Comparison

Calling Card vs Prefix App

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

Head to head
About

Calling Card

This app helps you save money on international calls by managing calling cards and carrier prefixes. It can automatically select the best card for you based on the number you dial. It also supports PBX routing and Skype To Go calls.

Highlights
  • Manage multiple calling card accounts
  • Automatic card selection
  • Dial from contacts or recent calls
  • Support for international prefixes
  • Flexible call detail setup
  • Display local time for contacts
Read full description

The ultimate iPhone calling card/IDD dialing application - save money when calling contacts from your iPhone by using one or more cards or carrier prefixes to get the best rates - even have the application automatically select the best card for you based on the selected number. Save money on all your international calls using the most popular calling card application for the iPhone. The application can also be used to route calls through a PBX system (no actual calling card required) or for Skype To Go calls. Main features: • Set up multiple phone/calling card accounts and easily switch between them - support for multiple access numbers per card. • Automatic card selection based on contact and/or number prefix. • Set up a list of favorite numbers to dial, select any number from your contacts, call a number from the recent calls placed from the application, or directly enter a phone number to be dialed. • Full support for international prefixes (numbers starting with '+'). • Flexible call details setup allows for automatic dialing of most phone cards even if intermediate menu selections have to be made. • Display local time for contact to be called (time zone lookup based on the phone number) - support for all international numbers. • Card definitions can be shared between different devices via simple email export/import. –––––––––––––––––––––– Winner "iPhone Apps Excellence Award for 2008" (iPhonefootprint.com)!

About

Prefix App

Easily add prefixes to phone numbers without altering your contacts. Ideal for business users, it offers extensive customization for prefixes and your address book. Includes Siri and Apple Watch support for seamless integration.

Highlights
  • Add prefixes without editing contacts
  • Multiple customizable prefixes
  • Full and customizable address book
  • Recent calls list
  • Siri support
  • Today widget and Apple Watch app
Features
Read full description

Prefix App lets you put a prefix (or suffix) before any phone number without editing your address book. Perfect for business phones and special carrier plans. FEATURES • Full address book • Multiple customizable prefixes • Customizable suffix • Favorites • Recent calls • Direct call from the keypad • Today widget • Apple Watch app • SIRI support • Simple, intuitive and smart interface No more editing contacts or retyping numbers by hand!

Screenshots

Calling Card4 screens
Prefix App4 screens

Verdict

The call

The clearest difference is price: Prefix App at Free against Calling Card's $1.99. Prefix App also leads on rating (5.0 vs 3.2) and update cadence (every 3 weeks vs every 3 months). Calling Card's advantage is in-app purchases (none vs 2) and ads (none vs shown). On ratings volume and device support 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

Prefix App is free to download; Calling Card costs $1.99 up front. Prefix App sells 2 one-off in-app purchases. Calling Card asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Prefix App holds the better App Store score, 5.0 against 3.2. Both are backed by a comparable volume of ratings — 6 and 3 respectively. Written reviews complicate that: 62% of Calling Card's written reviews are positive against 37% of Prefix App's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Calling Card ships an update every 3 months, Prefix App every 3 weeks. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

Scorecard8 real differences · 2 level
Calling Card versus Prefix App: the parameters behind the verdict, then further details
ParameterCalling CardPrefix App
Price$1.99Free — better
Rating3.2 (6 ratings)5.0 (3 ratings) — better
Positive reviews62.4% of reviews — better37.3% of reviews
Number of ratings6 — better3
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS11.0 — better18.0
Further details — not scored
Size3 MB13 MB
Age rating4+4+
DeveloperAndreas AmannAlain Lima

Customer experience

Calling Card

All ratings6 ratings
Positive50.0%
Neutral16.7%
Negative33.3%
Written reviews141 reviews
Positive62.4%
Neutral12.1%
Negative25.5%

Prefix App

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews51 reviews
Positive37.3%
Neutral15.7%
Negative47.1%

Bugs and requests

Calling Card

Reported bugs

13 issues
  • Duplicate contact creation with dialing codes
  • App crashes on iOS 3.1, 4.x, 7.x and later versions
  • Cannot input # or * characters in custom numbers
  • Hangs when selecting contacts from list
  • Ignores pause (,) between numbers
Show 8 more
  • Inconsistent dialing speed and timing
  • Freezes on last entered phone number
  • Doesn't work with certain calling card providers
  • Corrupts Google Contacts and removes custom ringtones
  • Bypasses calling card and makes direct international calls
  • Adds unwanted comma between prefix and number
  • First call fails but second call works
  • Doesn't work with Rogers, Topup, and other specific cards

Requested features

13 requests
  • Support for # and * character input
  • Voice activation/VoiceOver compatibility
  • Direct dialing from contacts app
  • Faster DTMF dialing speed
  • Favorites-only contact selection
Show 8 more
  • Multiple PINs per card
  • Bluetooth headset compatibility
  • GPS-based access number selection
  • Option to not modify contact list
  • Shorter pause durations
  • Default to home screen after call
  • Pause and Wait functionality
  • Integration with address book as default dialer

Prefix App

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Calling Card

No in-app purchases

2 purchases

Prefix App

One-time2
  • Call from Apple Watch$0.99
  • Remove ads$1.99

Questions

Is Calling Card free?
Calling Card costs $1.99, with no in-app purchases.
Is Prefix App free?
Prefix App is free to download, with in-app purchases available.
Which has better reviews, Calling Card or Prefix App?
Prefix App is rated higher. Calling Card averages 3.2 out of 5 from 6 ratings, while Prefix App averages 5.0 from 3 ratings.
Do Calling Card or Prefix App have ads?
Prefix App shows ads; Calling Card does not.
Which is updated more often, Calling Card or Prefix App?
Calling Card ships an update every 3 months, and Prefix App every 3 weeks. Most recently, Calling Card was updated on November 6, 2026 and Prefix App on November 4, 2026.

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