# Onebox vs Call One UC

The clearest difference is rating: Call One UC at 4.2 against Onebox's 3.0. Call One UC also leads on review sentiment (50% vs 35%) and monetization model (free vs ad-supported). Onebox's advantage is update cadence (every 4 weeks vs every 4 months). On price, ratings volume, 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.

Call One UC holds the better App Store score, 4.2 against 3.0. Both are backed by a comparable volume of ratings — 46 and 29 respectively. Written reviews point the same way: 35% of Onebox's written reviews are positive against 50% of Call One UC's.

Onebox ships an update every 4 weeks, Call One UC every 4 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Onebox | Call One UC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (46 ratings)](https://appshunter.io/ios/app/onebox-virtual-phone-system/id338908820/reviews) | **[4.2 (29 ratings)](https://appshunter.io/ios/app/call-one-uc/id1358793823/reviews)** |
| Number of ratings | **46** | 29 |
| Positive reviews | 35.3% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 4 months |
| Monetization | Ad-supported | **Free** |
| Size | 202 MB | 148 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [J2 Web Services, Inc.](https://appshunter.io/developer/1496258416) | [Call One, Inc.](https://appshunter.io/developer/1358793822) |

## 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


### Call One UC

[App page](https://appshunter.io/ios/app/call-one-uc/id1358793823)

Manage your home or office telephony services remotely. Make and receive calls using your landline number over WiFi or cellular data, and seamlessly transfer calls between devices. Includes features for conference calls, voicemail, and fax management.

**Highlights:** Join audio/video conferences, Make/receive calls with landline number, Transfer calls between devices, Add video to calls, Use landline caller ID, Voicemail and fax playback, Transcribed voice messages

**Features:** macOS Compatibility, Siri integration

**In-app purchases:** none


## Frequently asked questions

### Is Onebox free?

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

### Is Call One UC free?

Call One UC is free to download, with no in-app purchases.

### Which has better reviews, Onebox or Call One UC?

Call One UC is rated higher. Onebox averages 3.0 out of 5 from 46 ratings, while Call One UC averages 4.2 from 29 ratings.

### Do Onebox or Call One UC have ads?

Neither Onebox nor Call One UC shows ads.

### Which is updated more often, Onebox or Call One UC?

Onebox ships an update every 4 weeks, and Call One UC every 4 months. Most recently, Onebox was updated on October 23, 2026 and Call One UC on October 24, 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.*