Comparison

SLYFONE vs 2nd Line

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

Head to head
About

SLYFONE

Obtain a genuine US mobile number for essential verifications and communications, alongside a global eSIM for data access in over 110 countries. This app ensures privacy, facilitates international calls, and provides reliable connectivity for travel and business.

Highlights
  • Virtual US mobile number
  • Global eSIM for data
  • App and account verifications
  • Two-factor authentication
  • International calls and texts
  • Spam blocking
  • No roaming fees
Features
Read full description

Get a Real US Mobile Number + Global eSIM in One Powerful App SLYFONE is the only app that gives you both: A real U.S. mobile number (not VoIP) for verifications, calls, and secure texting A global eSIM to stay connected with mobile data in 110+ countries Use SLYFONE to activate WhatsApp, protect your privacy, make international calls, and stay online wherever life takes you. What Makes SLYFONE Unique? Unlike VoIP apps, SLYFONE gives you a real mobile number you can use for app signups, banking, and secure 2FA. And with built-in global eSIM, you get instant, affordable data without SIM cards, roaming charges, or local carriers. Whether you're at home, traveling, or building your business, SLYFONE has you covered. Top Features Virtual U.S. Mobile Number - Activate apps like WhatsApp, Telegram, Zelle, PayPal & more - Receive SMS for 2FA or signups (works with banks, crypto, social media) - Make & receive calls or texts over Wi-Fi/data - Caller ID, voicemail, call forwarding, and spam blocking - Perfect second line for business or privacy Global eSIM Coverage - Get mobile data in over 100 countries — no SIM card needed - Easy to install and activate from the app - Avoid roaming fees while traveling - Use alongside your SLYFONE number for full global connectivity - Ideal for travelers, expats, digital nomads, and remote workers   Use SLYFONE For: - App & account verifications (WhatsApp, Uber, Binance, etc.) - Two-factor authentication (2FA) codes from banks and social platforms - Traveling without roaming or SIM swaps - Keeping your personal number private - Running your small business or side hustle with a dedicated line -Secure texting & calling while abroad All-In-One Communication Tools - Real US number (not VoIP) - Global eSIM (travel-ready) - Send/receive texts & calls - Spam call blocking - Call forwarding to any US/Canada number - Caller ID & voicemail transcription - Share media in messages - Number porting support - Free toll-free calls (no subscription needed) Subscription Plans A paid plan is required to activate and use your US number. - 3-Month Plan – $8.99 - Annual Plan – $29.99 - Outbound Credits – $10 for 1000 credits (1 credit = 1 SMS or 1 min call) No hidden fees. No free trial. Please review pricing before purchasing. Privacy Policy: https://slyfone.com/privacy/ Terms of Use: https://slyfone.com/terms.html

About

2nd Line

Obtain a secondary phone number instantly for private calls, texts, and online registrations. Protect your personal number from spam and receive verification codes for apps like WhatsApp and dating services. Enjoy international calling and texting without a physical SIM card.

Highlights
  • Get a second phone number instantly
  • Private calls and texting
  • Receive SMS for app verification
  • International calling and texting
  • No physical SIM required
  • WiFi calling
Features
Read full description

