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The best iPhone apps for a second phone number in 2026 depend on whether you need a VoIP inbox or a true cellular line: Google Voice is the best free general choice, Burner is best for disposable privacy, Hushed for multiple numbers, Sideline for carrier-network calling, Quo for teams, and TextNow for a budget option with policy caveats.
The recommendations reflect official product information and U.S. App Store listings reviewed on August 12, 2026. Prices, trials, iOS requirements, number availability, and verification policies can change, and no hands-on call-quality or verification-code testing was performed.
Key takeaways
- Google Voice is the best free general-purpose choice for a U.S. second number, with calls, texts, voicemail, spam filtering, and voicemail transcription.
- Burner is the best disposable privacy number, but Burner requires Wi-Fi or mobile data and is not compatible with SMS short codes or emergency 911 calls.
- Hushed supports multiple U.S., Canadian, and U.K. numbers, with observed starting prices of $7.99 per month for prepaid, $6.99 per month for unlimited, and $8.99 per month for pay-as-you-go plans on August 12, 2026.
- Sideline is the strongest app choice for carrier-network calling because Sideline says it uses the cellular network rather than VoIP, but Sideline is iPhone-only and paid features are purchased in-app.
- Quo, formerly OpenPhone, is built for shared business numbers, routing, business hours, and team administration rather than casual disposable use.
- A carrier eSIM or physical SIM is more appropriate than an app-based VoIP number when the reader needs conventional cellular behavior, broader verification compatibility, or a line independent of an app.
Which second-number option should you choose?
Choose the service according to the job the second number must perform, not according to app-store popularity alone. Google Voice is the practical default for a free U.S. number, Burner is better for short-lived contacts, Hushed is better for multiple private numbers, Sideline is better for carrier-network calling, Quo is better for teams, and TextNow is better when minimizing recurring cost matters most.
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| Option | Best for | Network model | What you get | Main limitation |
|---|---|---|---|---|
| Google Voice | Free general use in the U.S. | App-based VoIP with iPhone and computer access | Calls, texts, voicemail, spam filtering, and voicemail transcription | Personal availability is U.S.-focused; some services reject VoIP verification |
| Burner | Temporary privacy and compartmentalized contacts | Wi-Fi or mobile data | Selectable numbers that can be deleted or replaced | No SMS short-code compatibility or emergency 911 calling |
| Hushed | Multiple private or international numbers | Internet calling and messaging | U.S., Canadian, and U.K. numbers, multiple lines, forwarding, and flexible plans | Call quality depends on the internet connection |
| Sideline | A paid second line using carrier-network calling | Carrier cellular network, according to Sideline | Unlimited SMS/MMS, caller ID, voicemail, spam controls, notes, and porting | iPhone-only; current pricing is shown through in-app purchases |
| Quo | Freelancers, businesses, and teams | Business VoIP phone system | Shared numbers, business hours, voicemail forwarding, and additional numbers | Not a cheap casual privacy line; virtual phone services do not provide emergency calling |
| TextNow | Lowest-cost app-based line | Wi-Fi calling and texting, with optional wireless service | Free U.S. local number, optional wireless plans, and international calling | Number retention, ads, verification, geography, and wireless rules vary by account or plan |
| Carrier eSIM or physical SIM | A true cellular second line | Mobile carrier network | Conventional calls and SMS/MMS on a second number | Requires a compatible, unlocked iPhone, carrier support, and a separate plan or fee |
What is the difference between an app-based number and a true cellular second line?
An app-based number is usually a VoIP line that sends calls and messages through an app over Wi-Fi or mobile data, while a true second cellular line is provided by a carrier through a SIM or eSIM. The two options can look similar in everyday use, but they differ in connectivity, verification compatibility, emergency calling, and how calls behave when the app or data connection is unavailable.
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App-based VoIP numbers
VoIP apps are best when the reader needs privacy, a temporary contact point, a business inbox, or access to the same conversations from more than one device. A VoIP number may continue working on an iPhone and computer without requiring a second physical handset, but the number depends on the provider’s service and an internet connection.
