Vialer vs Call One UC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Vialer
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.
- Business number calling
- Recent calls list
- Colleague availability insight
- Call statistics management
- VoIP calling via 4G/WiFi
- Customizable accessibility
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Easily dial out with your business number using the Vialer app on your smartphone. In the app you can find made and received calls in the recent calls list. You have direct insight into the reachability of your colleagues and incoming calls automatically reach the right person in the organization. You can always view and adjust your statistics, call plan and accessibility. With the Vialer app you call via 4G or WiFi. The only thing you need is a VoIP account linked to your user account. After this, you can immediately start using VoIP calling. The called customer will see your business number on their screen. Note: to use this app, you need a user account from your hosted telephony provider. Want to know more about the app? Go to https://vialerapp.com
Call One UC
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.
- 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
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Max UC - For customers of Call One using the Call One UC product. IMPORTANT: FULL TELEPHONY FUNCTIONALITY IS ONLY AVAILABLE WITH AN ACTIVE CALL ONE UC ACCOUNT ***** With Call One UC, you can take control of your home or office telephony services from anywhere. FEATURES • Call One Meeting: Join audio and video conferences that you are invited to • Make and receive calls over WiFi/LTE/3G using your landline number • Move calls between your landline, mobile and tablet devices, without hanging up • Add video to your calls • Make calls from any phone using your landline caller ID • Receive new voicemail alerts • Playback voice and video messages and view faxes • View transcribed voice messages • Control how incoming calls are handled • Sync your Accession contacts across devices NOTE: Your current feature bundle may not offer all features listed and may require you to pay additional subscription charges to access certain features. Contact your sales agent for information. Call One UC also requires 3G/4G or WiFi access. Use of these services may incur additional charges.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Vialer | Call One UC |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.2 (29 ratings) |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | 2 | 29 — better |
| Update frequency | Every 3 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 93 MB | 148 MB |
| Age rating | 4+ | 4+ |
| Developer | VoIPGRID | Call One, Inc. |
Customer experience
Vialer
Call One UC
In-app purchases
Vialer
No in-app purchases
Call One UC
No in-app purchases








