Comparison

Quo (formerly OpenPhone) 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

Quo (formerly OpenPhone)

This business communication platform integrates calls, texts, and customer data into a single system. It offers AI-powered call answering, flexible routing, and a mini CRM to enhance customer relationships and streamline operations for growing businesses.

Highlights
  • Integrated calls and texts
  • Mini CRM with customer notes
  • AI-powered 24/7 call answering
  • Shared inboxes for team visibility
  • Flexible call routing
  • Customizable contact properties
Features
Currently charting
Read full description

Never lose a customer with Quo. The only phone system that helps businesses continue to build personal customer relationships at scale. Trusted by more than 90,000 companies — from fast-growing startups to Fortune 500s — and rated #1 in customer satisfaction on G2. Quo brings calls, texts, and customer information together in one platform. Bring clarity to every conversation. Shared inboxes, internal notes, and a mini CRM, gives every teammate the visibility and context they need to make sure each customer doesn't get missed. Respond to every customer. Fast. Built-in AI answers calls 24/7, flexible call flows route customers instantly, and custom contact properties ensure you're there when your customer needs you, while never missing a detail. Scale effortlessly as you grow. From your first customer to your thousandth, Quo adapts with you. No complex setup, no additional training, no growing pains. With Quo, it’s never been easier to close more deals, support more customers, and grow your business — without losing the human touch. Terms of use: https://www.quo.com/terms Privacy policy: https://www.quo.com/privacy

About

Second Phone Number'

Obtain a secondary phone number for private calls and texts without needing an extra SIM card. This app allows for international calling and texting, offering a separate line for personal or business use. Keep your primary number private while managing multiple contacts and communications.

Highlights
  • Acquire a second phone number
  • Make private calls and texts
  • International calling and texting
  • Send MMS messages
  • Multiple phone number support
  • Choose numbers from U.S. or Canada area codes
Features
Read full description

NEED A SECOND PHONE NUMBER FOR PRIVATE CALLS AND TEXTS? The Second Phone Number app offers a convenient way to acquire a second phone number for your personal needs without the need for an extra SIM card. This app also enables international calling and texting. You can select a second phone number and make calls without revealing your real number. Maintain your international number for as long as you wish, and add more minutes and SMS to your Second Phone Number balance. Enjoy the cheapest rates for in-app credits to make calls worldwide from your second phone number! Transform your phone into a full-featured business phone with the Second Phone Number App, providing: • Choose any number from almost all area codes across the U.S. or Canada. • Get a second phone number for calls and texting. • Make calls to 100+ countries. • Use the second number to send MMS • Send SMS and view text message history. • Select your second phone number from the list of available numbers. • Access your contacts list and synchronize it with the app. • International calling and messaging using 2nd line. • Support for multiple phone numbers. Note: Some features such as obtaining a second number, international calling, sending SMS/MMS, and multiple numbers require a paid subscription or in-app purchase. With Second Phone Number's multiple number features, you can get an additional 2nd line for various situations: A Dedicated Number for: • Buying or selling on local e-commerce platforms. Use a second number for ads and calls. • Dating. Give a second number to new acquaintances from dating apps. • Signing up online. Keep your private number private with a second number. Share your personal number only with trusted contacts. For everyone else, there's Second Phone Number! Subscription Details: - Purchase one phone number: Auto-renewal (Monthly $9.99 or Yearly $49.99) starts after a 3-day free trial. Additional numbers at $9.99 per month. - Payment will be charged to your iTunes Account upon confirmation of purchase. - Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Manage subscriptions in your iPhone settings. - Unused portion of a free trial period will be forfeited upon subscription purchase. Privacy Policy: https://secondlinenumber.com/privacy-policy Terms of Use: https://secondlinenumber.com/terms-of-use EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Disclaimer: Unlimited or free calls and texts are subject to fair usage. Please refer to our terms of use for details. Experience the convenience of managing personal and business contacts separately with Second Phone Number App!

Screenshots

Quo (formerly OpenPhone)4 screens
Second Phone Number'4 screens

Verdict

The call

The clearest difference is ads: Quo (formerly OpenPhone) at none against Second Phone Number''s shown. Quo (formerly OpenPhone) also leads on review sentiment (34% vs 12%) and update cadence (every 9 days vs every 5 weeks). Second Phone Number''s advantage is rating (4.6 vs 4.4) and ratings volume (46K vs 11K). On price, in-app purchases, monetization model and chart position 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. Quo (formerly OpenPhone) sells 5 in-app purchases, starting at $21.00 per month and Second Phone Number' sells 16 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Second Phone Number' holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 11K and 46K respectively. Written reviews complicate that: 34% of Quo (formerly OpenPhone)'s written reviews are positive against 12% of Second Phone Number''s, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Quo (formerly OpenPhone) ships an update every 9 days, Second Phone Number' every 5 weeks. Both last shipped on November 1, 2026.

