Streams UC vs Mobile ZAC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Streams UC
This app unifies office communications, team messaging, and cloud file management into a single, secure mobile platform. Make and receive office calls, message teams with rich media, and securely sync and share files from anywhere.
- Full-featured softphone for office calls
- Multimedia persistent team messaging
- Real-time presence indication
- Full video calling and conferencing
- Secure file store, sync, and share
- Unlimited secure cloud storage
- Multi-factor authentication and HIPAA compliance
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Take your office communications and files with you wherever you go with Streams. Streams integrates real-time communications, multi-media team messaging and full cloud file sync & share capabilities into a single, secure, easy to use mobile app. Make and receive office calls while on the road without missing a beat. Instantly set up team channels and persistently message teams, sharing pictures, video, audio, text, files, folders and even live broadcasts. Upload, sync and share files securely in Stream’s HIPAA secure unlimited cloud storage. And with Streams multi-factor authentication, full encryption of communications and content in-transit and at-rest and multiple device manager, you can have complete peace of mind that all your communications and content are secure and private. • Full featured softphone for making or receiving calls (ext-to-ext or PSTN) with call transfer, call park and call forward. Turns your smartphone, tablet or notebook into your office phone • Multi-media, persistent team messaging supports text, links, audio, video, images, files, folders and live broadcasts • Real-time presence indication with manual selection and custom message status • Full video calling and conferencing support • Unified Live Monitor with complete Call Center monitoring • Complete secure file store, sync and share capabilities for the enterprise • Unlimited secure cloud storage (with Streams - SmartBox Enterprise plan) • Complete share content controls, including share privileges, share link, customer share notification and more • Complete contact management with import support for Outlook, Google, Yahoo and *.csv files • Enhanced security with multi-factor authentication, HIPAA compliance, optional MPLS network and Single Sign On support • Multiple device management with MADM (remotely block your device should it be lost or stolen) • Supports Wi-Fi and Data cellular (3G/4G) • Uses advanced push notification technology for lower battery usage and reliable phone and IM operation even when in the background • Bluetooth Headset support • MobileCall feature: Transparently move a call from your Smartphone/tablet to your desk phone or vice versa • Visual Voice Mail: See a list of voicemails, listen, delete in any order • Detailed call logs with call back • Push button call recording “The best way to give feedback is through the “Feedback” action in the "More Options" menu of the app itself or send it directly to streams-feedback@panterranetworks.com. Thank you.” You must be an existing Streams customer with the desktop Streams capability to run Mobile Streams app. Tip for international travelers - You can avoid data roaming charges when outside the US by turning off data roaming and using Wi-Fi hotspots instead of your 3G/4G network. Since calls are charged under your PanTerra calling plan, you should not incur international roaming charges. *Important VoIP over Data Cellular Notice* Some mobile network operators may prohibit or restrict the use of Voice over Internet Protocol (VoIP) functionality over their network, such as the use of VoIP telephony over a cellular network, and may also impose additional fees, or other charges in connection with VoIP. Be sure to check the terms of your agreement with your cellular phone carrier. PanTerra will not be held liable for any charges, fees or liability imposed by your cellular/mobile carrier for the use of the Streams Mobile app.
Mobile ZAC
Transform your mobile device into a fully functional business phone. This app integrates with Zultys systems to provide remote and mobile employees with essential communication tools, including video conferencing, instant messaging, and call management.
- Video conferencing
- Scheduled conferences
- Call logs with filtering
- Instant messaging
- Call attached data
- Retrieve active calls
- Agent roles & queue monitor
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Wherever your job takes you, make your mobile device your business phone. Mobile ZAC allows remote and mobile employees to manage business communications while utilizing the same tools as Zultys Advanced Communicator (ZAC) and our browser-based Web ZAC. We bring significant cost savings and reliability to our customers by including our mobile app with every user bundle for every Zultys system. Feature Overview: • Support for AI Tools: Real-time closed captions, real-time sentiment analysis, and live transcription with searchable post-call transcripts. • Mobile Network Calling: Place outbound and receive inbound business calls over your mobile carrier network. • iOS Recents Control: A configurable option to control whether Mobile ZAC calls appear in the native Phone app’s Recents list. • Department Filtering: Quickly filter company contact list by department or sub-department, and hide system services like auto attendants and call groups. • Single Sign-On (SSO) Support: SAML SSO has been developed and tested with Entra ID and ClassLink, with the potential to support other identity providers such as Okta, Duo, Auth0, and OneLogin. • Inbound and Outbound SMS and MMS for Call Group Agents: Agents in Operator, ACD, and ICC groups can send and receive SMS and MMS messages. • Web Chat for Call Group Agents: Agents in Operator, ACD, and ICC groups can now receive real-time message notifications from website visitors and respond. • Video Conferences: Easily host or join a conference, whether it’s for a group or one-on-one. Choose from three different modes to match your preferences: Speaker, Grid, or Pin an individual user. • Scheduled Conferences: Now users can view, join, and schedule conferences directly from the mobile app. • Call Logs: You can view complete phone call records and review the call history. Easily find the exact information you need with new filter and sort options. • Emojis: Elevate your conversations with native emojis. • Call Attached Data: Accessing and completing Call Attached Data while on the go is now easier than ever. • Retrieve Call: Move an active call from one device to another quickly and effortlessly. This feature gives you flexibility and an uninterrupted call experience. • Agent Roles & Queue Monitor: Agent roles and queue monitor have now been added for call center functionality on the go. More Feature Highlights: • Access Call Attached Data, recordings, transcripts, and voicemails from the call log • View presenter screen sharing for one-on-one and conference calls • System speed dial access • Ability for users to reply to and forward any message • Password reset link • Network switching between cellular and Wi-Fi networks while maintaining calls • Real-time presence status and presence notes • Instant message with internal and external parties with IM alerts • SMS support • Call group support Mobile ZAC is supported on systems running MX version Release 17 and above. Access to the latest capabilities requires MX Release 19.
Screenshots
Verdict
The clearest difference is rating: Mobile ZAC at 4.0 against Streams UC's 3.3. Streams UC's advantage is update cadence (every 2 months vs every 3 months). On price, review sentiment, ratings volume and ads 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.
Mobile ZAC holds the better App Store score, 4.0 against 3.3. Both are backed by a comparable volume of ratings — 44 and 49 respectively. Written reviews complicate that: 65% of Streams UC's written reviews are positive against 59% of Mobile ZAC's, so the app with the better star average is not the one people write more warmly about.
Streams UC ships an update every 2 months, Mobile ZAC every 3 months. The most recent releases landed on August 20, 2026 and September 14, 2026 respectively.
| Parameter | Streams UC | Mobile ZAC |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (44 ratings) | 4.0 (49 ratings) — better |
| Positive reviews | 65.2% of reviews — better | 59.1% of reviews |
| Number of ratings | 44 | 49 — better |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 58 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | PanTerra Networks Inc., | Zultys, Inc |
Customer experience
Streams UC
Mobile ZAC
In-app purchases
Streams UC
No in-app purchases
Mobile ZAC
No in-app purchases









