# Contacts Prefix Fixer vs JONAVA

The clearest difference is update cadence: JONAVA at every 2 months against Contacts Prefix Fixer's every 14 months. Contacts Prefix Fixer's advantage is iOS requirement (12.0 vs 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.

Contacts Prefix Fixer ships an update every 14 months, JONAVA every 2 months. The most recent releases landed on June 9, 2026 and August 2, 2026 respectively.

## The numbers

| Metric | Contacts Prefix Fixer | JONAVA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/contacts-prefix-fixer/id1635039737/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 2 months** |
| Monetization | Free | — |
| Size | 29 MB | 87 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cuong Luu Hung](https://appshunter.io/developer/1634793639) | [Jonavos rajono savivaldybė](https://appshunter.io/developer/1653608089) |

## What reviewers say

### Contacts Prefix Fixer

[App page](https://appshunter.io/ios/app/contacts-prefix-fixer/id1635039737)

Easily edit the prefix number for your contacts. Add country codes or other prefixes to all your phone numbers in one go. This utility simplifies managing international or specific dialing formats for your contacts.

**Highlights:** Edit contact phone number prefixes, Add country codes, Batch prefix modification, Easy to use interface

**Features:** macOS Compatibility

**In-app purchases:** none


### JONAVA

[App page](https://appshunter.io/ios/app/jonava/id6444289331)

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

**In-app purchases:** none


## Frequently asked questions

### Is Contacts Prefix Fixer free?

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

### Is JONAVA free?

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

### Do Contacts Prefix Fixer or JONAVA have ads?

Neither Contacts Prefix Fixer nor JONAVA shows ads.

### Which is updated more often, Contacts Prefix Fixer or JONAVA?

Contacts Prefix Fixer ships an update every 14 months, and JONAVA every 2 months. Most recently, Contacts Prefix Fixer was updated on June 9, 2026 and JONAVA on August 2, 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.*