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Best apps like String β€” Modern Phone Inbox

32+ similar apps compared and reviewed

4.5 avg rating
10 free apps
Updated September 2026
String β€” Modern Phone Inbox
πŸ’Ό Business
πŸ“Š Productivity

String is great, but it's not the only option. Explore 32+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.

Top Alternatives to String

iPlum: Business Phone Number#1

iPlum: Business Phone Number by iPlum, Inc.

Local,800 Tollfree,HIPAA Phone
Editor's Choice
πŸ’Ό Business
4.3😐(1.7K ratings)
FreeIn-App Purchases
iPlum: Business Phone Number screenshot 1
iPlum: Business Phone Number screenshot 2
iPlum: Business Phone Number screenshot 3
iPlum: Business Phone Number screenshot 4
iPlum: Business Phone Number screenshot 5

Add a second business phone number to your smartphone for local, toll-free, or international calls and texts. Enjoy HIPAA-compliant secure messaging, call recording, and a virtual receptionist. Stay connected and productive on the go with reliable VoIP service.

What We Love

  • πŸš€ Great call quality
  • πŸ”’ Secure and private
  • πŸ‘ Affordable pricing
  • πŸ‘ Useful second number feature
  • πŸ‘ Reliable service

Room to Improve

  • πŸ› Frequent app crashes
  • πŸ› Unreliable text messaging
  • πŸ› Poor customer support
  • πŸ› Dropped calls
  • πŸ› Difficult to port numbers
OnPhone: Second Number & eSIM#2

OnPhone: Second Number & eSIM by AnyDay Apps

2nd Phone Line, Texts & Calls
Strong Contender
πŸ’Ό Business
4.6😞(52K ratings)
FreeIn-App Purchases
OnPhone: Second Number & eSIM screenshot 1
OnPhone: Second Number & eSIM screenshot 2
OnPhone: Second Number & eSIM screenshot 3
OnPhone: Second Number & eSIM screenshot 4
OnPhone: Second Number & eSIM screenshot 5
OnPhone: Second Number & eSIM screenshot 6

Manage multiple private phone lines for personal and business use without needing extra SIM cards. Make calls, send texts, and even send/receive faxes worldwide. Offers eSIM data plans and AI-powered communication tools.

What We Love

  • πŸš€ Fast and easy to use
  • πŸ‘ Great customer service
  • πŸ’‘ Useful for getting second numbers

Room to Improve

  • πŸ› Unreliable service and numbers
  • πŸ’° Expensive subscription and hidden fees
  • πŸ”’ Security and privacy concerns
  • 🀯 Misleading advertising and bait-and-switch tactics
SmartLine Second Phone Number#3

SmartLine Second Phone Number by GoDaddy.com, LLC

2nd phone number for business
Worth Considering
πŸ’Ό Business
4.7😞(44K ratings)
FreeIn-App Purchases
SmartLine Second Phone Number screenshot 1
SmartLine Second Phone Number screenshot 2
SmartLine Second Phone Number screenshot 3
SmartLine Second Phone Number screenshot 4
SmartLine Second Phone Number screenshot 5

Get a dedicated second phone number for your business to maintain privacy and professionalism. This app ensures calls are business-related, offers a spam filter, custom voicemail, and voicemail-to-text transcription. Manage your business communications efficiently with organized history and timely notifications.

What We Love

  • πŸš€ Convenient business line
  • πŸ“ Stores call/text history
  • ⏱️ Ability to set business hours

Room to Improve

  • πŸ› Unreliable text messaging
  • πŸ“ž Missed/dropped calls
  • πŸ”” Delayed/missing notifications
  • πŸ€– Poor customer support

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Obtain a secondary phone number for private calls and texts without needing an extra SIM card. This app allows for international calling and texting, offering a separate line for personal or business use. Keep your primary number private while managing multiple contacts and communications.

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2nd Line - Second phone number
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Get a second phone number for calls and texts without needing a new SIM or device. This app provides real US, Canada, and Finland numbers for privacy, business, or personal use. Enjoy features like voicemail, call recording, and international calling.

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This app offers a virtual phone number and cellular data, acting as a replacement for traditional phone carriers in over 200 countries. It allows users to get a US local number, port their existing number, and manage multiple private and public numbers for various personal and business needs.

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Get a second phone number for texting globally. This app allows you to send and receive messages worldwide, including verification codes for account registrations. Choose from various plans and credit packages for affordable international communication.

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Obtain a secondary U.S. or Canadian phone number for calls and texts without needing an extra SIM card. Protect your personal number while communicating for various needs, including business, dating, or side projects. Manage multiple numbers easily and enjoy affordable international communication.

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