.1K ratings, while EDIFICE Connected averages 4.7 from 590 ratings.
Do PrefixPlus or EDIFICE Connected have ads?
PrefixPlus shows ads; EDIFICE Connected does not.
Which is updated more often, PrefixPlus or EDIFICE Connected?
PrefixPlus ships an update every 2 months, and EDIFICE Connected every 2 months. Most recently, PrefixPlus was updated on November 6, 2026 and EDIFICE Connected on November 5, 2026.

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