iTeleCenter vs String
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iTeleCenter
This app transforms your mobile phone into a virtual office, allowing you to manage business calls, voicemails, and faxes. It keeps your personal number private while enabling professional communication and message management.
- Use virtual number as caller ID
- Return calls from messages
- Manage business messages and faxes
- Receive push notifications
- Read voicemails
- View faxes
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Download the iTeleCenter app for iPhone – the mobile companion to your iTeleCenter virtual phone system. Turns your mobile phone into your mobile office – take calls, read your voicemail, view faxes – make calls via iTeleCenter and keep your mobile number private. Use the iTeleCenter app on your iPhone to: -Make calls using your iTeleCenter number as caller ID – keep your personal number private! -Return calls just by tapping the call back button on a message -Keep your business messages and faxes separate from your personal ones -Receive Push notifications for messages and faxes -Read your Voicemail -Receive and View Faxes Get the iTeleCenter Virtual Phone System that includes: -Local, Vanity, 1 800 or other Toll Free Numbers -Multiple Extensions -Call Forwarding -Call Transfer -Call Recording -Send/Receive Faxes Online -Auto-Attendant -Music on hold -Instant Message/Fax Notification -Read your Voicemail -Professionally Recorded Greetings -Dial by Name directory Please note:You must have an active iTeleCenter service plan in order to use the iTeleCenter app on your iPhone.
String
Enhance customer engagement with a business SMS and voice platform. Organize your inbox, automate responses, and manage contacts efficiently. Send personalized messages to individuals or groups, and access your workflow from any device.
- Use existing or new phone numbers
- Organize inbox with sales funnel view
- Automated responses and auto-replies
- Contact management and CRM integrations
- 1-1, group, and mass messaging
- Templates and voicemail transcription
- Browser and mobile app access
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Boost your brand engagement with String’s intuitive business SMS marketing, text and voice. ANY PHONE NUMBER, EVEN LANDLINES Use your existing mobile or landline number with String. Select a new local number or upgrade to a vanity or toll free number of your choice. ORGANIZE YOUR INBOX Transform your inbox into a sales funnel or kanban board with various viewing, filtering and tagging options — Stay on top of your conversations and never miss a message again. POWERFUL MESSAGE MANAGEMENT Mark Unread and Archive — You love it for your emails, you’ll love it for your texts. STAY RESPONSIVE, 24/7 Amplify your interaction with automations and Auto-Replies — Respond to texts and missed calls on time, every time. TAP INTO ENDLESS POSSIBILITIES Contact Management & Integrations — Save important contact notes directly from the message thread. Capture contacts, import from your phone or computer,, automate workflows, integrate with tools you love (like your CRM, etc). REACH THE MASSES, OR JUST ONE Conversational, Groups or Mass Messaging — Respond directly with 1-1 messaging, message with a group,r or send personalized Mass Messages to multiple people at once, individually. BUILD A LOYAL CUSTOMER BASE Send promos, reminders and confirmations and never miss a lead, client or customer with Elite features like triggered Keyword Responses, and Auto-Replies. SAVE TIME Templates — No more copy-pasting the same message over and over. No time to listen to voicemail? View voicemail transcriptions in your inbox with visual voicemail. USE IT ANYWHERE Browser & Mobile Apps — Increase your workflow efficiency with access to String from your computer and mobile device. CALL FORWARDING & VOICE Separate your personal and professional calls with call forwarding and flexible voice settings. GOT QUESTIONS? Email our stellar support at support@joinstring.com. Find helpful articles, join our customer community and create tickets in our Help Center: https://help.joinstring.com/hc/en-us Terms of Service: https://www.joinstring.com/terms Privacy Policy: https://www.joinstring.com/privacy
Screenshots
Verdict
The clearest difference is rating: iTeleCenter at 4.6 against String's 3.5. iTeleCenter also leads on monetization model (free vs free with in-app purchases). On price, review sentiment, ratings volume and update cadence 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.
iTeleCenter holds the better App Store score, 4.6 against 3.5. Both are backed by a comparable volume of ratings — 139 and 62 respectively. Written reviews complicate that: 62% of iTeleCenter's written reviews are positive against 69% of String's, so the app with the better star average is not the one people write more warmly about.
iTeleCenter ships an update every 6 weeks, String every 2 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | iTeleCenter | String |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (139 ratings) — better | 3.5 (62 ratings) |
| Positive reviews | 61.5% of reviews | 68.6% of reviews — better |
| Number of ratings | 139 — better | 62 |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 18 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | COA Network | NumberBarn, LLC |
Customer experience
iTeleCenter
String
Bugs and requests
iTeleCenter
Not enough reviews yet to summarise bugs or requests.
String
Reported bugs
22 issues- Calls drop within seconds
- Line cuts out completely
- Website loads to a white screen
- App loads message threads out of order
- Tapping into a thread does not load any part of the conversation
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- Sending a message in the thread works, but the thread doesn’t load
- Tapping a thread loads an entirely different number/contact at the top
- Push notification badges don’t clear
- Text threads are slow to update and sometimes show off screen
- No where to sign up on the app
- Lost account after uninstall/reinstall
- No one to talk to for support
- iTunes account debited without loading sign-in page
- Stuck on unpaid account, cannot log out
- Missed calls do not show up on the main log panel
- Voicemails will not play in app
- No iPad App
- Web app directs back to mobile app
- No attention to detail in integrations
- Phone number picker is super limited
- No filtering by numbers
- Requires payment to see the app
Requested features
18 requests- Improve mobile app stability
- Fix website loading issues
- Ensure message threads load correctly
- Improve contact loading accuracy
- Fix push notification badge issues
Show 13 moreShow fewer
- Improve text thread update speed
- Enhance call stability
- Improve customer support responsiveness
- Provide in-app sign-up
- Allow account recovery
- Offer refunds
- Implement missed call notifications
- Ensure missed calls appear in logs
- Enable voicemail playback in app
- Develop an iPad app
- Improve sign-up process
- Add more phone number filtering options
- Integrate with CRM software like HubSpot
In-app purchases
iTeleCenter
No in-app purchases
String
No in-app purchases








