FusionSIP vs Agile UC3
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
FusionSIP
Read full descriptionHide full description
FusionSIP: The Mobile SIP Client for FusionPBX FusionSIP is the ideal mobile solution for users of the open-source FusionPBX phone system. Simple, flexible, and powerful - FusionSIP keeps you perfectly connected on the go. Highlights: Easy Setup: Configure via QR code or manual SIP data entry. Seamless Integration: Direct connection to FusionPBX via the EDNT Softphone API, which provides all necessary data. Cutting-Edge Technology: Supports push notifications, IPv4, and IPv6. Powerful Features: Extension selection Hold, call switching, and call forwarding (unattended & attended) Conference calling BLF and status display for colleagues Public and private phonebooks (local and server-based) Server-based call history, notes, and scheduling (private & public) Integrated chat (requires XMPP server) FusionPBX voicemail management Full fax support (send & receive) Manage call forwarding and block lists Customizable codecs, volume control, and Bluetooth support User-friendly design with Light & Dark Mode For Businesses & Offices: FusionSIP is also available in a desktop version, including interfaces to ERP and CRM systems. On request, the app can be custom-branded and tailored to your needs. Who is FusionSIP for? FusionSIP is specifically designed for businesses that use FusionPBX, providing a reliable, user-friendly solution for efficient communicationβanytime, anywhere. For Resellers: Upon request, the softphone can be branded, customized, and discounted. Download now and experience the full power of FusionPBX in the palm of your hand! Important Note: The FusionSIP soft client can only be used in combination with the EDNT SoftPhone API and FusionPBX. For a generic softphone solution, EDNT offers the Smart-SIP-Phone, which works as a SIP client immediately with any PBX or phone system.
Agile UC3
Read full descriptionHide full description
Agile UC3 integrates your device with FourNet's Agile UC3 platform and delivers secure mobile voice, video, conferencing, instant messaging and more.
Screenshots
Verdict
The clearest difference is update cadence: FusionSIP at every 2 weeks against Agile UC3's every 9 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
FusionSIP ships an update every 2 weeks, Agile UC3 every 9 months. The most recent releases landed on September 15, 2026 and October 1, 2026 respectively.
| Parameter | FusionSIP | Agile UC3 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks β better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details β not scored | ||
| Size | 11 MB | 110 MB |
| Age rating | 4+ | 4+ |
| Developer | EDNT GmbH | 4Net Technologies Ltd |
In-app purchases
FusionSIP
No in-app purchases
Agile UC3
No in-app purchases









