# Prefix App vs Offline Unit Converter

The clearest difference is iOS requirement: Prefix App at 7.0 against Offline Unit Converter's 15.0. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | Prefix App | Offline Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 48.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Monetization | Free | — |
| Size | 21 MB | 2 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alain Lima](https://appshunter.io/developer/789421888) | [Abid Rahim](https://appshunter.io/developer/1707542441) |

## What reviewers say

### Prefix App

[App page](https://appshunter.io/ios/app/prefix-app/id813922085)

Easily add a prefix to phone numbers before dialing without altering your contacts. Ideal for managing business phone lines or specific calling requirements directly from your address book or keypad.

**Highlights:** Full address book access, Customizable contacts, Recent calls list, Customizable prefix and suffix, Direct dialing via keypad, Intuitive interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Offline Unit Converter

[App page](https://appshunter.io/ios/app/offline-unit-converter/id6786961471)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Prefix App free?

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

### Is Offline Unit Converter free?

Offline Unit Converter is free to download, with no in-app purchases.

### Do Prefix App or Offline Unit Converter have ads?

Neither Prefix App nor Offline Unit Converter shows ads.

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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.*