VoIP numbers are not universally accepted for identity checks. Banks, social networks, financial services, and other websites may distinguish between mobile numbers and VoIP numbers, so no app in this comparison should be advertised as a guaranteed recipient for every verification code.
Carrier eSIM or physical SIM
A carrier line is the better choice when the second number must behave like a conventional mobile number, work through the cellular network without opening a separate app, or have the broadest possible compatibility with mobile-number checks. A carrier line usually costs more than a free VoIP option and still depends on carrier coverage, device compatibility, unlocking, regional rules, and plan fees.
Apple’s Dual SIM documentation, dated April 14, 2026, says compatible iPhones can use two phone numbers and make and receive calls on both lines while sending and receiving iMessage, SMS, and MMS. eSIM support begins with iPhone XS, iPhone XS Max, and iPhone XR or later, while iPhone 13 and later support two eSIMs. A physical SIM plus an eSIM is another supported configuration on compatible models.
| Need | Better fit | Reason |
|---|---|---|
| Free U.S. number for ordinary calls and messages | Google Voice | Provides the core number, calling, texting, and voicemail features without a recurring app subscription for personal U.S. use. |
| Number for a listing, dating contact, or short project | Burner | The number can be replaced or deleted when the contact no longer needs access. |
| Several private numbers or supported international numbers | Hushed | Hushed supports multiple lines and numbers in the U.S., Canada, and U.K. |
| Calling where cellular service is available but data is unreliable | Sideline or a carrier line | Sideline says it uses the carrier cellular network; a carrier SIM or eSIM is the more direct cellular option. |
| Shared business number for several people | Quo | Quo includes team-oriented features such as shared numbers, business hours, and call handling. |
| Lowest recurring cost | TextNow or Google Voice | TextNow advertises a free local number and Google Voice is the stronger free general-purpose option for U.S. personal use. |
Is Google Voice the best free second-number app?
Google Voice is the best free all-around second-number app for most U.S. readers who need ordinary calling, texting, and voicemail rather than a guaranteed mobile number.
Google Voice provides a U.S. phone number for calls, text messages, and voicemail. The iPhone app can synchronize conversations across smartphones and computers, preserve searchable call, text, and voicemail history, filter spam, and transcribe voicemail. Google’s availability guidance for Google Voice says personal Google Voice is currently available in the United States, while Google Workspace availability varies by market.
Google Voice suits a side project, family communications, casual business line, or long-term secondary inbox better than a number that must pass every automated identity check. Some online services reject Google Voice and other VoIP numbers for verification, including certain financial, social, and short-code workflows.
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Is Burner the best disposable privacy number?
Burner is the best choice when the second number should be temporary, replaceable, or separated from the reader’s personal identity and primary phone line.
Burner lets users select an area code, create a number, call and text over Wi-Fi or mobile data, and delete or replace the number when the interaction ends. A Burner disposable number is a natural fit for online selling, dating, travel-related contacts, short-term projects, classified listings, and any situation where publishing a primary number would create unnecessary follow-up.
According to Apple’s U.S. App Store listing reviewed on August 12, 2026, Burner showed a 4.7 rating from approximately 93,000 ratings, required iOS 17 or later, and displayed subscription options with a three-day trial. Ratings, iOS requirements, trials, and subscription terms can change, so verify the current listing and purchase screen before subscribing. Burner’s plans and pricing documentation is the better place to check the provider’s current plan structure.
Burner requires Wi-Fi or mobile data. Burner is not compatible with SMS short-code services and does not support emergency 911 calls, so a Burner number should not replace a primary cellular line or be used as the only emergency-calling method.
Is Hushed the best app for multiple private numbers?
Hushed is the best fit for readers who want multiple private numbers, supported U.S., Canadian, or U.K. numbers, or a choice between prepaid and recurring plans.
Hushed supports calling and messaging over internet data, custom voicemail greetings, call forwarding, and multiple numbers on one iPhone. Hushed’s support material says numbers are available in more than 300 area codes across the United States, Canada, and the United Kingdom. That makes Hushed useful for separating shopping, dating, work, family, and travel contacts without carrying several phones.
