Comparison

DuoLine vs SMS Online

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

Head to head
About

DuoLine

Obtain a secondary phone number for private calls, business use, or social media verification. Manage multiple lines easily without a second device. Enjoy unlimited calling and international access with robust privacy options.

Highlights
  • Second phone number for private use
  • Business communication line
  • Social media verification codes
  • Unlimited calling
  • International calls
  • Ad-free experience
  • No extra SIM card needed
Features
Read full description

Duo Line is a revolutionary mobile application that provides users with a second phone number to use for private communication or business purposes. With Duo Line, you can make and receive calls . Uninterrupted calls anywhere, local or international, without expensive roaming to recipients' Local phone number. Have a private line second phone number for private calls . - Do you want to get a verification code to register on some social media platforms? It is now very easy to have a second phone number on social media platforms where you can get a verification code for whatsapp, twitter and gmail. # SECOND PHONE NUMBER # * The app offers unlimited calling, allowing users to communicate as much as they want without worrying about extra fees or overages. This feature is especially beneficial for businesses that require a second phone line for customer service or sales. * The app's user-friendly interface makes it easy to manage both phone lines in one place, without the need for a second device. # UNLIMITED # In addition, Duo Line can use these phone numbers for users to register on the Social media platform of their choice. Get ready to sign up for unlimited social media platforms with Duo Line. # PRIVATE PRİVACY # Overall, Duo Line is an excellent solution for anyone who needs a scret second phone number. With its extensive features, user-friendly interface, and robust privacy options, it's the perfect app for private communication, business needs.Try it today and discover the convenience and flexibility that Duo Line can bring to your life. Why Duo Line ? Ad-free experience: Enjoy unlimited calls without being disturbed by ads Real second phone number Private phone number for social media sign-up International phones with second phone number service. Get a good cell phone number without an extra SIM card Any other situations that you don’t want to expose your real phone number. # SMS - Coming Soon! # Sometimes he can untie someone via SMS, but from another number. Soon you will be able to send SMS directly through our app. We will notify you when this feature becomes available.

About

SMS Online

Receive SMS messages securely and privately using virtual phone numbers. Ideal for account verification on various online services and apps, offering a disposable second number for enhanced privacy and convenience.

Highlights
  • Instant disposable numbers
  • Easy SMS reception
  • Simple account verification
  • Enhanced privacy
  • Transparent pricing
  • Virtual numbers for WhatsApp, Telegram, Instagram
Features
Read full description

We offer virtual numbers to receive SMS messages easily and securely. Ensure your online security and privacy with our virtual number service. Perfect for quick and easy SMS reception, our platform is the ideal solution for creating accounts on various services and apps. Enjoy the convenience of a disposable second number. SMS-Virtual provides affordable virtual numbers for both business and personal use. Whether you need a second number for WhatsApp or to verify accounts like Instagram, Telegram, or Google Gmail, SMS-Virtual has you covered. Our services make it simple and cost-effective to get a WhatsApp Virtual Number, Telegram Virtual Number, or a WhatsApp Anonymous Number. Enjoy the convenience and security of virtual numbers with SMS-Virtual, all at the best prices! # Key Features: ・Instant Disposable Numbers: Get a secondary number within seconds for all your online needs. ・Easy SMS Reception: Receive SMS online without needing a physical SIM card. ・Simple Account Verification: Verify accounts on various platforms without using your real phone number. ・Enhanced Privacy: Protect your personal phone number from unwanted exposure. ・Clear Pricing: Enjoy our transparent and fair pricing with no hidden costs. # Steps to Use: ・Select a Country: Choose from the available countries and get a WhatsApp Virtual Number, Telegram Virtual Number, or WhatsApp Anonymous Number. ・Open the App: Launch the WhatsApp, WA Business, Instagram, Telegram, or Google Gmail application. ・Enter the Number: Input the virtual number you received into the application. ・Get the Code: Open the SMS-Virtual app, copy the SMS verification code. ・Verify: Paste the verification code into the application you chose. ・You're All Set: Enjoy using your virtual number in the app! ・Get the SMS directly in the app within 20 minutes. If no SMS is received before the number expires, you won't be charged. With SMS-Virtual's WhatsApp second line or WhatsApp foreign line service, you can manage your WhatsApp Business account with a separate number. This lets you keep your business and personal conversations separate, helping you manage both more effectively. Brand Statement: This app is independent and not affiliated with WhatsApp, Instagram, Telegram, Google Gmail, or other services. The names, trademarks, logos, and banners of these services are the property of their respective owners. All mentioned trademarks, product names, and company logos belong to their respective owners. EULA: https://bit.ly/3WubOwy Privacy Policy: https://bit.ly/4cXtrw9

