# Horizon Smartphone App vs CallSwitch One

The clearest difference is update cadence: CallSwitch One at every 8 days against Horizon Smartphone App's every 9 months. CallSwitch One also leads on review sentiment (40% vs 12%). Horizon Smartphone App's advantage is iOS requirement (12.1 vs 15.0). 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.

Horizon Smartphone App ships an update every 9 months, CallSwitch One every 8 days. The most recent releases landed on October 29, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Horizon Smartphone App | CallSwitch One |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 11.5% of reviews | **40.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 8 days** |
| Monetization | Free | Free |
| Size | 62 MB | 57 MB |
| Requires iOS | **12.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gamma](https://appshunter.io/developer/445329272) | [NEBULA CLOUD LIMITED](https://appshunter.io/developer/1157972118) |

## What reviewers say

### Horizon Smartphone App

[App page](https://appshunter.io/ios/app/horizon-smartphone-app/id933224195)

Make and receive calls using your IP telephony service from your smartphone. Stay connected with colleagues through presence and instant messaging, perfect for remote or mobile workers.

**Highlights:** Make and receive IP calls, Instant messaging, User presence indicators, Remote work solution, Business communication

**In-app purchases:** none

**What reviewers like**

- 👍 Looks and feels like desktop app
- 👍 Works well for some users
- 👍 Great addition for mobile use
- 👍 Makes WFH a dream

**What reviewers complain about**

- 🐛 Constantly crashes and freezes
- 🐛 Calls drop frequently
- 🐛 Audio issues (no sound, drops out)
- 🐛 Login and password problems
- 🐛 Poor call quality and delays

**Reported bugs**

- App stops and freezes
- Lost ability to assess menu on call
- Cannot transfer, speaker, or end calls
- History screen does not allow deletion
- Screen does not automatically refresh

**Requested features**

- Allow deletion of call history
- Automatic screen refresh for missed calls
- Ability to add work contacts to app directory
- Direct access to iPhone contacts
- Ability to switch on do not disturb


### CallSwitch One

[App page](https://appshunter.io/ios/app/callswitch-one/id1660964003)

This app allows users to manage all their business communications on any device. It offers features like making and receiving calls from a landline number, voice and video conferencing, and team chat with file sharing.

**Highlights:** Business calls from landline number, Voice and video conferencing, Team chat with file sharing, Group and individual conversations, Business directory access, Conversation threads

**Features:** macOS Compatibility, Siri integration

**In-app purchases:** none


## Frequently asked questions

### Is Horizon Smartphone App free?

Horizon Smartphone App is free to download, with no in-app purchases.

### Is CallSwitch One free?

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

### Do Horizon Smartphone App or CallSwitch One have ads?

Neither Horizon Smartphone App nor CallSwitch One shows ads.

### Which is updated more often, Horizon Smartphone App or CallSwitch One?

Horizon Smartphone App ships an update every 9 months, and CallSwitch One every 8 days. Most recently, Horizon Smartphone App was updated on October 29, 2026 and CallSwitch One on October 20, 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.*