Comparison

String vs Telefeo

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

Telefeo

This app provides free app-to-app texting with end-to-end encryption and offers eSIM plans for mobile data in over 220 destinations. Purchase and activate digital SIMs for instant internet access worldwide.

Highlights
  • Free app-to-app texts
  • Digital eSIM for mobile data
  • Instant messaging
  • Prepaid internet plans
  • 5G/4G LTE high-speed data
  • End-to-end encryption
Features
Read full description

Telefeo is the ultimate all-in-one connectivity app that gives you a second phone number and global eSIM travel data without the need for a physical second SIM card or an extra device. Whether you need a dedicated virtual line for business, private texting for online marketplaces, or high-speed internet data packages while traveling internationally, Telefeo keeps you connected seamlessly across the globe. Separate your personal and professional life, save on roaming fees, and maintain your privacy with absolute ease. WHY CHOOSE TELEFEO? ● Two Solutions, One App: Get fully functional local phone lines and instant prepaid data roaming plans combined in one powerful application. ● Instant Activation: Choose your new number or pick a travel data package and get connected in just a few taps. ● Complete Privacy: Protect your real identity. Use a virtual line for verifications, dating apps, or business inquiries without exposing your primary number. ● No Contracts, No Hassle: Enjoy total flexibility. No hidden carrier fees, no physical SIM delivery wait times, and zero long-term commitments. PREMIUM SECOND PHONE NUMBER FEATURES ● Buy Phone Numbers: Instantly activate a Virtual Phone Number or Toll Free Phone Number for all supported countries with a local area codes of your choice. ● Global Calling & Texting: Place high-quality VoIP crystal-clear Wi-Fi calls and send SMS/MMS (pictures and text) to local phone numbers ● Keep a Presence Abroad: Traveling or living outside the US/Canada? Keep a domestic number active to stay effortlessly connected with local banks, businesses, clients, and family. ● Smart Contact Syncing: Effortlessly manage your personal contacts alongside your secondary workspace numbers within a secure ecosystem. GLOBAL eSIM TRAVEL DATA PLANS ● Say Goodbye to Roaming Fees: Access affordable, high-speed mobile data packages in destinations worldwide without paying expensive carrier roaming rates. ● Instant Digital Setup: Skip the airport lines and local vendor booths. Download your eSIM profile over-the-air instantly before you land. ● Flexible Packages: Select tailored prepaid data bundles based on your destination and trip length so you only pay for what you actually use. PERFECT USE CASES: ● Business & Freelancers: Keep a separate workspace line for clients, work texts, and corporate profiles. ● International Travelers: Access seamless maps, translation, and ridesharing apps abroad with instant local cellular data. ● Online Security: Safeguard your personal number from spam when signing up on marketplaces, dating platforms, and web services. ● Expats & Digital Nomads: Retain local banking ties and communicate back home without relying on external international hardware. PLEASE NOTE: An active subscription or pre-purchased balance is required to obtain and operate a virtual phone number. Calling and messaging capabilities are subject to regional carrier availability and destination constraints. Ensure your smartphone is carrier-unlocked and eSIM-compatible prior to purchasing travel data packages. ● Terms of Use: https://telefeo.com/terms-of-use/ ● Privacy Policy: https://telefeo.com/privacy-policy ● Customer Support: support@telefeo.com

Screenshots

String4 screens
Telefeo4 screens

Verdict

The call

The clearest difference is rating: Telefeo at 4.3 against String's 3.5. Telefeo also leads on review sentiment (85% vs 69%) and update cadence (every 3 weeks vs every 2 months). String's advantage is ratings volume (62 vs 15). On price, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Telefeo holds the better App Store score, 4.3 against 3.5. Both are backed by a comparable volume of ratings — 62 and 15 respectively. Written reviews point the same way: 69% of String's written reviews are positive against 85% of Telefeo's.

UpkeepUpdate frequency

String ships an update every 2 months, Telefeo every 3 weeks. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

Scorecard4 real differences · 6 level
String versus Telefeo: the parameters behind the verdict, then further details
ParameterStringTelefeo
PriceFreeFree
Rating3.5 (62 ratings)4.3 (15 ratings) — better
Positive reviews68.6% of reviews85.0% of reviews — better
Number of ratings62 — better15
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size68 MB93 MB
Age rating4+4+
DeveloperNumberBarn, LLCTech Wireless Ltd.

Customer experience

String

All ratings62 ratings
Positive64.5%
Neutral1.6%
Negative33.9%
Written reviews35 reviews
Positive68.6%
Neutral2.9%
Negative28.6%

Telefeo

All ratings15 ratings
Positive86.7%
Neutral0.0%
Negative13.3%
Written reviews20 reviews
Positive85.0%
Neutral0.0%
Negative15.0%

Bugs and 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
Show 17 more
  • 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 more
  • 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

Telefeo

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

String

No in-app purchases

None

Telefeo

No in-app purchases

Questions

Is String free?
String is free to download, with no in-app purchases.
Is Telefeo free?
Telefeo is free to download, with no in-app purchases.
Which has better reviews, String or Telefeo?
Telefeo is rated higher. String averages 3.5 out of 5 from 62 ratings, while Telefeo averages 4.3 from 15 ratings.
Do String or Telefeo have ads?
Neither String nor Telefeo shows ads.
Which is updated more often, String or Telefeo?
String ships an update every 2 months, and Telefeo every 3 weeks. Most recently, String was updated on November 2, 2026 and Telefeo on November 7, 2026.

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