OTP Auth vs Argus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OTP Auth
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.
- 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
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OTP Auth adds support for two-factor authentication to your iPhone and iPad. It can be used with Dropbox, Facebook, GitHub, Google Mail and many more. Make your accounts safe again! Features: - Ads free - Encrypted iCloud Sync - Siri Support - Apple Watch support - Notification Center widget - Safari extension for pasting passwords into websites - Secure application using Face ID/Touch ID (or password) - Create encrypted backups of all accounts - Import/Export encrypted accounts using AirDrop, iCloud, Dropbox, Mail, ... - Works offline All data stored by OTP Auth is stored using strong AES-256 encryption. This applies for all data. In particular, for both locally stored data as well as data stored in the iCloud Drive (when iCloud Sync is enabled). The password for those files never leaves your device such that noone but you can read your data. OTP Auth does not collect information about you or send them anywhere. You won't be asked to allow access to your contacts or your location. And most important: OTP Auth does not connect to the internet and will not send your accounts to someone else! (Unless you enable iCloud sync where an AES-256 encrypted copy of your accounts is stored in your iCloud Drive. The password for that copy will never leave your phone.) Follow me on Twitter: @otpauth
Argus
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.
- TOTP algorithm support (RFC 6238)
- Open-source
- Lightweight design
- Full data protection
- Dark mode support
- iCloud backup
- Apple Watch compatibility
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Argus is an OTP Mobile App and support the Time-based One-time Password (TOTP) algorithm specified in RFC 6238. - Opensource - Lightwight - Full data protection - Support dark mode - Support otpauth-migration - Support Apple Watch - Support backup in iCloud
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | OTP Auth | Argus |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (463 ratings) — better | 4.5 (2 ratings) |
| Positive reviews | 77.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 463 — better | 2 |
| Update frequency | Every 2 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, iPod, Apple Watch |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 22 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Roland Moers | 晖 金 |
Customer experience
OTP Auth
Argus
Bugs and requests
OTP Auth
Reported bugs
3 issues- Sync issues causing data loss
- Widget not displaying codes correctly
- Crashes on certain iOS versions
Requested features
4 requests- Larger text/font size options
- Alphabetical sorting of accounts
- Automatic account refresh/update
- Ability to edit account details
Argus
Not enough reviews yet to summarise bugs or requests.
In-app purchases
OTP Auth
- OTP Auth Pro$3.99
Argus
No in-app purchases
