# Ublux vs CallHarborUC

The clearest difference is rating: Ublux at 5.0 against CallHarborUC's 3.3. CallHarborUC's advantage is ratings volume (6 vs 1). 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.

Ublux holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: CallHarborUC has 6 ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 7 months. The most recent releases landed on September 23, 2026 and June 8, 2026 respectively.

## The numbers

| Metric | Ublux | CallHarborUC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ublux/id6467048472/reviews)** | [3.3 (6 ratings)](https://appshunter.io/ios/app/callharboruc/id6497948881/reviews) |
| Number of ratings | 1 | **6** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | Every 7 months |
| Monetization | Free | Free |
| Size | 116 MB | 100 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Ublux](https://appshunter.io/developer/1708098836) | [Active Solutions Group, Inc.](https://appshunter.io/developer/1222134241) |

## What reviewers say

### Ublux

[App page](https://appshunter.io/ios/app/ublux/id6467048472)

This app provides a VOIP calling solution for seamless international communication. It offers free app-to-app calls with high-definition quality and secure discussions. Access international numbers from 160 countries with 24/7 security and data encryption.

**Highlights:** International calling from 160 countries, Free app-to-app calls, High-definition call quality, Secure discussions with data encryption, Seamless integration with tools, Scalable call volume

**In-app purchases:** none


### CallHarborUC

[App page](https://appshunter.io/ios/app/callharboruc/id6497948881)

This app allows you to use your professional phone extension on your mobile device. Make and receive calls from anywhere, and enjoy free in-app calls with other users.

**Highlights:** Carry your extension on mobile, Make and receive calls on the go, Log in with existing credentials, Free in-app calls among users, High-quality audio

**In-app purchases:** none


## Frequently asked questions

### Is Ublux free?

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

### Is CallHarborUC free?

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

### Which has better reviews, Ublux or CallHarborUC?

Ublux is rated higher. Ublux averages 5.0 out of 5 from 1 ratings, while CallHarborUC averages 3.3 from 6 ratings.

### Do Ublux or CallHarborUC have ads?

Neither Ublux nor CallHarborUC shows ads.

### Which is updated more often, Ublux or CallHarborUC?

Ublux ships an update every 7 months, and CallHarborUC every 7 months. Most recently, Ublux was updated on September 23, 2026 and CallHarborUC on June 8, 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.*