# Vialer vs Call One UC

The clearest difference is rating: Vialer at 5.0 against Call One UC's 4.2. Vialer also leads on update cadence (every 3 weeks vs every 4 months). Call One UC's advantage is ratings volume (29 vs 2) and iOS requirement (12.0 vs 14.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Vialer holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Call One UC has 29 ratings behind it against 2, so its average is the more settled of the two.

Vialer ships an update every 3 weeks, Call One UC every 4 months. The most recent releases landed on October 6, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Vialer | Call One UC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/vialer/id806182776/reviews)** | [4.2 (29 ratings)](https://appshunter.io/ios/app/call-one-uc/id1358793823/reviews) |
| Number of ratings | 2 | **29** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free | Free |
| Size | 93 MB | 148 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [VoIPGRID](https://appshunter.io/developer/869280060) | [Call One, Inc.](https://appshunter.io/developer/1358793822) |

## What reviewers say

### Vialer

[App page](https://appshunter.io/ios/app/vialer/id806182776)

Make and receive business calls using your company's number from your smartphone. Track call history, view colleague availability, and manage your call statistics and accessibility settings. Requires a VoIP account and user credentials from a hosted telephony provider.

**Highlights:** Business number calling, Recent calls list, Colleague availability insight, Call statistics management, VoIP calling via 4G/WiFi, Customizable accessibility

**Features:** Vision Pro support

**In-app purchases:** none


### 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 Vialer free?

Vialer 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, Vialer or Call One UC?

Vialer is rated higher. Vialer averages 5.0 out of 5 from 2 ratings, while Call One UC averages 4.2 from 29 ratings.

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

Neither Vialer nor Call One UC shows ads.

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

Vialer ships an update every 3 weeks, and Call One UC every 4 months. Most recently, Vialer was updated on October 6, 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.*