According to Hushed’s official pricing page on August 12, 2026, observed starting prices were $7.99 per month for prepaid plans, $6.99 per month for unlimited plans, and $8.99 per month for pay-as-you-go plans. Those are observed prices rather than permanent guarantees; plan availability, billing channels, promotions, taxes, and regional pricing can change.
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Hushed’s flexibility comes with the normal VoIP trade-off. Call quality and availability depend on Wi-Fi or mobile data, and an internet number should not be treated as an emergency-calling replacement. Readers who need a number accepted by a particular bank or online service should confirm that service’s mobile-number policy before buying.
Rank #3
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- eSIM: During activation, you can choose to use your physical SIM or switch to eSIM. The eSIM is available on iPhone 11 and newer models, Google Pixel 2 and higher, and compatible Samsung devices.
Is Sideline the best carrier-network second line?
Sideline is the strongest app-based recommendation for readers who prioritize carrier-network calling over a purely VoIP calling path and are willing to pay for a dedicated second number.
Sideline says it operates on the carrier cellular network rather than VoIP. Sideline’s iPhone listing describes unlimited SMS and MMS, caller ID, custom voicemail, auto-reply, spam blocking, conversation notes, number porting, and use cases including work, marketplace sales, and client communications.
The carrier-network claim makes Sideline a logical choice for areas where the iPhone has cellular service but Wi-Fi or mobile data is unreliable. The claim does not make Sideline identical to a carrier-issued eSIM: Sideline remains an app-based service with its own account, feature, and availability rules.
Sideline is free to download with in-app purchases, and the current subscription price should be checked in the live iPhone purchase screen. Sideline is iPhone-only, so Sideline is not the best recommendation for readers who need the same second number on Android, a desktop, or a team administration dashboard.
Is Quo, formerly OpenPhone, the best second number for business?
Quo, formerly OpenPhone, is the best choice for a freelancer, small business, or team that needs a managed business phone system rather than a cheap personal privacy number.
Quo supports virtual numbers, shared phone numbers, business hours, voicemail forwarding, additional numbers, and team-oriented administration. Quo is appropriate when several people need to answer one business number, when calls need routing or shared handling, or when a business wants a more structured phone workflow than a personal VoIP inbox provides. Quo’s business phone-system feature page describes those shared and workflow features.
Quo’s referenced feature information lists each additional number at $5 per month, while Quo’s pricing documentation describes Starter, Business, and Scale plans. The $5 additional-number figure and plan details should be rechecked at publication because business pricing can change by plan, billing term, or promotion.
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Is TextNow the best budget second-number app?
TextNow is the best budget alternative for readers whose main goal is a free or very low-cost local number and who can accept account-policy caveats.
TextNow’s U.S. App Store listing advertises a free local phone number, free Wi-Fi calling and texting, optional wireless service, no fixed contracts, and low-cost international calling to more than 230 countries. TextNow explicitly positions the service for second lines, business use, side hustles, and personal communication.
TextNow’s iPhone support guide explains that the experience can differ when a user is using TextNow’s wireless network. Check current wireless compatibility before treating TextNow as a cellular substitute.
TextNow requires more policy checking than Google Voice before a reader relies on the number long term. Number-retention rules, advertising, verification-code support, geographic availability, and wireless compatibility can differ by account and plan. Review the current in-app terms before using a free TextNow number for banking, identity, or authentication.
When is an app not enough?
An app is not enough when the reader needs a conventional carrier number, broad compatibility with account verification, cellular operation independent of an app, or a dependable emergency-calling path.
Use Apple’s Dual SIM feature with a carrier eSIM or physical SIM when those requirements matter. Confirm that the iPhone is compatible and unlocked, that the carrier supports the desired configuration, that the region permits the service, and that the plan includes the voice and SMS features needed. A data-only travel SIM may provide internet access without providing the voice number or SMS capability required for a second phone line.
A carrier line is not automatically free or universally available. The carrier may charge for the additional line, require a particular plan, restrict eSIM activation by country, or impose device and account requirements. Apple confirms the technical Dual SIM capability, but the carrier determines the available plan and number options.
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Second-number apps cannot be guaranteed to receive every verification code because many services reject VoIP numbers or restrict SMS short codes.
