Comparison

2nd Phone Number vs Authenticator

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

Head to head
About

2nd Phone Number

Instantly obtain a second phone number for texting and calling, managing two lines on one device. Organize communications with features like Auto-Reply and custom voicemail, ensuring you never miss a message. Enjoy secure, private messaging and access your second line across multiple devices.

Highlights
  • Get a second phone number
  • Unlimited SMS texting
  • Custom voicemail
  • Auto-Reply feature
  • Private messaging
  • Multi-device access
Features
Read full description

Get a second phone number instantly and enjoy the flexibility of managing two lines on one device! Whether for personal or business use, our app provides a dedicated number for texting, chatting, and organizing your contacts, keeping your communications clear and efficient. With this app, you can create a local phone number, send unlimited texts, and set up a custom voicemail—just like your primary line. Stay organized with smart features like Auto-Reply and reminders, ensuring you never miss an important message. Plus, manage all your conversations seamlessly across multiple devices. In addition to serving as a second phone line, the app offers secure and private messaging, allowing you to send unlimited SMS texts effortlessly. Key Features: Get a Second Number A fully functional additional phone line Choose a local area code that suits you Reliable calling over the cellular network Private Messaging Unlimited SMS texting Secure, private conversations anytime Access your second number from multiple devices Subscription Information: To unlock unlimited access to all features, a subscription is required. Payments are processed through your iTunes account, and the subscription renews automatically unless canceled at least 24 hours before the next billing cycle. You can manage or cancel your subscription anytime in your iTunes account settings. Start today and take control of your communication! Privacy Policy: https://docs.google.com/document/d/117Vvi2g02czSDk4KyiLQp6g0jPqL3RbSoiNBwTMt8Qg/edit?tab=t.0 Terms of Use: https://docs.google.com/document/d/1x-FV-D6-l0Ady6nyc1Tv0xaRiODH29Cd7Pl45F_p6uU/edit?tab=t.0

About

Authenticator

This app provides free two-factor and multi-factor authentication for your online accounts. It also offers a password manager with autofill, encrypted backups, and a built-in VPN for enhanced digital security.

Highlights
  • Two-Factor Authentication (2FA)
  • Password Manager with Autofill
  • Encrypted Backups
  • Cross-Device Sync
  • Offline Access
  • Built-In VPN Protection
Features
Read full description

The App is your go-to, free solution for managing two-factor (2FA) and multi-factor (MFA) authentication on your iPhone and iPad. Safeguard your online accounts—like Facebook, Google, Instagram, Microsoft, Roblox, and thousands more—using secure 2FA codes. Whether securing emails, social media profiles, or financial accounts, KeyGuard provides reliable and free two-factor authentication. Download it today on your iPhone or iPad to take control of your online security! Why? Goes beyond just two-step verification. It’s a comprehensive solution for managing 2FA codes, passwords, and overall digital security. Whether you’re in need of an authenticator app, a password manager with autofill, or even a built-in VPN, KeyGuard offers unmatched convenience and security. Key Features: Two-Factor Authentication (2FA): Safeguard your accounts with time-based codes (OTP, TOTP). Works perfectly with Google, Facebook, Microsoft, Instagram, and more. Password Manager with Autofill: Safely store, organize, and autofill your passwords. Effortlessly generate strong, unique passwords. Encrypted Backups: Keep your 2FA codes and passwords secure with end-to-end encrypted iCloud backups. Cross-Device Sync: Access your 2FA codes and passwords across your iPhone, iPad, and other Apple devices in real-time. Offline Access: Generate 2FA codes without an internet connection, ensuring continuous protection. Advanced Security Options: Lock the app with Touch ID, Face ID, or a secure PIN for extra security, ensuring only you can access your data. Built-In VPN Protection: Secure your online connection and browse safely with an integrated VPN. Getting Started is Simple: Log in to the account you wish to secure (e.g., Google, Facebook, Amazon). Go to the account's security settings and enable Two-Factor Authentication (2FA). Choose the "Authentication App" option. Scan the QR code with the KeyGuard App. Enter the generated code to confirm the setup. Enable encrypted backups for extra peace of mind. Your Data, Fully Secured App ensures your sensitive data is safe with end-to-end encryption, making sure that only you can access it—whether it’s stored on the cloud or offline. With secure backups, offline access, and seamless device syncing, keeping your data safe has never been easier. Compatible with Thousands of Services Protect your favorite accounts, including Gmail, Discord, Reddit, Twitch, PlayStation, Binance, Coinbase, Shopify, Salesforce, PayPal, LinkedIn, and many others. Download KeyGuard Authenticator App Today! Take charge of your online security now. With features like password management, a VPN, and encrypted backups, KeyGuard is the ultimate tool for safeguarding your accounts. Subscription Details Unlock premium features such as unlimited tokens, advanced password management, and enhanced VPN protection. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends. Manage your subscriptions in the App Store settings. To protect your security and deter refund fraud, we provide Apple with anonymized data about how the app is used. Our full refund policy is explained in our Privacy Policy and Terms of Use. Contact us: bedirhank11@outlook.com Privacy Policy: https://docs.google.com/document/d/1oRxdygmPYDMLOA9lrU9tyxd9XrmEhIdB3zp2awBmmOY/edit?usp=sharing Terms of Use: https://docs.google.com/document/d/1vo6uJR2_pkKJg_zJ8p7Vz4oMJYyI0FEHo2aSS-il00c/edit?usp=sharing

