Comparison

SLYFONE vs Nextline

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

Nextline

Get instant global connectivity with an e-SIM in over 120 countries, avoiding roaming fees. This app also provides a second phone number for enhanced privacy and convenience, with unlimited calls and texts.

Highlights
  • Global e-SIM connectivity in 120+ countries
  • Second US phone number
  • Unlimited calls and texts
  • No roaming fees
  • Privacy protection
  • Easy e-SIM installation
Features
Read full description

Activate Nextline’s e-SIM to get online instantly in 120+ countries. Enjoy seamless global connectivity without roaming fees. No need for physical SIM cards—just easy, affordable service. With Nextline’s e-SIM, you can connect to the internet in 120+ countries and regions worldwide, avoiding expensive roaming fees. No need to swap SIM cards or carry another phone. Enjoy real US phone numbers with unlimited calls and texts. What is an e-SIM? An e-SIM is an embedded SIM card built into your phone’s hardware. It functions like a physical SIM but works 100% digitally. Purchase an e-SIM with Nextline, install it on your device, and connect to a mobile network at your destination. No physical SIM cards, spotty Wi-Fi, or surprise roaming fees—just seamless, affordable, and flexible connectivity. Nextline e-SIM Plans A Nextline e-SIM plan provides mobile data, call, and text services. Choose a prepaid local or regional e-SIM plan to get online in 120+ countries worldwide. Select your e-SIM package and connect to a mobile network when you arrive at your destination! How It Works? Install the Nextline app. Purchase an e-SIM plan. Install the e-SIM in minutes. Turn on your e-SIM and connect to the internet when you arrive. Our e-SIM feature is available in 120+ countries, including: US Canada UK Spain India Greece Brazil Italy France Turkey Second Phone Number Nextline also offers a second phone number option for added privacy and convenience. Available in the US, UK, Canada, France, and Portugal, this feature allows you to keep your personal number safe, separate work and personal life, and easily manage new contacts and verifications. Choose from over 300 US area codes for your local number. Easy and Risk-Free Nextline is easy and risk-free to use. No contracts, no hassles, and no verification required. Keep your conversations private and dispose of your number when done. Protect your privacy with unlimited texts and calls. Features Local numbers in over 300 US area codes Unlimited calls and texts Access contacts easily Call forwarding Access your account on any device with Wi-Fi or data Why Nextline? Instant global connectivity in 120+ countries Affordable e-SIM plans with no hidden fees Unlimited calls and texts Privacy protection with a second phone number Works on any supported device Ideal for travelers and busy lifestyles Easy disposal of your Nextline number Who Benefits from Nextline? Travelers: Stay connected without roaming fees. Digital Nomads: Manage work and life on the go. Business Professionals: Separate work and personal numbers. Frequent Shoppers: Secure transactions with a second number. Privacy Seekers: Protect your personal number in any situation. Nextline Subscription Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. Account will be charged for renewal within 24 hours prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Need Help? Our support team is here for you. Contact us through the app or email support@nextlineapp.com. Your feedback drives our improvements! Stay Safe with Nextline Please note, Nextline does not support emergency services. Enable push notifications for the best experience. Join the Nextline Family Experience seamless, secure, and flexible communication. Stay connected with Nextline and open up a world of possibilities! Terms of Service: https://nextlineapp.com/terms-of-service Privacy Policy: https://nextlineapp.com/privacy-policy

Screenshots

SLYFONE4 screens
Nextline4 screens

Verdict

The call

SLYFONE and Nextline both sit at 4.6 stars, but that hides the real split: 80% of Nextline's written reviews are positive against 24% of SLYFONE's. Nextline also leads on ads (none vs shown) and update cadence (every 2 weeks vs every 6 weeks). SLYFONE's advantage is monetization model (free with in-app purchases vs subscription) and iOS requirement (15.0 vs 17.0). On price, rating, 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

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 Nextline sells 7 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for SLYFONE against 4.7 for Nextline. That said, the two scores are not equally well evidenced: Nextline has 9.4K ratings behind it against 789, so its average is the more settled of the two. Written reviews are what separate them: 24% of SLYFONE's written reviews are positive against 80% of Nextline's.

UpkeepUpdate frequency

SLYFONE ships an update every 6 weeks, Nextline every 2 weeks. The most recent releases landed on September 23, 2026 and September 27, 2026 respectively.

Scorecard6 real differences · 4 level
SLYFONE versus Nextline: the parameters behind the verdict, then further details
ParameterSLYFONENextline
PriceFreeFree
Rating4.6 (789 ratings)4.7 (9.4K ratings) — better
Positive reviews23.7% of reviews80.5% of reviews — better
Number of ratings7899.4K — better
Update frequencyEvery 6 weeksEvery 2 weeks — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPod — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size94 MB102 MB
Age rating4+4+
DeveloperMobileSphere, LtdGRAND APPS YAZILIM VE TEKNOLOJI ANONIM SIRKETI

Customer experience

SLYFONE

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

Nextline

All ratings9,385 ratings
Positive92.0%
Neutral2.4%
Negative5.7%
Written reviews758 reviews
Positive80.5%
Neutral3.0%
Negative16.5%

User reviews

SLYFONE

From 789 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

Nextline

From 9.4K App Store ratings

What we love

  • 💯 Reliable and easy to use
  • 🕰️ Quick setup and activation
  • 📞 Good call quality
  • 💳 Affordable subscription options

Room to improve

  • 🔍 Lack of transparency around pricing and features
  • 🚫 Unexpected charges and hidden fees
  • 🔌 Unreliable connectivity and service disruptions
  • 🔒 Account and number management issues
  • 🤖 Poor customer support and unresponsive to user feedback

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

Nextline

Reported bugs

3 issues
  • Frequent app crashes and errors
  • Inability to send/receive messages
  • Problems with account restoration and number porting

Requested features

4 requests
  • Ability to change phone numbers easily
  • Improved messaging capabilities including picture/video support
  • Option to disable in-app purchases
  • Detailed usage tracking and analytics

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
7 purchases

Nextline

Subscriptions4
  • Weekly Subscription3 Days trial$4.997 Days
  • Weekly Subscription3 Days trial$7.997 Days
  • Monthly Subscription5 variants$9.991 Month
Show 1 more
  • Annual Subscription$59.991 Year
One-time3
  • 40 Credits$0.99
  • 120 Credits$2.99
  • 150 Credits$3.99

Questions

Is SLYFONE free?
SLYFONE is free to download, with in-app purchases available.
Is Nextline free?
Nextline is free to download, with in-app purchases available.
Which has better reviews, SLYFONE or Nextline?
Nextline is rated higher. SLYFONE averages 4.6 out of 5 from 789 ratings, while Nextline averages 4.7 from 9.4K ratings.
Do SLYFONE or Nextline have ads?
SLYFONE shows ads; Nextline does not.
Which is updated more often, SLYFONE or Nextline?
SLYFONE ships an update every 6 weeks, and Nextline every 2 weeks. Most recently, SLYFONE was updated on September 23, 2026 and Nextline on September 27, 2026.

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