# Authenticator App vs Second Phone, 2nd Call Number

The clearest difference is rating: Authenticator App at 4.5 against Second Phone, 2nd Call Number's 2.3. Authenticator App also leads on update cadence (monthly vs every 7 months). Second Phone, 2nd Call Number's advantage is review sentiment (18% vs 0%). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Authenticator App sells 4 in-app purchases, starting at $4.99 per 7 days and Second Phone, 2nd Call Number sells 5 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Authenticator App holds the better App Store score, 4.5 against 2.3. Both are backed by a comparable volume of ratings — 24 and 9 respectively. Written reviews complicate that: 0% of Authenticator App's written reviews are positive against 18% of Second Phone, 2nd Call Number's, so the app with the better star average is not the one people write more warmly about.

Authenticator App ships an update monthly, Second Phone, 2nd Call Number every 7 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | Authenticator App | Second Phone, 2nd Call Number |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (24 ratings)](https://appshunter.io/ios/app/authenticator-app-duo-secure/id6470662300/reviews)** | [2.3 (9 ratings)](https://appshunter.io/ios/app/second-phone-2nd-call-number/id6477942025/reviews) |
| Number of ratings | **24** | 9 |
| Positive reviews | 0.0% of reviews | **18.2% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 7 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 101 MB | 50 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Apperture Limited](https://appshunter.io/developer/1727867515) | [PIXEL QUEST LIMITED](https://appshunter.io/developer/1796137540) |

## What reviewers say

### Authenticator App

[App page](https://appshunter.io/ios/app/authenticator-app-duo-secure/id6470662300)

Enhance digital security with a multi-factor authenticator app. It provides an extra layer of protection for sensitive accounts and information, working offline for reliable access. Protect email, social media, financial accounts, and more with this user-friendly solution.

**Highlights:** Multi-factor authentication, Offline 2FA code generation, Wide service integration, User-friendly interface, Enhanced account protection

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $4.99 | per 7 days |
| Pro Version | $7.99 | per 7 days |
| Pro Version | $14.99 | per month |
| Pro Version | $39.99 | per year |


### Second Phone, 2nd Call Number

[App page](https://appshunter.io/ios/app/second-phone-2nd-call-number/id6477942025)

Instantly set up a second phone number on your device without needing an extra SIM card. This app provides a private line for personal calls, contact management, and business needs, protecting your main number's privacy.

**Highlights:** Virtual second phone number, No additional SIM card required, Private line for calls, Contact management, Instant setup

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Virtual phone numbers | $6.99 | per 7 days |
| 2 Line Phone: 2nd Call Number | $6.99 | one-time |
| Second Phone, 2nd Call Number | $17.99 | one-time |
| 2 Line Phone: 2nd Call Number | $19.99 | one-time |
| 2 Line Phone: 2nd Call Number | $69.99 | one-time |


## Frequently asked questions

### Is Authenticator App free?

Authenticator App is free to download, with in-app purchases available.

### Is Second Phone, 2nd Call Number free?

Second Phone, 2nd Call Number is free to download, with in-app purchases available.

### Which has better reviews, Authenticator App or Second Phone, 2nd Call Number?

Authenticator App is rated higher. Authenticator App averages 4.5 out of 5 from 24 ratings, while Second Phone, 2nd Call Number averages 2.3 from 9 ratings.

### Do Authenticator App or Second Phone, 2nd Call Number have ads?

Neither Authenticator App nor Second Phone, 2nd Call Number shows ads.

### Which is updated more often, Authenticator App or Second Phone, 2nd Call Number?

Authenticator App ships an update monthly, and Second Phone, 2nd Call Number every 7 months. Most recently, Authenticator App was updated on October 24, 2026 and Second Phone, 2nd Call Number on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*