Comparison

Prefix Dialer Pro vs ContactFixer

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

Head to head
About

Prefix Dialer Pro

Automatically add dial codes or modify phone numbers before making calls. Ideal for office PBX systems, international dialing, or any situation requiring number reformatting. Sync rules across devices via iCloud.

Highlights
  • Automatic prefix and replacer rules
  • Contact integration
  • Clipboard detection
  • Manual number entry
  • Dial history
  • iCloud sync
  • Shake to open contacts
Features
Read full description

Prefix Dialer Pro lets you automatically prepend dial codes and transform phone numbers before placing a call — perfect for office PBX systems, international dialling, or any setup where numbers need a prefix. HOW IT WORKS Set up one or more prefix rules (e.g. "00" or "9") and replacer rules (e.g. strip the leading "+"). When you dial a number from your contacts, clipboard, or manually, every enabled rule is applied automatically. FEATURES • Contacts — pick any phone number directly from your contacts • Clipboard — detected automatically each time you open the app • Manual entry — type a number without opening your contacts • Dial history — quickly redial recent numbers • Shake to open contacts picker • iCloud sync — rules stay in sync across your devices • Up to 1 prefix and 1 replacer free; Go Pro for unlimited GO PRO A single one-time purchase unlocks unlimited prefixes and replacers and removes all ads. GREAT FOR • Staff who dial through a PBX (prepend 9 or 0 to get an outside line) • Frequent international callers (replace + with 00 or a country code) • Anyone whose phone system requires number reformatting before dialling

About

ContactFixer

This app automatically formats your US phone numbers into a consistent E.164 format, ensuring better compatibility with messaging and calling services. It scans your contacts, provides a preview of changes, and applies them instantly without needing an internet connection.

Highlights
  • Automatic US phone number formatting
  • E.164 format conversion
  • Preview changes before applying
  • Instant contact updates
  • Offline functionality
  • Privacy-focused, no data collection
Features
Read full description

ContactFixer solves a small but annoying problem: your iPhone contacts are a mix of formats. Some numbers have the +1 country code, some have area codes in parentheses, some are just ten raw digits. iMessage, FaceTime, and third-party apps all behave better when numbers are in a consistent E.164 format — and ContactFixer gets you there in seconds. HOW IT WORKS Tap Scan Contacts and ContactFixer reads through your entire contacts list, identifying every US phone number missing the +1 country code. It shows you a full preview — contact name, old number, and new number — before changing anything. When you're ready, tap Apply All Changes and every contact is updated instantly using Apple's native Contacts framework. WHAT GETS FIXED (708) 555-0142 → +17085550142 312-555-0198 → +13125550198 8005550167 → +18005550167 17085550031 → +17085550031 Numbers already beginning with + are never touched. Your international contacts stay exactly as they are. COMPLETELY PRIVATE ContactFixer has no backend, no account, no analytics, and no ads. It makes zero network requests — you can run it in airplane mode and it works identically. Your contacts are read and written using the same native framework Apple's own Contacts app uses. Nothing ever leaves your device. SIMPLE BY DESIGN There's nothing to configure. No settings, no subscriptions, no account to create. Scan, review, apply — done.

Screenshots

Prefix Dialer Pro4 screens
ContactFixer4 screens

Verdict

The call

The clearest difference is in-app purchases: ContactFixer at none against Prefix Dialer Pro's 2. ContactFixer also leads on update cadence (every 2 days vs every 8 months). On price, rating, ratings volume and ads 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. Prefix Dialer Pro sells 2 one-off in-app purchases. ContactFixer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Prefix Dialer Pro against 5.0 for ContactFixer. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

Prefix Dialer Pro ships an update every 8 months, ContactFixer every 2 days. The most recent releases landed on November 13, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 6 level
Prefix Dialer Pro versus ContactFixer: the parameters behind the verdict, then further details
ParameterPrefix Dialer ProContactFixer
PriceFreeFree
Rating5.0 (1 ratings)5.0 (2 ratings)
Number of ratings12 — better
Update frequencyEvery 8 monthsEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhoneiPhone, iPad — better
Requires iOS17.016.0 — better
Further details — not scored
Size4 MB1 MB
Age rating4+4+
DeveloperSOHO S & NJoe Wilson

In-app purchases

2 purchases

Prefix Dialer Pro

One-time2
  • Additional Set of 5 Prefixes and 5 Replacers$0.99
  • Set of 5 prefixes and 5 replacers$0.99
None

ContactFixer

No in-app purchases

Questions

Is Prefix Dialer Pro free?
Prefix Dialer Pro is free to download, with in-app purchases available.
Is ContactFixer free?
ContactFixer is free to download, with no in-app purchases.
Which has better reviews, Prefix Dialer Pro or ContactFixer?
Prefix Dialer Pro and ContactFixer are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Prefix Dialer Pro or ContactFixer have ads?
Neither Prefix Dialer Pro nor ContactFixer shows ads.
Which is updated more often, Prefix Dialer Pro or ContactFixer?
Prefix Dialer Pro ships an update every 8 months, and ContactFixer every 2 days. Most recently, Prefix Dialer Pro was updated on November 13, 2026 and ContactFixer on October 31, 2026.

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