# AcuityVOIP vs C3 Complete Messenger

The clearest difference is update cadence: C3 Complete Messenger at every 6 months against AcuityVOIP's every 22 months. C3 Complete Messenger also leads on iOS requirement (15.0 vs 17.0). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for AcuityVOIP against 5.0 for C3 Complete Messenger. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

AcuityVOIP ships an update every 22 months, C3 Complete Messenger every 6 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | AcuityVOIP | C3 Complete Messenger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/acuityvoip/id1526899714/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/c3-complete-messenger/id6478599671/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 22 months | **Every 6 months** |
| Monetization | Free | Free |
| Size | 123 MB | 55 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Telephony Partners LLC](https://appshunter.io/developer/1526900016) | [Textable](https://appshunter.io/developer/1395042035) |

## What reviewers say

### AcuityVOIP

[App page](https://appshunter.io/ios/app/acuityvoip/id1526899714)

Stay connected to your business phone system from anywhere. This app allows you to access your corporate extension on your mobile device, ensuring you never miss an important call or communication while on the go.

**Highlights:** Access corporate extension, On-the-go connectivity, Mobile business communication, VoIP functionality

**Features:** Siri integration

**In-app purchases:** none


### C3 Complete Messenger

[App page](https://appshunter.io/ios/app/c3-complete-messenger/id6478599671)

Communicate with customers using your business phone number for texts and pictures. Access your messages from any device with a single login, and allow multiple users to manage a shared business number. This app makes it easy for customers to reach you via text without needing a separate application.

**Highlights:** Send and receive texts from business numbers, Support for picture messages, Use on multiple devices with one login, Web browser access, Multiple user access to shared numbers

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

**In-app purchases:** none


## Frequently asked questions

### Is AcuityVOIP free?

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

### Is C3 Complete Messenger free?

C3 Complete Messenger is free to download, with no in-app purchases.

### Which has better reviews, AcuityVOIP or C3 Complete Messenger?

AcuityVOIP and C3 Complete Messenger are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do AcuityVOIP or C3 Complete Messenger have ads?

Neither AcuityVOIP nor C3 Complete Messenger shows ads.

### Which is updated more often, AcuityVOIP or C3 Complete Messenger?

AcuityVOIP ships an update every 22 months, and C3 Complete Messenger every 6 months. Most recently, AcuityVOIP was updated on November 3, 2026 and C3 Complete Messenger on November 4, 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.*