Mobile ZAC vs Threo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Read full descriptionHide full description
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.
Threo
This AI assistant provides a secure workspace for your organization, allowing you to chat, draft, summarize, and run specialized agents. It offers hands-free voice input and seamless synchronization with its web version, all while prioritizing privacy and company policies.
- Secure AI chat
- AI agents for repeatable tasks
- Hands-free voice input
- Attach photos, documents, and files
- Syncs with web version
- Quick Actions widget
- Encrypted in transit
Read full descriptionHide full description
Threo is your organization's secure AI assistant built for work and delivered by Synthreo. Sign in with your existing company account and get a fast, private AI workspace on your phone: ask questions, draft and summarize, run AI agents, and pick up conversations you started on the web. WHAT YOU CAN DO • Secure AI chat — get answers, write, summarize, and brainstorm with advanced AI models. • AI agents — run your organization's purpose-built agents for repeatable tasks. • Talk, don't type — hands-free voice input converts speech to text right on your device. • Bring your context — attach photos, documents, and files directly to a conversation. • Pick up where you left off — your chats stay in sync with Threo on the web. • Quick Actions widget — start a chat, open an agent, or talk to Threo from your Home and Lock Screen. • Light and dark mode — comfortable in any setting. BUILT FOR WORK, BUILT FOR PRIVACY • Encrypted in transit (HTTPS/TLS). • No advertising, no ad tracking, no selling your data. • Administered by your organization under your company's policies. REQUIRES AN ORGANIZATION ACCOUNT Threo is an enterprise app. You need an account provided by your organization to sign in — there is no consumer sign-up. If your company uses Threo, sign in with your work account to get started. Support is provided through your organization's administrator.
Screenshots
Verdict
The clearest difference is rating: Threo at 5.0 against Mobile ZAC's 4.0. Threo also leads on update cadence (every 2 days vs every 3 months). Mobile ZAC's advantage is ratings volume (49 vs 2). On price, ads, in-app purchases and monetization model 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.
Threo holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Mobile ZAC has 49 ratings behind it against 2, so its average is the more settled of the two.
Mobile ZAC ships an update every 3 months, Threo every 2 days. The most recent releases landed on September 14, 2026 and September 13, 2026 respectively.
| Parameter | Mobile ZAC | Threo |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (49 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 59.1% of reviews | — |
| Number of ratings | 49 — better | 2 |
| Update frequency | Every 3 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 16.4 |
| Further details — not scored | ||
| Size | 60 MB | 52 MB |
| Age rating | 4+ | 17+ |
| Developer | Zultys, Inc | Synthreo, Inc. |
Customer experience
Mobile ZAC
Threo
In-app purchases
Mobile ZAC
No in-app purchases
Threo
No in-app purchases









