# SOTP Authenticator vs Guardian OTP

The clearest difference is in-app purchases: Guardian OTP at none against SOTP Authenticator's 2. SOTP Authenticator's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. SOTP Authenticator sells 2 one-off in-app purchases. Guardian OTP asks for nothing beyond the download.

## The numbers

| Metric | SOTP Authenticator | Guardian OTP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Size | 20 MB | 3 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Anzhela Baroyan](https://appshunter.io/developer/1526016553) | [Austin Prueher](https://appshunter.io/developer/1701687169) |

## What reviewers say

### SOTP Authenticator

[App page](https://appshunter.io/ios/app/sotp-authenticator/id1526068202)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One dollar donation | $0.99 | one-time |
| Five dollar donation | $4.99 | one-time |


### Guardian OTP

[App page](https://appshunter.io/ios/app/guardian-otp/id6459233611)

**In-app purchases:** none


## Frequently asked questions

### Is SOTP Authenticator free?

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

### Is Guardian OTP free?

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

### Do SOTP Authenticator or Guardian OTP have ads?

Neither SOTP Authenticator nor Guardian OTP shows ads.

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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.*