String vs Zonitel
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Zonitel
This business communication app allows users to manage calls, texts, and faxes from a single platform. It offers features like call history, recordings, unlimited domestic calls, and business messaging. Users can send and receive faxes directly through the application.
- Call history and recordings
- Unlimited domestic calls
- Business text messaging
- Send and receive faxes
- Unified communication platform
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New to Zonitel? Get started with the APP. 1. Login using your Zonitel username and password. If you have forgotten your password you can reset it bu clicking forgot password in the login page. 2. Your mobile app will have 4 main menus, Calls, Texts, Fax and Settings 3. View your call history, listen to recordings and make unlimited domestic calls, you will need an active cellular service to be able to make a call. 4. Send and receive texts on your business phone number 5. Send and receive faxes.
Screenshots
Verdict
The clearest difference is rating: Zonitel at 5.0 against String's 3.5. Zonitel also leads on review sentiment (100% vs 69%) and monetization model (free vs free with in-app purchases). String's advantage is ratings volume (62 vs 14). 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.
Zonitel holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 62 and 14 respectively. Written reviews point the same way: 69% of String's written reviews are positive against 100% of Zonitel's.
String ships an update every 2 months, Zonitel fortnightly. Both last shipped on October 24, 2026.
| Parameter | String | Zonitel |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (62 ratings) | 5.0 (14 ratings) — better |
| Positive reviews | 68.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 62 — better | 14 |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 68 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | NumberBarn, LLC | Zonitel Solutions LLC |
Customer experience
String
Zonitel
In-app purchases
String
No in-app purchases
Zonitel
No in-app purchases