Scorecard6 real differences · 5 level
Quo (formerly OpenPhone) versus Second Phone Number': the parameters behind the verdict, then further details
ParameterQuo (formerly OpenPhone)Second Phone Number'
PriceFreeFree
Rating4.4 (11K ratings)4.6 (46K ratings) — better
Positive reviews33.7% of reviews — better11.9% of reviews
Number of ratings11K46K — better
Update frequencyEvery 9 days — betterEvery 5 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#53 — better#124
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.013.0 — better
Further details — not scored
Size139 MB120 MB
Age rating4+4+
DeveloperOpenPhone Technologies IncEverAppsLLC

Customer experience

Quo (formerly OpenPhone)

All ratings10,819 ratings
Positive84.2%
Neutral3.9%
Negative11.9%
Written reviews771 reviews
Positive33.7%
Neutral8.2%
Negative58.1%

Second Phone Number'

All ratings46,188 ratings
Positive89.3%
Neutral3.4%
Negative7.2%
Written reviews270 reviews
Positive11.9%
Neutral3.3%
Negative84.8%

User reviews

Quo (formerly OpenPhone)

From 11K App Store ratings

What we love

  • 🚀 Great phone
  • 👍 Fantastic App
  • 👍 Great app!
  • 👍 Great service
  • 👍 Amazing!

Room to improve

  • 🔇 Unable to mute individual numbers
  • 🐛 SMS notifications don't alert sometimes
  • 🔒 Forced to let AI read all of our messages
  • 🔒 Scam
  • 🔒 Complex Registration

Second Phone Number'

From 46K App Store ratings

What we love

  • 🚀 Efficient app for second phone number
  • 💡 Useful for business and privacy needs
  • 😊 Some users find the app amazing

Room to improve

  • 🐛 Unreliable and buggy performance
  • 🔒 Security and privacy concerns
  • 💰 Expensive subscription, hidden fees
  • ⚠️ Poor customer support and unresponsive developers
  • 🔇 Limited features and functionality

Bugs and requests

Quo (formerly OpenPhone)

Reported bugs

20 issues
  • Messages don't always appear
  • Does Not Work for SMS Verification
  • Bad connection
  • OTP malfunction
  • Issues with calls showing as scam
Show 15 more
  • Muffled sound quality
  • Incorrect notifications
  • Calls not ringing or going to voicemail
  • Texts not sending
  • Dropped calls
  • Syncing issues with contacts
  • Delayed notifications
  • Ringtone issues
  • Billing issues
  • Account blocking
  • Porting issues
  • Inability to delete messages
  • Call quality issues
  • Number showing as spam
  • Inability to search messages by number

Requested features

5 requests
  • Make it Conference Call option
  • Custom Notification Tones
  • Transfer Call & 3 Way
  • Dark mode option
  • Advanced analytics dashboard

Second Phone Number'

Reported bugs

3 issues
  • Numbers randomly deleted or become unusable
  • Texts and calls not working as expected
  • Subscription issues and inability to cancel

Requested features

3 requests
  • Increase daily text message limit
  • Improve message history and notification features
  • Allow users to port and keep their assigned numbers

In-app purchases

5 purchases

Quo (formerly OpenPhone)

Subscriptions5
  • Starter Plan7 Days trial$21.001 Month
  • Starter Plan - 2 Numbers$26.001 Month
  • Starter Plan - 3 Numbers$31.001 Month
Show 2 more
  • Starter Plan - 4 Numbers$51.991 Month
  • Starter Plan - 5 Numbers$64.991 Month
16 purchases

Second Phone Number'

Subscriptions9
  • Second Additional Number Week3 Days trial$5.997 Days
  • 2nd Line3 Days trial$6.997 Days
  • 2nd Phone number3 Days trial$9.991 Month
Show 6 more
  • Second Additional Number Month3 Days trial$9.991 Month
  • Third Additional Number Month3 Days trial$9.991 Month
  • Second Phone Premium - Monthly3 Days trial$11.991 Month
  • International calling app3 Days trial$49.991 Year
  • Second Additional Number Year3 Days trial$49.991 Year
  • Second Phone Premium - Yearly3 Days trial$69.991 Year
One-time7
  • Buy 200 Credits$9.99
  • Get 150 Credits$9.99
  • Change Number$15.99
Show 4 more
  • Get 350 Credits$19.99
  • Get 800 Credits$29.99
  • Get 1200 Credits$49.99
  • Get 2500 credits$89.99

Questions

Is Quo (formerly OpenPhone) free?
Quo (formerly OpenPhone) 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, Quo (formerly OpenPhone) or Second Phone Number'?
Second Phone Number' is rated higher. Quo (formerly OpenPhone) averages 4.4 out of 5 from 11K ratings, while Second Phone Number' averages 4.6 from 46K ratings.
Do Quo (formerly OpenPhone) or Second Phone Number' have ads?
Second Phone Number' shows ads; Quo (formerly OpenPhone) does not.
Which is updated more often, Quo (formerly OpenPhone) or Second Phone Number'?
Quo (formerly OpenPhone) ships an update every 9 days, and Second Phone Number' every 5 weeks. Most recently, Quo (formerly OpenPhone) was updated on November 1, 2026 and Second Phone Number' on November 1, 2026.
Which is more popular, Quo (formerly OpenPhone) or Second Phone Number'?
Quo (formerly OpenPhone) currently peaks at #53 in the App Store charts, and Second Phone Number' at #124. Chart position reflects recent download velocity rather than total install base.

Other comparisons