The mobile app is the part of our service that quietly does the most work. It is included with every Phone Service plan and every Pro Mobile plan, and it puts a real business extension on every user's iPhone or Android. Not a copy of your number - a real extension on the PBX with caller ID, voicemail, hunt groups, and the lot.
Customers often underestimate the app on the way in. They sign up for desk phones and only later notice that half their team rarely picks up the desk phone because they are answering on the app instead. That is by design. The phone system should follow the user, not the other way around.
What you actually get
The app is the same identity as the user's desk phone. Calls to the extension ring both. Outbound calls show the business caller ID. Voicemail lives in one inbox no matter where it was left.
Core features that matter day-to-day:
- Business and personal separation. Outbound calls placed through the app show the business number. Personal calls placed through the native dialer show the personal number. The customer never sees the employee's cell number.
- Voicemail in one place. Visual voicemail in the app. Voicemail transcription is a paid add-on for users who want messages emailed as text.
- Call handoff between devices. Pick up a call on the desk phone, walk to the car, hand off to the mobile mid-call.
- Presence. See whether teammates are available, on a call, or do-not-disturb before you transfer.
- WiFi to cellular handoff. Calls do not drop when the user walks out of WiFi range.
- SMS from the business number. Text customers from the business line, not the personal one.
- Inbound rules. Set business hours per user. After-hours calls roll to voicemail or to another extension.
- Call history and recording playback for users who have recording enabled.
- Conference and merge. Add a third party to a call from the app the same way you would from a desk phone.
- Contact search. Company directory available in-app. Dial by name without remembering the extension number.
Pro Mobile vs the mobile app - which do you need?
Both put a business line on a smartphone. The difference is how:
- Mobile app rides on WiFi or the user's existing cellular data. Free with the phone service plan. Works great in good network conditions. Can be flaky if the user is on bad cellular data or WiFi drops mid-call.
- Pro Mobile is a real cellular line ($42 to $62 per user/mo) with its own SIM or eSIM. Calls ride the cell voice network like any other call. Includes replacing the cell phone allowance and Roam Like at Home in 39 countries.
Sales reps, field techs, dispatchers, and anyone who lives on their phone typically goes Pro Mobile. Office workers with occasional out-of-office needs do fine on the app alone.
A practical rule of thumb
If the user's commute or job involves talking to customers while in motion, give them Pro Mobile. If they sit at a desk most of the day and use the mobile app for the occasional walk to the coffee shop, the free app is fine. We will mix both in a deployment - office staff on the app, road warriors on Pro Mobile.
Side-by-side
- Audio path: App = VoIP over data. Pro Mobile = cellular voice.
- Cost: App = included. Pro Mobile = $42 to $62/user/mo.
- WiFi dependency: App = strong dependency. Pro Mobile = none.
- International: App = wherever data works. Pro Mobile = Roam Like at Home in 39 countries.
- Caller ID: Both show the business number.
- Battery use: App = higher due to background data. Pro Mobile = same as any cellular line.
Setup is short
Onboarding the app for a new user is roughly:
- Admin creates the user in our portal
- User downloads the app, signs in with their extension credentials
- App registers, shows the dial pad, history, contacts, and voicemail
- Done
No app store license to manage. No second account to provision. The user has the same identity in the app as on the desk phone.
The five-minute admin setup per user
Inside the admin portal, the admin assigns an extension, picks a plan tier, and emails the user a one-page setup guide. The guide says: download the app, sign in, allow notifications, allow microphone, allow background app refresh. Five minutes per user, including the email. We have customers who roll out 50 users in an afternoon.
What it replaces
For most customers the app eliminates:
- Forwarding the desk phone to a cell when someone leaves the office
- Personal numbers showing up on customer caller ID
- A separate softphone client running on the laptop just to make a call from home
- Voicemails getting missed because nobody calls the desk extension
- Texting customers from personal phones with no business record
- Confusion about which number to share with which contacts
Real workday scenarios
Where the app earns its keep is in moments that used to be friction:
- Out-of-office customer call. Customer dials the main line, presses the menu for sales, hits the rep's extension. Rep is at lunch. Phone rings, app picks up, rep answers as the business. No "call me back at this other number" awkwardness.
- Snow day or office closure. Whole team works from home. Inbound calls hunt across the team's apps the same way they hunt across desk phones. Customers do not notice.
- Field tech with bad WiFi. Tech walks into a customer building with spotty WiFi. App stays connected through the cellular handoff. Calls do not drop mid-conversation.
- Manager picking up overflow. Front desk is on a call. Inbound rolls to a hunt group. Manager's app rings, manager answers from the parking lot, customer never hits voicemail.
- Texting a customer back without exposing personal number. Rep sends an SMS to confirm an appointment from the business line. Customer's reply lands in the app, not the rep's iMessage.
- After-hours emergency call. The receptionist's mobile app is in the after-hours hunt group. Urgent customer call rings the receptionist's phone at 8 PM. They answer or hand off to the on-call manager.