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Google Voice, Burner, Hushed, and TextNow should therefore be treated as unsuitable for a specific bank, financial account, social network, or authentication workflow unless that service explicitly accepts the number. A carrier-issued mobile line is generally the more dependable choice when verification is a central requirement, but readers should still confirm the target service’s rules.
Burner explicitly warns about SMS short-code incompatibility. TextNow’s number and account policies can vary, and the same general caution applies to other virtual-number providers. The right answer is to test or confirm compatibility with the particular service before moving an important account to the second number.
Can these apps replace emergency calling?
Readers should not use a VoIP second-number app as their only emergency-calling method.
Burner explicitly excludes emergency 911 calls. Quo’s documentation says virtual phone-number providers do not offer emergency call services. Google Voice, Hushed, and TextNow also depend on app, account, and data availability, while Sideline’s carrier-network claim does not make every app-based feature equivalent to a primary carrier line. Keep a conventional cellular line available for emergency communication.
How should you choose and set up a second iPhone number?
- Decide whether the number is temporary or permanent. Pick Burner for a disposable contact, Google Voice or TextNow for a low-cost app inbox, Hushed for multiple numbers, and a carrier eSIM for a conventional long-term mobile line.
- Decide whether the number must work outside the iPhone app. A team, computer, or shared-inbox requirement favors Google Voice, Hushed, or Quo. A requirement for two lines in the iPhone’s normal Phone and Messages experience favors Dual SIM through a carrier.
- Check the geography. Google Voice personal availability is U.S.-focused. Hushed lists U.S., Canadian, and U.K. numbers. TextNow’s free local-number offer is presented through its U.S. listing. Number availability can depend on the country, area code, and account.
- Check the network requirement. Burner and Hushed require internet connectivity. Sideline says it uses the carrier cellular network. A carrier SIM or eSIM uses the carrier network directly.
- Check verification and emergency requirements before subscribing. Do not assume that a VoIP number works with short codes, banks, or 911. Keep a primary cellular line when those functions matter.
- Check current price and compatibility immediately before purchase. App-store ratings, iOS requirements, free trials, subscription prices, number-retention rules, and feature availability are changeable. For a carrier line, check iPhone model, unlocking, carrier, regional support, and voice/SMS inclusion.
How were these iPhone second-number apps ranked?
This ranking is based on official product information and U.S. App Store listings reviewed on August 12, 2026. The ranking is use-case based, not a controlled laboratory ranking: no hands-on call-quality, coverage, deliverability, or verification-code testing was performed.
The practical order is Google Voice for free general use, Burner for disposable privacy, Hushed for multiple numbers and international flexibility, Sideline for a carrier-network second line, Quo for business and team workflows, and TextNow for a budget alternative subject to current policy checks. The best choice changes if the reader needs a true cellular line instead of an app-based VoIP number.
Frequently Asked Questions
Can I use a second-number app for bank verification?
Second-number apps cannot be guaranteed to work for bank verification because many financial and online services reject VoIP numbers or SMS short codes. Use a carrier-issued mobile line when a particular account requires dependable mobile-number verification, and confirm the target service’s policy first.
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Do iPhone second-number apps work without Wi-Fi?
Most app-based second numbers require Wi-Fi or mobile data. Burner and Hushed depend on internet connectivity, while Sideline says it uses the carrier cellular network; a carrier SIM or eSIM is the most direct option when the line must work as a normal mobile line.
Can I call 911 from a second-number app?
Do not rely on a second-number app as your only emergency-calling method. Burner explicitly does not support emergency 911 calls, and Quo states that virtual phone providers do not offer emergency calling.
Which second-number app works internationally?
Hushed supports U.S., Canadian, and U.K. numbers, while personal Google Voice availability is U.S.-focused and TextNow’s free local-number offer is presented through its U.S. listing. Availability still depends on the country, area code, account, and current plan.
The Bottom Line
Bottom line: Start with Google Voice for a free U.S. second number, choose Burner for a temporary privacy line, Hushed for multiple numbers, Sideline for carrier-network calling, Quo for team business use, and TextNow for the lowest-cost alternative. Choose a carrier eSIM or physical SIM when verification, conventional cellular behavior, or emergency access matters more than app convenience.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
