# Prefix App vs Xwhy

The clearest difference is in-app purchases: Xwhy at none against Prefix App's 2. Xwhy also leads on ads (none vs shown) and iOS requirement (13.4 vs 18.0). Prefix App's advantage is update cadence (every 3 weeks vs every 3 months). On price and device support there is nothing between them.

Both are free to download. Prefix App sells 2 one-off in-app purchases. Xwhy asks for nothing beyond the download.

Prefix App ships an update every 3 weeks, Xwhy every 3 months. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Prefix App | Xwhy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/prefix-app-new/id1140903469/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 37.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 13 MB | 16 MB |
| Requires iOS | 18.0 | **13.4** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alain Lima](https://appshunter.io/developer/789421888) | [GRAPE MEDIA](https://appshunter.io/developer/785344690) |

## What reviewers say

### Prefix App

[App page](https://appshunter.io/ios/app/prefix-app-new/id1140903469)

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:** macOS Compatibility, Family Sharing, Siri integration, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Call from Apple Watch | $0.99 | one-time |
| Remove ads | $1.99 | one-time |


### Xwhy

[App page](https://appshunter.io/ios/app/xwhy/id1613514035)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Prefix App free?

Prefix App is free to download, with in-app purchases available.

### Is Xwhy free?

Xwhy is free to download, with no in-app purchases.

### Do Prefix App or Xwhy have ads?

Prefix App shows ads; Xwhy does not.

### Which is updated more often, Prefix App or Xwhy?

Prefix App ships an update every 3 weeks, and Xwhy every 3 months. Most recently, Prefix App was updated on October 24, 2026 and Xwhy on October 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*