# OTP vs Mobile OTP Authenticator

OTP and Mobile OTP Authenticator both sit at 3.6 stars, but that hides the real split: 100% of Mobile OTP Authenticator's written reviews are positive against 0% of OTP's. Mobile OTP Authenticator also leads on in-app purchases (none vs 1). OTP's advantage is ratings volume (18 vs 2) and iOS requirement (9.3 vs 15.6). On price, rating, update cadence and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 3.6 for OTP against 3.5 for Mobile OTP Authenticator. That said, the two scores are not equally well evidenced: OTP has 18 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 0% of OTP's written reviews are positive against 100% of Mobile OTP Authenticator's.

OTP ships an update every 6 months, Mobile OTP Authenticator every 8 months. The most recent releases landed on July 28, 2026 and June 9, 2026 respectively.

## The numbers

| Metric | OTP | Mobile OTP Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (18 ratings)](https://appshunter.io/ios/app/otp-auth/id1436497541/reviews)** | [3.5 (2 ratings)](https://appshunter.io/ios/app/mobile-otp-authenticator/id1451459963/reviews) |
| Number of ratings | **18** | 2 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 8 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 27 MB | 2 MB |
| Requires iOS | **9.3** | 15.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [浩 王](https://appshunter.io/developer/1055265396) | [Albert Parti](https://appshunter.io/developer/534966701) |

## 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 |


### Mobile OTP Authenticator

[App page](https://appshunter.io/ios/app/mobile-otp-authenticator/id1451459963)

Securely manage your two-factor authentication codes. Easily add accounts by scanning QR codes or manual entry. Protect your online accounts with industry-standard HOTP and TOTP algorithms.

**Highlights:** QR code scanning for account setup, Manual account entry, Secure data storage in iOS Keychain, Supports HOTP and TOTP algorithms, Works with popular services like Google, Facebook, Amazon

**In-app purchases:** none


## Frequently asked questions

### Is OTP free?

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

### Is Mobile OTP Authenticator free?

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

### Which has better reviews, OTP or Mobile OTP Authenticator?

OTP is rated higher. OTP averages 3.6 out of 5 from 18 ratings, while Mobile OTP Authenticator averages 3.5 from 2 ratings.

### Do OTP or Mobile OTP Authenticator have ads?

Neither OTP nor Mobile OTP Authenticator shows ads.

### Which is updated more often, OTP or Mobile OTP Authenticator?

OTP ships an update every 6 months, and Mobile OTP Authenticator every 8 months. Most recently, OTP was updated on July 28, 2026 and Mobile OTP Authenticator on June 9, 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.*