Comparison

VoxSun Pro vs Key 2 Softphone

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Unlimited calling
  • Office number caller ID
  • Voicemail management
  • Call transfer
  • Cloud-based phone system
  • Internet faxing
  • Call recording
Features
Read full description

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.

About

Key 2 Softphone

Read full description

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

VoxSun Pro3 screens
Key 2 Softphone4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
VoxSun Pro versus Key 2 Softphone: the parameters behind the verdict, then further details
ParameterVoxSun ProKey 2 Softphone
PriceFreeFree
Rating4.3 (12 ratings) — better—
Positive reviews33.3% of reviews—
Number of ratings12 — better—
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.011.0 — better
Further details — not scored
Size118 MB99 MB
Age rating4+4+
DeveloperVoxSun TelecomKey 2 Communications

In-app purchases

None

VoxSun Pro

No in-app purchases

None

Key 2 Softphone

No in-app purchases

Questions

Is VoxSun Pro free?
VoxSun Pro is free to download, with no in-app purchases.
Is Key 2 Softphone free?
Key 2 Softphone is free to download, with no in-app purchases.
Do VoxSun Pro or Key 2 Softphone have ads?
Neither VoxSun Pro nor Key 2 Softphone shows ads.
Which is updated more often, VoxSun Pro or Key 2 Softphone?
VoxSun Pro ships an update every 4 months, and Key 2 Softphone every 3 months. Most recently, VoxSun Pro was updated on October 29, 2026 and Key 2 Softphone on October 25, 2026.

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