# OTP vs TOTP Authenticator

The clearest difference is in-app purchases: TOTP Authenticator at none against OTP's 1. OTP's advantage is device support (4 vs 2) and iOS requirement (9.3 vs 26.2). On price and ads there is nothing between them.

Both are free to download. OTP sells 1 one-off in-app purchase. TOTP Authenticator asks for nothing beyond the download.

## The numbers

| Metric | OTP | TOTP Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (18 ratings)](https://appshunter.io/ios/app/otp-auth/id1436497541/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 27 MB | 3 MB |
| Requires iOS | **9.3** | 26.2 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [浩 王](https://appshunter.io/developer/1055265396) | [Keita Iwasaki](https://appshunter.io/developer/1660454950) |

## What reviewers say

### OTP

[App page](https://appshunter.io/ios/app/otp-auth/id1436497541)

This app generates secure one-time passwords for two-factor authentication on your device. It supports various protocols, allows easy account setup via QR codes or manual entry, and offers robust security features like biometric locks and encrypted backups.

**Highlights:** TOTP & HOTP code generation, QR code scanning for setup, Biometric app lock (Face ID/Touch ID), Encrypted data export/import, Account grouping and organization, Dark Mode support, iCloud sync and backup

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OTPAuth Premium | $1.99 | one-time |


### TOTP Authenticator

[App page](https://appshunter.io/ios/app/totp-authenticator-2fa-otp/id6760251412)

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

**In-app purchases:** none


## Frequently asked questions

### Is OTP free?

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

### Is TOTP Authenticator free?

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

### Do OTP or TOTP Authenticator have ads?

Neither OTP nor TOTP Authenticator 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.*