Comparison

SLYFONE vs Second Phone Number

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

Second Phone Number

Obtain a secondary phone number for calls and texts without needing an extra SIM card. Use it for personal or professional purposes, including online marketplaces, dating, and business, while keeping your primary number private. Make affordable international calls and send SMS/MMS with this virtual line.

Highlights
  • Obtain a secondary phone number
  • Make calls and send texts
  • No additional SIM card needed
  • Maintain privacy
  • Affordable international calls
  • Send SMS/MMS
Features
Read full description

Get a virtual US or Canadian phone number in minutes! No extra SIM card or second phone needed. Choose a California, Texas, Florida, New York, Illinois, or another available area code. Call and text from your virtual number over Wi-Fi or mobile data. Call mobile and landline numbers in the US, Canada, and 200+ countries worldwide. Send and receive SMS, and share photos and image through MMS. A SEPARATE NUMBER FOR EVERYDAY COMMUNICATION - Keep your personal and business communication organized with a separate US or Canadian phone number. Perfect for: - Work and business communication; - Customers and clients; - Travel and international communication; - Friends and family; - Personal and business calls and messages. FEATURES - A US or Canadian virtual phone number; - A choice of available local area codes; - Wi-Fi calling; - Calls to mobile and landline numbers; - International calls to supported destinations; - SMS and MMS in the US and Canada; - Photo sharing through MMS; - Contact sync. An active subscription is required to get and use a virtual phone number. Calling and messaging availability may vary by destination and carrier. - Terms of Use: https://sphone.telecom.municorn.com/privacy?app=second-phone - Privacy Policy: https://sphone.telecom.municorn.com/terms?app=second-phone - CCPA: https://telecom.municorn.com/ccpa?app=second-phone - Privacy Supplement: https://telecom.municorn.com/privacy-supplement?app=second-phone - Messaging Policy: https://sphone.telecom.municorn.com/messaging-policy?app=second-phone

Screenshots

SLYFONE4 screens
Second Phone Number4 screens

Verdict

The call

The clearest difference is review sentiment: Second Phone Number at 64% against SLYFONE's 24%. Second Phone Number also leads on ads (none vs shown) and update cadence (fortnightly vs every 6 weeks). SLYFONE's advantage is rating (4.6 vs 4.3) and iOS requirement (15.0 vs 18.0). 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 Second Phone Number sells 19 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

SLYFONE holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 777 and 917 respectively. Written reviews complicate that: 24% of SLYFONE's written reviews are positive against 64% of Second Phone Number'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, Second Phone Number fortnightly. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

Scorecard6 real differences · 5 level
SLYFONE versus Second Phone Number: the parameters behind the verdict, then further details
ParameterSLYFONESecond Phone Number
PriceFreeFree
Rating4.6 (777 ratings) — better4.3 (917 ratings)
Positive reviews23.7% of reviews64.0% of reviews — better
Number of ratings777917 — better
Update frequencyEvery 6 weeksFortnightly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#116 — better
DevicesiPhone, iPod — betteriPhone
Requires iOS15.0 — better18.0
Further details — not scored
Size94 MB126 MB
Age rating4+4+
DeveloperMobileSphere, LtdMunicorn Limited

Customer experience

SLYFONE

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

Second Phone Number

All ratings911 ratings
Positive83.4%
Neutral1.5%
Negative15.0%
Written reviews325 reviews
Positive64.0%
Neutral2.2%
Negative33.8%

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

Second Phone Number

From 917 App Store ratings

What we love

  • 🚀 Fast and easy setup
  • 👍 Convenient and practical
  • 🚀 Reliable and smooth performance
  • 👍 Helpful customer service
  • 🚀 Versatile and feature-rich

Room to improve

  • 🐛 Occasional crashes and bugs
  • ⚠️ Unclear restrictions on app usage
  • 💰 Subscription fees may be high for some users
  • 🔒 Privacy and security concerns
  • ⚠️ Limited number of available phone numbers

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

Second Phone Number

Reported bugs

3 issues
  • Inability to send/receive messages or make calls
  • Crashes when trying to link contacts
  • Verification codes not being delivered

Requested features

4 requests
  • Ability to change phone numbers more frequently
  • Support for more social media and messaging apps
  • Option to delete text message history
  • Local phone number availability for international users

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
19 purchases

Second Phone Number

Subscriptions15
  • Second Phone Premium (week)$4.997 Days
  • Save your number$4.997 Days
  • Second Phone Premium (monthly)$8.991 Month
Show 12 more
  • Second Phone Premium (week)7 Days trial$9.997 Days
  • Second Phone Premium (week)2 variants$9.997 Days
  • Second Phone Premium (week)$14.997 Days
  • Second Phone Number: Call Text$14.997 Days
  • Second Phone Save Number 1yr$23.991 Year
  • Second Phone Premium (monthly)$24.991 Month
  • Monthly Trial3 Days trial$29.991 Month
  • Second Phone Premium (month)$29.991 Month
  • Second Phone Premium (quarter)$49.993 Months
  • Second Phone Premium (yearly)$49.991 Year
  • Second Phone Premium (yearly)3 Days trial$95.991 Year
  • Yearly Plan 2026$95.991 Year
One-time4
  • Change number$4.99
  • Change Number 2+$7.99
  • Change Number 3$14.99
Show 1 more
  • International Calls&SMS$19.99

Questions

Is SLYFONE free?
SLYFONE is free to download, with in-app purchases available.
Is Second Phone Number free?
Second Phone Number is free to download, with in-app purchases available.
Which has better reviews, SLYFONE or Second Phone Number?
SLYFONE is rated higher. SLYFONE averages 4.6 out of 5 from 777 ratings, while Second Phone Number averages 4.3 from 917 ratings.
Do SLYFONE or Second Phone Number have ads?
SLYFONE shows ads; Second Phone Number does not.
Which is updated more often, SLYFONE or Second Phone Number?
SLYFONE ships an update every 6 weeks, and Second Phone Number fortnightly. Most recently, SLYFONE was updated on October 27, 2026 and Second Phone Number on October 28, 2026.

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