# Authenticator Duo vs Air Printer

The clearest difference is monetization model: Air Printer at free with in-app purchases against Authenticator Duo's subscription. On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Authenticator Duo sells 3 in-app purchases, starting at $6.99 per 7 days and Air Printer sells 1 in-app purchase, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 3.9 for Authenticator Duo against 3.8 for Air Printer. Both are backed by a comparable volume of ratings — 7 and 12 respectively.

Both ship on a similar rhythm, roughly daily. The most recent releases landed on September 30, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Authenticator Duo | Air Printer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (7 ratings)](https://appshunter.io/ios/app/authenticator-duo-two-factor/id6615062059/reviews)** | [3.8 (12 ratings)](https://appshunter.io/ios/app/air-printer-smart-pdf-scanner/id6621181390/reviews) |
| Number of ratings | 7 | **12** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Daily | Daily |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 16 MB | 34 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Shawna Margie](https://appshunter.io/developer/1775558385) | [Anatolio Bombara](https://appshunter.io/developer/1761896521) |

## What reviewers say

### Authenticator Duo

[App page](https://appshunter.io/ios/app/authenticator-duo-two-factor/id6615062059)

This app provides robust two-factor authentication to secure your online accounts. It offers easy setup, management, and backup/sync features using advanced security protocols for peace of mind.

**Highlights:** Two-Factor Authentication (2FA), Easy Setup & Management, Backup & Sync, Advanced Security Protocols, User-Friendly Interface

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro + 3 Days Trial | $6.99 | per 7 days |
| Monthly Pro | $19.99 | per month |
| Annual Pro | $49.99 | per year |


### Air Printer

[App page](https://appshunter.io/ios/app/air-printer-smart-pdf-scanner/id6621181390)

Easily print documents and photos directly from your iPhone or iPad. Scan new documents or use existing files, then select from over 5000 compatible printers to print in seconds. Supports a wide range of file types.

**Highlights:** Scan documents and photos, Print from iPhone/iPad, Supports over 5000 printers, Prints various file types (PDF, DOC, JPG, PNG), Integrated scanner

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access (1 week) | $6.99 | per 7 days |


## Frequently asked questions

### Is Authenticator Duo free?

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

### Is Air Printer free?

Air Printer is free to download, with in-app purchases available.

### Which has better reviews, Authenticator Duo or Air Printer?

Authenticator Duo is rated higher. Authenticator Duo averages 3.9 out of 5 from 7 ratings, while Air Printer averages 3.8 from 12 ratings.

### Do Authenticator Duo or Air Printer have ads?

Neither Authenticator Duo nor Air Printer shows ads.

### Which is updated more often, Authenticator Duo or Air Printer?

Authenticator Duo ships an update daily, and Air Printer daily. Most recently, Authenticator Duo was updated on September 30, 2026 and Air Printer on October 11, 2026.

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