- Get Your Second Phone Number - International Calling & Texting with Your 2nd Line - Receive SMS Online for Social Platforms 2nd Line Super gives you a real second phone number in seconds. Make private calls, send SMS, and receive verification codes without needing another SIM card. Whether you need a 2nd phone number for texting, calling, SMS verification, or a private number for online registrations, 2nd Line+ gives you full control over your communication. With our virtual phone number app, you can easily create a 2nd line for texting and calling, protect your personal number, and stay connected worldwide. GET A SECOND PHONE NUMBER INSTANTLY - Get a second phone number in seconds - Choose a US phone number, UK number, Canada number, and more - Use your 2nd line for calling, texting, and SMS - No physical SIM card required - Manage multiple phone numbers in one app 2nd Line Super makes it easy to create a new phone number for personal, business, or online use while keeping your real phone number private. INTERNATIONAL CALLING & TEXTING - Unlimited texting and calling with your 2nd phone number - Affordable international calling - Reliable voice calls and SMS messaging - Use WiFi calling and VoIP - Send and receive SMS from your virtual number Your second phone number works like a real mobile number, allowing you to call and text globally without extra devices. RECEIVE SMS ONLINE & VERIFICATION CODES - Use your number for messaging apps, Telegram, Tinder, and more - Get fast OTP and activation codes - Protect your personal number from spam - Register for apps without exposing your real phone - Use a virtual number for online accounts PRIVATE & BURNER PHONE NUMBER - Create a burner phone number for temporary use - Use a disposable phone number for online services - Keep your personal number private - Avoid spam calls and messages - Delete numbers anytime when no longer needed Whether you need an anonymous phone number, temporary number, or private number, 2nd Line+ gives you complete control. GLOBAL NUMBERS FOR SMS, OTP & CALLING - Most Popular: United States, United Kingdom, Canada - Europe: Germany, France, Spain, Italy, Netherlands, Poland, Sweden, Romania, Switzerland, Turkey, and more - Asia: Japan, South Korea, Singapore, Malaysia, Indonesia, India, Hong Kong, Taiwan, Philippines, Vietnam, and more - Latin America: Brazil, Mexico, Colombia, Chile, Peru, and more Get a second phone number and receive SMS verification codes from top countries worldwide. WHY 2ND LINE SUPER? - Instant second phone number activation - Reliable SMS delivery - High-quality voice calls - Flexible plans for short-term and long-term use - Secure and private communication Use 2nd Line Super as your second phone number, texting app, calling app, and SMS verification tool, all in one place. About Subscriptions and Terms of Use: - For Unlimited Features of 2nd Line Super, premium subscriptions are needed. - Payment will be made from your iTunes account after you confirm the purchase. - Subscriptions will auto-renew at the end of each term if it is not canceled 24 hours before the end of the purchasing term. - The user can manage subscriptions. Auto-renew can be turned off from iTunes account settings. - You can cancel your subscriptions by entering: http://support.apple.com/en-us/HT202039 - Privacy Policy: https://secondlineplus.com/privacy-policy - Terms of Use: https://secondlineplus.com/terms-of-use - Support mail: help@secondlineplus.com 2nd Line Super is not affiliated with or endorsed by WhatsApp or Meta. WhatsApp is a trademark of WhatsApp LLC.

Screenshots

SLYFONE4 screens
2nd Line4 screens

Verdict

The call

The clearest difference is review sentiment: 2nd Line at 71% against SLYFONE's 24%. 2nd Line also leads on ads (none vs shown) and update cadence (fortnightly vs every 6 weeks). SLYFONE's advantage is rating (4.6 vs 4.4). On price, ratings volume, 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. SLYFONE sells 7 in-app purchases, starting at $14.99 per 3 months and 2nd Line sells 23 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

SLYFONE holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 777 and 1.3K respectively. Written reviews complicate that: 24% of SLYFONE's written reviews are positive against 71% of 2nd Line's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

SLYFONE ships an update every 6 weeks, 2nd Line fortnightly. Both last shipped on October 27, 2026.

Scorecard4 real differences · 6 level
SLYFONE versus 2nd Line: the parameters behind the verdict, then further details
ParameterSLYFONE2nd Line
PriceFreeFree
Rating4.6 (777 ratings) — better4.4 (1.3K ratings)
Positive reviews23.7% of reviews70.7% of reviews — better
Number of ratings7771.3K — better
Update frequencyEvery 6 weeksFortnightly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.0 — better15.1
Further details — not scored
Size94 MB98 MB
Age rating4+4+
DeveloperMobileSphere, LtdESIM TRAVEL DATA INC

Customer experience

SLYFONE

All ratings789 ratings
Positive89.2%
Neutral3.2%
Negative7.6%
Written reviews76 reviews
Positive23.7%
Neutral1.3%
Negative75.0%

2nd Line

All ratings1,263 ratings
Positive84.1%
Neutral4.2%
Negative11.7%
Written reviews771 reviews
Positive70.7%
Neutral3.9%
Negative25.4%