Screenshots

DuoLine4 screens
SMS Online4 screens

Verdict

The call

The clearest difference is review sentiment: SMS Online at 85% against DuoLine's 0%. SMS Online also leads on rating (4.4 vs 2.0) and ratings volume (107 vs 2). DuoLine's advantage is update cadence (every 8 days vs every 6 months) and iOS requirement (12.0 vs 15.6). On price, ads, 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. DuoLine sells 6 in-app purchases, starting at $4.99 per 7 days and SMS Online sells 6 in-app purchases, starting at $7.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

SMS Online holds the better App Store score, 4.4 against 2.0. That said, the two scores are not equally well evidenced: SMS Online has 107 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of DuoLine's written reviews are positive against 85% of SMS Online's.

UpkeepUpdate frequency

DuoLine ships an update every 8 days, SMS Online every 6 months. Both last shipped on November 12, 2026.

Scorecard5 real differences · 5 level
DuoLine versus SMS Online: the parameters behind the verdict, then further details
ParameterDuoLineSMS Online
PriceFreeFree
Rating2.0 (2 ratings)4.4 (107 ratings) — better
Positive reviews0.0% of reviews85.4% of reviews — better
Number of ratings2107 — better
Update frequencyEvery 8 days — betterEvery 6 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better15.6
Further details — not scored
Size57 MB52 MB
Age rating4+4+
DeveloperSORO SONS BILGI TEKNOLOJISI TICARET LIMITED SIRKETIHuseyin Varelci

Customer experience

DuoLine

All ratings2 ratings
Positive0.0%
Neutral50.0%
Negative50.0%
Written reviews4 reviews
Positive0.0%
Neutral25.0%
Negative75.0%

SMS Online

All ratings108 ratings
Positive83.3%
Neutral0.9%
Negative15.7%
Written reviews212 reviews
Positive85.4%
Neutral0.9%
Negative13.7%

Bugs and requests

DuoLine

Not enough reviews yet to summarise bugs or requests.

SMS Online

Reported bugs

2 issues
  • Subscription issues
  • Delayed or no number delivery

Requested features

2 requests
  • Ability to receive calls
  • Promo code availability

In-app purchases

6 purchases

DuoLine

Subscriptions6
  • 1 Number Weekly$4.997 Days
  • 1 Number Monthly$9.991 Month
  • 3 Number Weekly$12.997 Days
Show 3 more
  • 5 Number Weekly$19.997 Days
  • 3 Number Monthly$24.991 Month
  • 5 Number Monthly$44.991 Month
6 purchases

SMS Online

Subscriptions2
  • Virtual Number Unlimeted SMS$7.997 Days
  • Virtual Number Unlimited SMS$11.991 Month
One-time4
  • Virtual Number 1 Credit$9.99
  • Virtual Number 3 Credit$14.99
  • Virtual Number 5 Credit$19.99
Show 1 more
  • Virtual Number 9 Credit$29.99

Questions

Is DuoLine free?
DuoLine is free to download, with in-app purchases available.
Is SMS Online free?
SMS Online is free to download, with in-app purchases available.
Which has better reviews, DuoLine or SMS Online?
SMS Online is rated higher. DuoLine averages 2.0 out of 5 from 2 ratings, while SMS Online averages 4.4 from 107 ratings.
Do DuoLine or SMS Online have ads?
Neither DuoLine nor SMS Online shows ads.
Which is updated more often, DuoLine or SMS Online?
DuoLine ships an update every 8 days, and SMS Online every 6 months. Most recently, DuoLine was updated on November 12, 2026 and SMS Online on November 12, 2026.

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