Screenshots

2nd Phone Number4 screens
Authenticator4 screens

Verdict

The call

The clearest difference is monetization model: Authenticator at free with in-app purchases against 2nd Phone Number's subscription. Authenticator also leads on iOS requirement (16 vs 18.6). 2nd Phone Number's advantage is ratings volume (419 vs 8). On price, rating, update cadence and ads 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. 2nd Phone Number sells 5 in-app purchases, starting at $6.99 per 7 days and Authenticator sells 3 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.4 for 2nd Phone Number against 4.5 for Authenticator. That said, the two scores are not equally well evidenced: 2nd Phone Number has 419 ratings behind it against 8, so its average is the more settled of the two.

UpkeepUpdate frequency

2nd Phone Number ships an update every 3 days, Authenticator every 4 days. The most recent releases landed on October 21, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 7 level
2nd Phone Number versus Authenticator: the parameters behind the verdict, then further details
Parameter2nd Phone NumberAuthenticator
PriceFreeFree
Rating4.4 (419 ratings)4.5 (8 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings419 — better8
Update frequencyEvery 3 days — betterEvery 4 days
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPod
Requires iOS18.616 — better
Further details — not scored
Size48 MB11 MB
Age rating4+4+
DeveloperFrederick GrunstCrossing Pub

Customer experience

2nd Phone Number

All ratings291 ratings
Positive86.6%
Neutral2.4%
Negative11.0%
Written reviews16 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Authenticator

All ratings8 ratings
Positive87.5%
Neutral12.5%
Negative0.0%

Bugs and requests

2nd Phone Number

Reported bugs

2 issues
  • No call keypad to receive verification code
  • Messaging feature not available despite marketing

Authenticator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

2nd Phone Number

Subscriptions1
  • Any Phone Number for a week!$6.997 Days
One-time4
  • Extra tokens for SMS&CALLS!$6.99
  • Get extra tokens for SMS&CALLS$17.99
  • Get extra tokens for SMS&CALLS$29.99
Show 1 more
  • Get extra tokens for SMS&CALLS$69.99
3 purchases

Authenticator

Subscriptions2
  • Weekly Trial Subscription3 Days trial$6.997 Days
  • Weekly Subscription$6.997 Days
One-time1
  • Premium$3.99

Questions

Is 2nd Phone Number free?
2nd Phone Number is free to download, with in-app purchases available.
Is Authenticator free?
Authenticator is free to download, with in-app purchases available.
Which has better reviews, 2nd Phone Number or Authenticator?
Authenticator is rated higher. 2nd Phone Number averages 4.4 out of 5 from 419 ratings, while Authenticator averages 4.5 from 8 ratings.
Do 2nd Phone Number or Authenticator have ads?
Neither 2nd Phone Number nor Authenticator shows ads.
Which is updated more often, 2nd Phone Number or Authenticator?
2nd Phone Number ships an update every 3 days, and Authenticator every 4 days. Most recently, 2nd Phone Number was updated on October 21, 2026 and Authenticator on October 28, 2026.

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