# Onebox vs Adjoltz

The clearest difference is device support: Onebox at 3 against Adjoltz's 1. Onebox also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Onebox ships an update every 4 weeks, Adjoltz every 3 weeks. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Onebox | Adjoltz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (46 ratings)](https://appshunter.io/ios/app/onebox-virtual-phone-system/id338908820/reviews)** | — |
| Number of ratings | **46** | — |
| Positive reviews | 35.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 202 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [J2 Web Services, Inc.](https://appshunter.io/developer/1496258416) | [Jaganathan Konar](https://appshunter.io/developer/1896388373) |

## What reviewers say

### Onebox

[App page](https://appshunter.io/ios/app/onebox-virtual-phone-system/id338908820)

This app provides a virtual phone system for small businesses, enabling VoIP calling, reliable notifications, and smart call handling on mobile devices. It offers enhanced contact management and detailed call logs for better business communication.

**Highlights:** VoIP calling within the app, Reliable push notifications, Enhanced shared contact management, Flexible call routing and handling, Detailed call logs, Voicemail transcription and messaging, Custom greeting for incoming calls

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Fast performance
- 💡 Caller ID customization
- 💡 Call recording feature
- 💡 Faxing capability

**What reviewers complain about**

- 🐛 Frequent crashes
- 🐛 App freezes
- 🐛 Unreliable functionality
- 🐛 Poor call quality
- 🐛 Notification issues

**Reported bugs**

- Outgoing calls not working
- App freezes during calls
- Sound notification not working
- Texting not working or slow
- App doesn't ring phone

**Requested features**

- Email functionality
- Individual extension login
- Improved notification system
- Call transfer feature
- Dark mode


### Adjoltz

[App page](https://appshunter.io/ios/app/adjoltz/id6790163326)

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

**In-app purchases:** none


## Frequently asked questions

### Is Onebox free?

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

### Is Adjoltz free?

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

### Do Onebox or Adjoltz have ads?

Neither Onebox nor Adjoltz shows ads.

### Which is updated more often, Onebox or Adjoltz?

Onebox ships an update every 4 weeks, and Adjoltz every 3 weeks. Most recently, Onebox was updated on October 14, 2026 and Adjoltz on October 15, 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.*