VirtualPhoneSystem vs String
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VirtualPhoneSystem
This mobile application transforms your smartphone into a portable office. It allows you to make and receive calls, manage voicemails, and view faxes using your business number, ensuring your personal contact information remains private.
- Use business number as caller ID
- Return calls from messages
- Separate business and personal messages
- Receive push notifications
- Read voicemails
- View faxes
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Download the Virtual Phone System app for iPhone – the mobile companion to your virtual phone system. Turns your mobile phone into your mobile office – take calls, read your voicemail, view faxes – make calls via Virtual Phone System and keep your mobile number private. Use the Virtual Phone System app on your iPhone to: -Make calls using your Virtual Phone System 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 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 Virtual Phone System service plan in order to use the Virtual Phone System 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 review sentiment: String at 69% against VirtualPhoneSystem's 0%. String also leads on update cadence (every 2 months vs every 5 months) and ratings volume (62 vs 9). VirtualPhoneSystem's advantage is rating (4.0 vs 3.5) and monetization model (free vs free with in-app purchases). On price, ads, in-app purchases and device support 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.
VirtualPhoneSystem holds the better App Store score, 4.0 against 3.5. That said, the two scores are not equally well evidenced: String has 62 ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 0% of VirtualPhoneSystem'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.
VirtualPhoneSystem ships an update every 5 months, String every 2 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | VirtualPhoneSystem | String |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (9 ratings) — better | 3.5 (62 ratings) |
| Positive reviews | 0.0% of reviews | 68.6% of reviews — better |
| Number of ratings | 9 | 62 — better |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.3 — better | 15.0 |
| Further details — not scored | ||
| Size | 3 MB | 68 MB |
| Age rating | 4+ | 4+ |
| Developer | COA Network | NumberBarn, LLC |
Customer experience
VirtualPhoneSystem
String
In-app purchases
VirtualPhoneSystem
No in-app purchases
String
No in-app purchases









