# Salt vs Duo Authenticator

The clearest difference is in-app purchases: Salt at none against Duo Authenticator's 3. Salt also leads on ads (none vs shown) and iOS requirement (10.0 vs 16.6). On price and device support there is nothing between them.

Both are free to download. Duo Authenticator sells 3 in-app purchases, starting at $3.99 per 7 days. Salt asks for nothing beyond the download.

## The numbers

| Metric | Salt | Duo Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (24 ratings)](https://appshunter.io/ios/app/duo-authenticator/id1665454984/reviews)** |
| Number of ratings | — | **24** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 143 MB | 60 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ABHISHEK JAIN](https://appshunter.io/developer/1574687874) | [Petr Polasek](https://appshunter.io/developer/1613323784) |

## What reviewers say

### Salt

[App page](https://appshunter.io/ios/app/salt/id1574687872)

**Features:** macOS Compatibility

**In-app purchases:** none


### Duo Authenticator

[App page](https://appshunter.io/ios/app/duo-authenticator/id1665454984)

Enhance your online security with this multi-factor authentication app. It provides an extra layer of protection for your accounts by generating time-sensitive codes, even when offline. Secure your sensitive information with ease and peace of mind.

**Highlights:** Quick and easy setup, Wide service compatibility, Time-sensitive security codes, Offline code generation, End-to-end encryption, Security code protection

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 Week | $3.99 | per 7 days |
| Premium 1 Month | $9.99 | per month |
| Premium 1 Year | $29.99 | per year |


## Frequently asked questions

### Is Salt free?

Salt is free to download, with no in-app purchases.

### Is Duo Authenticator free?

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

### Do Salt or Duo Authenticator have ads?

Duo Authenticator shows ads; Salt does not.

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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.*