Comparison

SMS Arrow vs Second Line Calling/Texting

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

Head to head
About

SMS Arrow

Read full description

SMS Arrow helps you send FREE SMS to any part of the world by registering for an account using your mobile number. Once registered and activating your account, you are eligible to send FREE SMS to your friends and relatives in any part of the world. Unlike other Messenger Apps, SMS Arrow do not need Internet connection for the receiver as it will be using the normal mobile connectivity. We provide a fixed amount of FREE SMS every day based on your profile completion. You can earn more SMS credits by referring your friends to register on SMS Arrow. You will earn additional SMS for each registration from your invitation. Our aim is to simply empower our visitors to send SMS in an easy and quick manner - which is completely free. How is the service free? Its advert based - for each SMS sent we finance the SMS with a small advert that is sent with your SMS. Furthermore, as you use the site, adverts are shown in different placements. What we aim to do is strike the right balance where the functionality to you the visitor is balanced with our advertiser. This makes it a win-win situation for all. As an SMS sender you can also remove adverts by paying for your SMS at low prices. You can also purchase SMS Credits for sending more SMS in a day. Who can use the software? Currently only UAE residents with a valid mobile number will be able to register and use this application. We will soon be launching for other countries as well. Once you register from UAE you can use the application from any part of the world to send any mobile number in the world. Your data and information is maintained highly confidential and will not be shared with any third party. We request you to reach our Terms and Conditions before using the software.

About

Second Line Calling/Texting

Add a second phone number to your device for private texting and calling. Protect your personal number from spam and unwanted calls when dating, selling online, or for any project. Easily manage multiple numbers and contacts within the app.

Highlights
  • Add a second phone number
  • Keep personal number private
  • Unlimited texts and calls (premium)
  • Create multiple numbers
  • Separate contacts
  • Burn temporary numbers
  • Mask caller ID
Features
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Flexible Numbers - Add another phone number on your existing device Keep your personal phone number private Instead of giving out your personal number, create a new one and never worry about privacy or receiving spam calls. Use it for dating, online ads or anything else! Get a number in seconds Getting started is simple! Just download the app and start texting or calling right away Unlimited Texts & Calls With the premium plan, get unlimited texting and calling in the US and Canada Create multiple numbers Stay in control by creating multiple numbers on the same device Unlimited calling, texting and picture messaging Make calls and send and receive messages right from the app, using any of your numbers. Easily switch between your numbers at any time Separate contacts Manage your contacts separately from your phone's contacts Protect your privacy Protect your app with a passcode, Touch ID or Face ID Temporary numbers When you are done with a phone number, simply burn it Mask your caller ID with a new, private, flexible and reliable phone number Flexible Numbers Phone is a second phone number for everyday situations such as dating, relationships and more The best number changer app for private texting and calling! It's just like any other phone number but it protects your carrier number and safeguards your identity. A layer of security between you and the ones you are texting and calling. Flexible Numbers Phone is the perfect temporary number for: • buying things online (like craigslist, ebay, etc) • online dating (stay safe!) • applying for jobs • hosting airbnbs • any other kind of project! Avoid giving out your real carrier number to strangers and give out your Flexible Numbers Phone number instead! To get started download the app and get your new number now! Premium Number Plan: - We offer a monthly premium subscription plan that offers unlimited calls, texts and MMS messages within North America - We also offer a monthly basic subscription plan that offers a phone number for texting and calling within North America - Payment will be charged to iTunes Account at confirmation of purchase and at the end of each month - Your subscription automatically renews unless auto-renewal is turned off at least 24 hours before the end of the current monthly subscription - You can manage your subscription and switch off the auto-renewal by going to your account settings after purchase - You cannot cancel the current subscription during the active subscription period - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable - Privacy Policy: https://flexiblenumbers.com/privacy/ - Terms: https://flexiblenumbers.com/terms/ You may not use the service for sending fake texts, prank texts, spoof texts or for anonymous texting or anonymous calling. The recipient you text or call will not know who you are (unless you tell them), however you are never completely anonymous when texting or making calls. If you break these terms, your device will be banned and your identity might be revealed to the authorities upon request. You must be at least 13 years old to use the service. Not for 911 emergency services. Have questions, problems, or feedback? Contact us at contact@flexiblenumbers.com

Screenshots

SMS Arrow4 screens
Second Line Calling/Texting4 screens

Verdict

The call

The clearest difference is in-app purchases: SMS Arrow at none against Second Line Calling/Texting's 8. SMS Arrow also leads on iOS requirement (10.0 vs 15.6). Second Line Calling/Texting's advantage is update cadence (every 2 months vs every 74 months). On price, ads 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. Second Line Calling/Texting sells 8 in-app purchases, starting at $9.99 per month. SMS Arrow asks for nothing beyond the download.

UpkeepUpdate frequency

SMS Arrow ships an update every 74 months, Second Line Calling/Texting every 2 months. The most recent releases landed on October 2, 2026 and October 14, 2026 respectively.

Scorecard3 real differences · 7 level
SMS Arrow versus Second Line Calling/Texting: the parameters behind the verdict, then further details
ParameterSMS ArrowSecond Line Calling/Texting
PriceFreeFree
Rating—4.2 (2K ratings) — better
Positive reviews—67.6% of reviews
Number of ratings—2K — better
Update frequencyEvery 74 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.6
Further details — not scored
Size20 MB11 MB
Age rating4+4+
DeveloperEssentially PreciseBinaryPattern

Bugs and requests

SMS Arrow

Not enough reviews yet to summarise bugs or requests.

Second Line Calling/Texting

Reported bugs

4 issues
  • Dropped calls
  • Failed message deliveries
  • Disappearing contacts
  • Billing/subscription problems

Requested features

4 requests
  • Ability to send images/videos
  • More free credits/minutes
  • Improved customer support channels
  • Compatibility with newer OS versions

In-app purchases

None

SMS Arrow

No in-app purchases

8 purchases

Second Line Calling/Texting

Subscriptions3
  • Premium Line$9.991 Month
  • Premium Number Plan3 Days trial$9.991 Month
  • Premium Number Plan Upgrade$9.991 Month
One-time5
  • 3 Coin Pack$2.99
  • 8 Coin Pack$5.99
  • 15 Coin Pack$9.99
Show 2 more
  • 25 Coin Pack$13.99
  • 60 Coin Pack$27.99

Questions

Is SMS Arrow free?
SMS Arrow is free to download, with no in-app purchases.
Is Second Line Calling/Texting free?
Second Line Calling/Texting is free to download, with in-app purchases available.
Do SMS Arrow or Second Line Calling/Texting have ads?
Neither SMS Arrow nor Second Line Calling/Texting shows ads.
Which is updated more often, SMS Arrow or Second Line Calling/Texting?
SMS Arrow ships an update every 74 months, and Second Line Calling/Texting every 2 months. Most recently, SMS Arrow was updated on October 2, 2026 and Second Line Calling/Texting on October 14, 2026.

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