Comparison

Ring4 vs SLYFONE

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

Head to head
About

Ring4

Create a private second phone line for texting and calling without using your personal number. Ideal for online selling, dating, or business, it offers features like call recording and local area codes. Avoid roaming charges by calling over Wi-Fi.

Highlights
  • Multiple private phone lines
  • Call recording
  • Local area codes
  • Private video calling
  • Voicemail
  • Block unwanted calls
Features
Read full description

Start texting and calling on your new private line. Built for people looking for privacy, a local number, and separation between personal and public life. No carrier plan needed. Ring4 can be used like a prepaid phone card. Text, picture message, and call anywhere in the US, Canada, and UK. Avoid using your Cell phone minutes like other apps. Call and text over Wi-Fi to eliminate roaming charges when travelling. Connect a local eSIM and use your Ring4 number anywhere you have cellular data service. Add private video calling, call recording, voicemail, local area codes, and much more – MULTIPLE PHONE LINES: Set up a number for personal, business, and online selling. CALL RECORDING: Start recording on any line and RARE AREA CODES: San Francisco (415), New York (212), Los Angeles (310). What’s the best way to look like a local? Get a rare number that others can’t. Shhhh… VIDEO CALLS: Start video calls when selling online with a one-time link. Great for online selling or sharing a real estate property tour. PROTECT YOUR PRIVACY: Do you trust loyalty programs to not sell your number? You shouldn’t. Receive verification codes (2FA) and promotional messages for your favorite brands with a private second line. BLOCK CALLS: If you're done with your temporary line, or someone is bothering you, simply delete it and grab a new one. No trip to the store, questions from the salesperson, one click, and you're done. VOICEMAIL: Stay professional with a greeting that matches your private second line's purpose. SAVE CELL MINUTES & DATA: Ring4 does *NOT* use your cell phone minutes for calling, like some other apps. Connect to WiFi to make VoIP calls wherever you are. – WHY USE a 2nd PRIVATE PHONE NUMBER? -- ONLINE DATING: Use a second number to text and call without sharing your real cell phone. RENTING: Message tenants, renters, and landlords. Share a room for rent online using a private number, keeping your personal cell phone number confidential. SELLING ONLINE: Keep your cell phone off public listings by texting buyers from a second line you can silence or replace. MARKETPLACE LISTING: Never give your real cell phone number out online. LOYALTY PROGRAMS: Stop loyalty programs from selling your personal cell phone. Signup for online services with your new 2nd line. BUSINESS: Rule #1 of starting a business. Never give out your personal cell phone, and definitely do not put it on your website. This can never be undone, get a 2nd number today for your new idea, your new business before it’s too late. – NO CONTRACTS: Start with a new US or UK temporary number for 7-days. Add a monthly subscription to keep the number forever. (fair use limits apply) FREE INBOUND TEXTS & CALLING: Inbound calls and texts are always free. TRANSPARENT PRICING: Subscriptions unlock 3,000 text messages and calls a month. (counted daily) • 5 credits to start calling in the US or internationally • 5 credits to start a video meeting • 1 credit to send a text message – IMPORTANT: Emergency calls and texts to 911 are not supported. Texts to/from short codes might not always be supported. The trial may include free usage and is intended for one-time use. SUBSCRIPTION DETAILS: Subscriptions automatically renew unless cancelled 24 hours in advance and may be managed by the user in Account Settings after purchase. THE FINE PRINT: Terms of use: https://www.ring4.com/terms-and-conditions Privacy Policy: https://www.ring4.com/privacy-policy – Looking for more than 3 numbers or higher text and calling plans, visit ring4.com/business to learn about our team plans.

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

Screenshots

Ring44 screens
SLYFONE4 screens

Verdict

The call

The clearest difference is ads: Ring4 at none against SLYFONE's shown. Ring4 also leads on review sentiment (57% vs 24%) and ratings volume (2.9K vs 776). SLYFONE's advantage is rating (4.6 vs 4.4). On price, update cadence, 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. Ring4 sells 10 in-app purchases, starting at $9.99 per month and SLYFONE sells 7 in-app purchases, starting at $14.99 per 3 months. 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 — 2.9K and 776 respectively. Written reviews complicate that: 57% of Ring4's written reviews are positive against 24% of SLYFONE's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Ring4 ships an update every 5 weeks, SLYFONE every 6 weeks. The most recent releases landed on October 24, 2026 and October 23, 2026 respectively.

Scorecard4 real differences · 6 level
Ring4 versus SLYFONE: the parameters behind the verdict, then further details
ParameterRing4SLYFONE
PriceFreeFree
Rating4.4 (2.9K ratings)4.6 (776 ratings) — better
Positive reviews56.8% of reviews — better23.7% of reviews
Number of ratings2.9K — better776
Update frequencyEvery 5 weeks — betterEvery 6 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size105 MB94 MB
Age rating4+4+
DeveloperRing4, LLCMobileSphere, Ltd

Customer experience

Ring4

All ratings2,913 ratings
Positive82.9%
Neutral4.6%
Negative12.5%
Written reviews519 reviews
Positive56.8%
Neutral5.8%
Negative37.4%

SLYFONE

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

User reviews

Ring4

From 2.9K App Store ratings

What we love

  • 👍 Great service
  • 🚀 Cheap and affordable
  • 🚀 Efficient connectivity
  • 👍 Excellent app for business and staying in touch

Room to improve

  • 🐛 Accounts suspended under false terms
  • 🐛 Unreliable service, unable to make calls or send texts
  • 🐛 Deceptive pricing and hidden fees
  • 🐛 Poor customer support and unresponsive

SLYFONE

From 776 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

Bugs and requests

Ring4

Reported bugs

4 issues
  • Accounts being limited or disabled for no reason
  • Credits not being properly credited
  • Inability to generate new numbers
  • Frequent app crashes and service interruptions

Requested features

3 requests
  • Ability to port numbers away from the app
  • Improve text messaging functionality
  • Provide a free trial period

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

In-app purchases

10 purchases

Ring4

Subscriptions6
  • Unlimited Talk & Text for French Mobile Phone Number - Line #1$9.991 Month
  • Unlimited Talk & Text for English Mobile Phone Number - Line #1$9.991 Month
  • Unlimited Talk & Text for US/CA Number - Line #1$9.991 Month
Show 3 more
  • Unlimited Talk & Text for US/CA Number - Line #2$9.991 Month
  • Unlimited Talk & Text for US/CA Number - Line #3$9.991 Month
  • Unlimited Talk & Text for US/CA Selected Number - Line #1$14.991 Month
One-time4
  • Package of 10 credits$0.99
  • Package of 40 credits$3.99
  • Package of 100 credits$8.99
Show 1 more
  • Package of 250 credits$19.99
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

Questions

Is Ring4 free?
Ring4 is free to download, with in-app purchases available.
Is SLYFONE free?
SLYFONE is free to download, with in-app purchases available.
Which has better reviews, Ring4 or SLYFONE?
SLYFONE is rated higher. Ring4 averages 4.4 out of 5 from 2.9K ratings, while SLYFONE averages 4.6 from 776 ratings.
Do Ring4 or SLYFONE have ads?
SLYFONE shows ads; Ring4 does not.
Which is updated more often, Ring4 or SLYFONE?
Ring4 ships an update every 5 weeks, and SLYFONE every 6 weeks. Most recently, Ring4 was updated on October 24, 2026 and SLYFONE on October 23, 2026.

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