BT Cloud Work vs Avaya Cloud Office
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BT Cloud Work
Manage your business phone system from your smartphone. Handle calls, voicemails, faxes, messages, and video meetings on the go. Maintain your business caller ID and collaborate with colleagues seamlessly.
- Business caller ID
- VoIP calls
- Visual voicemail
- Internet fax
- HD video conferencing
- Team messaging
- Unlimited conference calling
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Download the BT Cloud Work app — the essential application for your BT Cloud Work service. Manage your phone system directly from your smartphone and handle your business calls, voicemails and faxes, messages, video meetings, anywhere. If you need any support please contact our service desk on 0800 389 0321. Use the BT Cloud Work app on your smartphone to: - Show your BT Cloud Work business number as your Caller ID when making calls. - Make VoIP calls over Wi-fi / 3G / 4G / 5G - Use the BT Cloud Work RingOut feature to continue making calls with business caller ID using your mobile network - Switch an active call to your mobile if you’re walking away from your desk - Keep all your business voicemails and faxes separate from your personal messages. - See who left a message, forward messages, and tap to return calls with Visual Voicemail. - Send and receive faxes, by accessing photos, email attachments, and cloud storage such as Dropbox & Google Drive - View call time, date, and duration, and return calls directly from your BT Cloud Work call logs. - Get notifications of incoming messages. - Access your company extensions as a contact group. - Conferencing feature with unlimited conference calling for up to 1000 participants per conference* - Host and participate in HD video conferencing meetings* - Collaborate with colleagues; send and receive messages and files BT Cloud Work - a cloud-based business phone system that delivers: - Local, Free Phone and Non Geographic numbers - Auto-receptionist - Multiple extensions - Advanced call management and answering rules - Multiple voicemail boxes - Visual voicemail - Internet fax - Music on hold - Custom greetings - Call screening - Call queues - Dial-by-name directory - Conferencing*
Avaya Cloud Office
This app unifies business communication, allowing users to call, message, and meet from a single interface. It supports team messaging, video conferencing with screen sharing, and HD calling. Integrations with other business apps streamline workflows.
- Team messaging
- Video meetings with screen sharing
- HD calling
- Single business number for calls, SMS, and fax
- App integrations
- File and task management
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Call, meet, message and more! Avaya Cloud Office lets you simplify the way your business communicates with a unified experience that’s intuitive to use and accessible from a phone, a browser or any mobile device. From a single interface you’ll chat with colleagues, make and receive calls, plan and join meetings, collaborate with screen sharing and video, and keep your teams on-task with file sharing, task management and virtual team rooms that let everyone share and stay up to date. With Avaya Cloud Office you will: Accelerate your decision making with team messaging Message individuals or teams in real time to stay connected, bring remote workers together, and resolve business issues, questions and decisions instantly. Share files, assign tasks and schedule meetings with a few simple clicks. Optimize employee and customer collaboration with frictionless video meetings Schedule and launch video meetings directly from the app or invite guests to join from their favorite browser. No download and no delay with all the benefits of screen sharing, in-meeting chat, recording and markup tools. Connect with intuitive, feature-rich HD calling Find and connect with your customers and colleagues with one click. Know who called and when, and invoke the features you need through the intuitive interface. Seamlessly move from one device to another as your busy day unfolds. Simplify your communications with a single number Call, text (SMS) and Fax using your Avaya Cloud Office business number. No need for your customers to remember multiple numbers and no need for you to mix business with personal communications. Get more done with integrations that make sense for the way you work You rely on desktop apps, workflow automation, and customer relationship management to get your work done every day. With Avaya Cloud Office, you can integrate those apps with your communications, creating a seamless experience that eliminates the need to switch between applications. An Avaya Cloud Office subscription is required. Features may vary by plan and country. Terms of Service: https://www.ringcentral.com/legal//eulatos.html Privacy Notice: https://www.ringcentral.com/legal/privacy-notice.html Acceptable Use Policy: https://www.ringcentral.com/legal/acceptable-use-policy.html Emergency Services Policy: https://www.ringcentral.com/legal/emergency-services.html
Screenshots
Verdict
The clearest difference is review sentiment: Avaya Cloud Office at 68% against BT Cloud Work's 24%. Avaya Cloud Office also leads on rating (4.2 vs 3.0) and ratings volume (66 vs 2). BT Cloud Work's advantage is monetization model (free vs subscription). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Avaya Cloud Office holds the better App Store score, 4.2 against 3.0. That said, the two scores are not equally well evidenced: Avaya Cloud Office has 66 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 24% of BT Cloud Work's written reviews are positive against 68% of Avaya Cloud Office's.
Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 17, 2026 and September 20, 2026 respectively.
| Parameter | BT Cloud Work | Avaya Cloud Office |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 4.2 (66 ratings) — better |
| Positive reviews | 23.7% of reviews | 68.4% of reviews — better |
| Number of ratings | 2 | 66 — better |
| Update frequency | Every 3 months | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 326 MB | 370 MB |
| Age rating | 4+ | 4+ |
| Developer | British Telecommunications plc | RingCentral, Inc |
Customer experience
BT Cloud Work
Avaya Cloud Office
Bugs and requests
BT Cloud Work
Reported bugs
149 issues- App keeps going offline on mobile
- App shows offline when out of app
- Significant delay on calls
- Impossible to hold conversation
- Phone doesn't always ring
Show 144 moreShow fewer
- App logs out without notice
- Cannot send texts or do conferencing
- Temporary server issue is permanent
- Displays only initials for contacts
- Shows only phone number when app not open
- Falls over regularly
- Random beeping noises
- Features don't work
- Doesn't do anything when changing settings
- Doesn't tell you people have called
- Frequently drops calls
- Doesn't like working on 4G
- Keypad too small on iPhone
- Significant battery drain
- Call drop consistently
- Cut out mid conversation
- Slow clunky GUI
- Terrible functionality
- No SMS options
- Option buried away in menu
- Glitchy and clunky
- Disconnects on Wi-Fi
- Loses the call
- Cannot pickup from another handset
- Cuts out when calling
- Poor signal
- Forever calling clients back
- Causes more problems than needed
- Line immediately goes dead
- Doesn't always register missed calls
- UI very messy
- Harder to use
- Call log doesn't clear
- Contacts temperamental
- Incoming calls random
- Company name precedes caller display
- Cannot change ringtone
- Line always broken
- Suddenly lost after a few seconds
- Keeps dropping calls
- Not secure as fixed landline
- Cannot answer a call using the app
- Calls cut off
- Drops calls mid sentence
- Have to ring back on mobile
- Calls randomly get cut off
- Hit and miss if you can hear call
- Hit and miss if phone rings
- Inconsistent service
- Unlikely to finish a call
- App keeps logging out
- Rubbish on Wi-Fi
- App disconnects on Wi-Fi
- App loses the call
- Cannot pickup from another handset
- App is completely useless
- App cuts out when calling
- Poor signal
- Forever calling clients back
- App causes more problems than needed
- Line immediately goes dead
- App doesn't always register missed calls
- Poor voice quality on WiFi
- UI very messy
- Harder to use
- Call log doesn't have an option to clear it
- Contacts are temperamental in showing up
- Typical BT Shambles
- Never worked properly
- Lost business because of it
- Incoming calls come in, sometimes with the name
- Company name always precedes caller display
- Cannot change ringtone
- Line is always broken
- Line is suddenly lost
- Keeps dropping calls
- Not secure to use
- Does not seem possible to answer a call using the app
- Calls cut off
- Random automated message when trying to accept calls
- Randomly cut off on outbound calls
- Customer service is atrocious
- Technical support is arrogant
- Hit and miss if you can hear call
- Hit and miss if phone rings
- Inconsistent service
- Unlikely to finish a call
- Worst customer service
- Worst company
- Useless, incompetent staff
- App only works with old Salesforce version
- Very unreliable
- App is losing business and customers
- Calls get cut off
- App rings again but nothing happens
- Support is hard to understand
- Problem not solved
- Cannot get out of contract without penalty
- No one at BT seems bothered
- App requires a reasonable signal
- Calls are crackling
- Calls keep merging with other calls
- Hear random people in the call
- Calls drop even with a very strong WiFi
- App doesn't ring when someone calls
- Miss calls in the app
- App doesn't keep up with IOS updates
- Problems within the app
- Mobile app is just a supplement
- Phone won't ring
- Sent to voicemail
- Costing money through loss of work
- Not receiving phone calls
- Call often drops immediately upon being answered
- Number of rings setting seemingly changes itself
- Simple task of ringing is hit and miss
- Makes it unusable
- System rarely works
- Miss calls
- Fiddlier to answer
- Frequently lose calls
- Often missed calls
- Voicemail messages are delayed
- System gets confused
- Lose call when answering on app
- Struggles with WiFi and 3G/4G switching
- Can't change ring tone or volume
- Can't call out from main office number
- Can't copy and paste from call log
- Too easy to accidentally trigger dialling
- Bluetooth hands-free doesn't work
- Cannot hear each other
- App performance is abysmal
- Can't make 'warm transfers'
- Can't get client back from hold
- Calls drop off daily
- Lose clients half through conversations
- Line crackles
- Becomes robotic
- Delay when chatting
- Calls don't come through
- Reluctant to assist with issues
- Integration with existing contacts issue
- Contacts listed under first name
Requested features
24 requests- Spell/grammar check on chat
- Improve basic functionality
- Add essential features
- Streamline the app
- Improve call handling
Show 19 moreShow fewer
- Make it less complicated
- Add SMS options
- Allow copy/paste numbers from phone/calendar
- Improve UI and navigation
- Add option to clear call log
- Improve contact display
- Add dark mode
- Improve video meeting integration with MS Office 365
- Add screen sharing in video meetings
- Improve ringtone options
- Allow changing ringtone and volume
- Allow calling from main office number
- Enable copy/paste from call log
- Add contacts to Google contacts
- Dedicated dial button
- Improve transfer functionality
- Add warm transfers
- Improve integration with existing contacts
- Allow calling from main office number
Avaya Cloud Office
Not enough reviews yet to summarise bugs or requests.
In-app purchases
BT Cloud Work
No in-app purchases
Avaya Cloud Office
No in-app purchases