User reviews

SLYFONE

From 777 App Store ratings

What we love

  • ⭐ Excellent app
  • 🙌 Saved me from a problem
  • 👍 Very good

Room to improve

  • 💰 Expensive subscription
  • 🔒 Unsafe app with harassment
  • 🐛 Non-functioning features
  • 🚫 Doesn't work as advertised
  • 📞 Poor call quality

2nd Line

From 1.3K App Store ratings

What we love

  • 💰 Affordable
  • 🔒 Secure
  • 📱 Convenient second number
  • 🌍 Wide range of number options
  • 🛠️ Useful features (voicemail, call forwarding, etc.)

Room to improve

  • 🔍 Limited number of available numbers
  • 🔊 Occasional poor call quality
  • 💸 Expensive premium features
  • 🌐 Regional limitations (only available in US/Canada)
  • 📢 Intrusive ads in free version

Bugs and requests

SLYFONE

Reported bugs

4 issues
  • Account temporarily unavailable
  • Texts/codes not received
  • Calls not working properly
  • Login/sign-up issues

Requested features

3 requests
  • Fix international prefix support
  • Improve call forwarding
  • Add more features like Dingtone app

2nd Line

Reported bugs

3 issues
  • Verification codes not working
  • Frequent errors or crashes
  • Limitations when used outside supported regions

Requested features

4 requests
  • More number options and packages
  • Improved call quality
  • Expanded international availability
  • Ad-free premium version

In-app purchases

7 purchases

SLYFONE

Subscriptions2
  • Three Months Plan$14.993 Months
  • Yearly Plan$49.991 Year
One-time5
  • eSIM$3.00
  • 10 Dollar Credit Bundle$10.00
  • 25 Dollar Credit Bundle$25.00
Show 2 more
  • 50 Dollar Credit Bundle$50.00
  • 100 Dollar Credit Bundle$100.00
23 purchases

2nd Line

Subscriptions18
  • Pro Number Weekly Subscription$6.997 Days
  • First Number Unlimited Weekly$9.997 Days
  • Second Number Pro Weekly$9.997 Days
Show 15 more
  • Weekly Pro 2nd Line+ Number$9.997 Days
  • Weekly Pro Number Offer7 Days trial$9.997 Days
  • Second Number$9.991 Month
  • Second Phone Number 3 Monthly$9.993 Months
  • First Number Unlimited Monthly$12.991 Month
  • Second Phone Number Monthly$12.991 Month
  • Monthly Pro 2nd Line+ Number$12.991 Month
  • Verification Number Monthly$14.991 Month
  • Second Verification Number Pro$14.991 Month
  • Verification Number Monthly$16.991 Month
  • Monthly Verification Number$16.991 Month
  • 3 Monthly Number Subscription$19.993 Months
  • Extra 3 Line Phone Number$29.991 Month
  • Verification Number Yearly$39.991 Year
  • Yearly Pro 2nd Line+ Number$39.991 Year
One-time5
  • 1000 Credit for SMS Texting$4.99
  • 2500 SMS Texting Credit$6.99
  • 5000 Credit for SMS Texting$9.99
Show 2 more
  • One-Time Verification Number$12.99
  • 3000 eSim Credit for 2ndLine+$44.99

Questions

Is SLYFONE free?
SLYFONE is free to download, with in-app purchases available.
Is 2nd Line free?
2nd Line is free to download, with in-app purchases available.
Which has better reviews, SLYFONE or 2nd Line?
SLYFONE is rated higher. SLYFONE averages 4.6 out of 5 from 777 ratings, while 2nd Line averages 4.4 from 1.3K ratings.
Do SLYFONE or 2nd Line have ads?
SLYFONE shows ads; 2nd Line does not.
Which is updated more often, SLYFONE or 2nd Line?
SLYFONE ships an update every 6 weeks, and 2nd Line fortnightly. Most recently, SLYFONE was updated on October 27, 2026 and 2nd Line on October 27, 2026.

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