- Multi-location coverage. Three locations, lunchtime, one office runs short. Calls roll across the locations' app users. Nobody dropped.
Microsoft Teams users
If your team lives in Teams, you have a choice. Use our mobile app for calling, or use Teams calling with our Direct Routing. Both work. Teams is the right call if the team is already chat-and-meeting-heavy inside Teams.
Honest limits of the app
We do not pretend the app is identical to a real cellular line. Two things matter:
- Network dependence. If the cellular data or WiFi is bad, the call is bad. The app cannot fix flaky LTE in a basement.
- Battery. A constantly-registered VoIP app uses more battery than the native dialer. iPhone and Android have both improved this, but it is not zero.
- Background notifications. If the user force-quits the app or if the OS aggressively kills background apps, incoming calls may not ring. We help configure background permissions during onboarding.
- Carrier-grade reliability. The app is great. A real SIM is more reliable in marginal conditions.
Pro Mobile solves all three because it is a real cellular line, not a VoIP app. The app is the right tool when network conditions are reliable and the user does not need a second SIM.
Common mistakes with mobile app deployments
- Letting users skip the setup. If half the team never installs the app, your hunt groups have holes. Make installation part of the onboarding checklist.
- Forgetting to lock down personal SMS. Without a clear policy, reps will still text customers from iMessage. Train and enforce.
- Assuming WiFi calling is always good enough. For users in spotty network environments, Pro Mobile is worth the upgrade. Do not save $40 a month and lose half the calls.
- Skipping background-permission training on Android. Some Android OEMs aggressively kill background apps. A 5-minute walkthrough during onboarding prevents missed calls.
- Treating the app as a complete contact center. The app handles call queues, presence, and transfers cleanly. It is not a substitute for full contact center routing.
- Not updating the app. Old versions drift. Encourage users to allow auto-updates in the app store.
- Forgetting to remove departed staff. If a user leaves, deprovision the app. Otherwise the ex-employee can still receive business calls on their personal phone.
What to ask before adopting it as the office standard
- How does it handle WiFi to cellular handoffs? Real handoff means the call does not drop. Ours does.
- Does it support presence and supervision? Important for receptionists deciding where to transfer.
- What happens when the app is force-quit? Push notifications should still ring the device. Confirm.
- How is SMS billed? US SMS to and from business numbers is included on most plans. International SMS is metered. Confirm rates.
- What is the recording and compliance story? If you need calls recorded, confirm the app records both inbound and outbound, and that recordings store where your compliance requires.
- Is there an enterprise mobility management (MDM) integration? Useful for IT teams pushing the app to fleet devices.
- How do you handle BYOD users who leave? Removing the app should remove access to the business line cleanly.
Industry fit
The app fits cleanly across industries, with some accelerators per vertical:
- Healthcare and dental. HIPAA-compliant calling, BAA on file. See healthcare and dental practice pages.
- Legal firms. Per-attorney extensions following them between courtroom and office.
- Property management. Maintenance teams answering after-hours calls without using personal numbers.
- Real estate. Agents juggling listing calls without exposing their cell.
- Wellness clinics. See the wellness clinic page for HIPAA and intake workflows.
A 50-user services firm app rollout
One example from a customer migration last year. The firm had been on a hosted PBX with weak mobile support - the previous vendor's app was unreliable. About 30% of staff had given up on it and were forwarding desk phones to personal cells. Customer caller ID was personal numbers. Voicemails were getting lost across two systems. We migrated them to our platform and ran a structured rollout: pilot of 8 users for a week, then full rollout to 42 more users in a single Tuesday session. By end of week 4, 48 of 50 users were active on the app. The remaining two were back-office bookkeepers who genuinely never picked up the phone - we moved them to Per-Minute service and dropped the app from their workflow. Net result: the firm stopped paying for the second hosted PBX vendor, the leaked personal-number problem went away, and inbound calls landed on the right person in the first ring nine times out of ten.
Common rollout patterns we have seen
The way the app gets adopted in an organization usually falls into one of three patterns:
- The reactive rollout. Company adds the app because a couple of users asked for it. Half the team installs it, half does not. Coverage gaps appear in hunt groups. Painful but recoverable - close the gap with a mandatory install policy.
- The new-hire-only rollout. Existing users keep their old habits. New hires onboard with the app from day one. Slow but steady. Usually works for organizations with high turnover where the population shifts naturally.
- The all-at-once rollout. Pick a Tuesday. Install across the team in a single morning session. Train for 30 minutes. Done by lunch. Highest short-term effort, fastest long-term result. We help orchestrate this for customers who want it.
For mid-sized teams - 20 to 60 users - the all-at-once approach is usually the right call. Smaller teams can do reactive; larger teams need phased rollouts with location-by-location coordination.
Where to start
The app comes free with the service. The decision is which phone service plan and whether anyone needs Pro Mobile. Pricing and plan details on the pricing page, or get started with a quick discovery call. If you are weighing the app against carrying a second device, the replace cell phone allowance page has the math.