# OTP Auth vs Argus

The clearest difference is in-app purchases: Argus at none against OTP Auth's 1. Argus also leads on review sentiment (100% vs 78%) and update cadence (every 3 days vs every 2 weeks). OTP Auth's advantage is ratings volume (463 vs 2). On price, rating, ads and device support there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.6 for OTP Auth against 4.5 for Argus. That said, the two scores are not equally well evidenced: OTP Auth has 463 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 78% of OTP Auth's written reviews are positive against 100% of Argus's.

OTP Auth ships an update every 2 weeks, Argus every 3 days. The most recent releases landed on July 22, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | OTP Auth | Argus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (463 ratings)](https://appshunter.io/ios/app/otp-auth/id659877384/reviews)** | [4.5 (2 ratings)](https://appshunter.io/ios/app/argus-totp-authenticator/id1542617858/reviews) |
| Number of ratings | **463** | 2 |
| Positive reviews | 77.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 22 MB | 3 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Roland Moers](https://appshunter.io/developer/659877387) | [晖 金](https://appshunter.io/developer/1437361520) |

## What reviewers say

### OTP Auth

[App page](https://appshunter.io/ios/app/otp-auth/id659877384)

Enhance your account security with two-factor authentication on your iPhone and iPad. This app supports numerous popular services and offers robust encryption for all your data. It works offline and prioritizes user privacy by not collecting or transmitting personal information.

**Highlights:** Two-factor authentication support, Encrypted iCloud Sync, Siri and Apple Watch support, Notification Center widget, Safari extension for password pasting, Face ID/Touch ID security, Encrypted backups and import/export

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OTP Auth Pro | $3.99 | one-time |

**What reviewers like**

- 🚀 Simple and effective
- 🔒 Secure with backup/restore
- 👍 Great Apple Watch support
- 👍 Intuitive and user-friendly
- 👍 Customizable icons and folders

**What reviewers complain about**

- 🐛 Occasional sync and widget issues
- 🐛 Apple Watch app needs improvements
- 🐛 Unreliable backup/restore for some users
- 🐛 Crashes and bugs reported by a few

**Reported bugs**

- Sync issues causing data loss
- Widget not displaying codes correctly
- Crashes on certain iOS versions

**Requested features**

- Larger text/font size options
- Alphabetical sorting of accounts
- Automatic account refresh/update
- Ability to edit account details


### Argus

[App page](https://appshunter.io/ios/app/argus-totp-authenticator/id1542617858)

This open-source utility app generates Time-based One-time Passwords (TOTP) for secure authentication. It offers a lightweight, data-protected experience with support for dark mode, iCloud backups, and Apple Watch integration.

**Highlights:** TOTP algorithm support (RFC 6238), Open-source, Lightweight design, Full data protection, Dark mode support, iCloud backup, Apple Watch compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OTP Auth free?

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

### Is Argus free?

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

### Which has better reviews, OTP Auth or Argus?

OTP Auth is rated higher. OTP Auth averages 4.6 out of 5 from 463 ratings, while Argus averages 4.5 from 2 ratings.

### Do OTP Auth or Argus have ads?

Neither OTP Auth nor Argus shows ads.

### Which is updated more often, OTP Auth or Argus?

OTP Auth ships an update every 2 weeks, and Argus every 3 days. Most recently, OTP Auth was updated on July 22, 2026 and Argus on June 5, 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.*