VoxSun Pro vs Key 2 Softphone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VoxSun Pro
Make unlimited calls from anywhere with this business communication app. Manage voicemails, use your office number as caller ID, and transfer calls. Offers cloud-based phone system features like auto-receptionist and call recording.
- Unlimited calling
- Office number caller ID
- Voicemail management
- Call transfer
- Cloud-based phone system
- Internet faxing
- Call recording
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Download the VoxSun App and start making unlimited calls from anywhere to anywhere at any time. The VoxSun app allows you to easily make and receive phones calls and check your voicemail as if you were in the office. Stay productive even while you're on the go... You need to have an account with VoxSun Telecom to use this VoxSun App. Use the VoxSun app on your iPhone to: - Make unlimited calls - Show your office number as your caller ID when you make calls from your smartphone, wherever you are or get a second dedicated phone number - Check your voicemails while you're away from the office - Transfer calls in progress to a coworker or selected services - Receive alerts for received messages Get a cloud-based phone system with all business features included: - Local or toll-free numbers (including 800 numbers) - International numbers (more than 60 countries) - Voice recognition - Auto-receptionist - Multiple extensions - Advanced call management and answering rules - Dedicated voicemails for each extension - Call recording - Visual voicemail - Internet faxing - Customizable music on hold - Custom greetings - Multilingual system - Call screening and reporting - Call queues VoxSun is constantly improving its services. If you have found any bugs or have a suggestion, please send us an email at support@voxsun.com. IMPORTANT: To use this app, you must have an active paid account with VoxSun Telecom.
Key 2 Softphone
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With Key 2 Softphone mobile apps you and your team members can stay connected and more productive on the go while keeping your extension with you, wherever you are. ***Designed for use with the Key 2 PBX and services only.*** What Key 2 Softphone brings to your team: **Complete UC solution that works with your Phone System** • Collaborate with your team wherever you are. • Make video calls, organize audio conferences and group chats, create public channels, share files, and much more. **Easily and securely organize remote work for your employees** • Dial external numbers using corporate identity/phone numbers. Receive calls through your office extension. • Keep track of your business communications with the detailed customer profiles and history of communications organized by each contact. **Enhanced connectivity and call quality even with an unstable internet connection** • With push notifications you can stay connected anywhere you are while providing outstanding customer service. • Key 2 Softphone enhances the connectivity and the quality of voice implementing the best in class audio codecs. **Keeps your conversations and data secure.** • Key 2 Softphone apps provide encryption for calls, messages, and data by default using the strongest block cyphers available.
Screenshots
Verdict
The clearest difference is device support: Key 2 Softphone at 3 against VoxSun Pro's 1. Key 2 Softphone also leads on iOS requirement (11.0 vs 16.0). On price, update cadence, ads and in-app purchases 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.
VoxSun Pro ships an update every 4 months, Key 2 Softphone every 3 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.
| Parameter | VoxSun Pro | Key 2 Softphone |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (12 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 12 — better | — |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 118 MB | 99 MB |
| Age rating | 4+ | 4+ |
| Developer | VoxSun Telecom | Key 2 Communications |
In-app purchases
VoxSun Pro
No in-app purchases
Key 2 Softphone
No in-app purchases









