# Open Authenticator vs TOTP Authenticator

The clearest difference is in-app purchases: Open Authenticator at none against TOTP Authenticator's 4. Open Authenticator also leads on review sentiment (100% vs 66%) and rating (5.0 vs 4.7). TOTP Authenticator's advantage is ratings volume (174 vs 1) and device support (5 vs 2). On price and ads there is nothing between them.

Both are free to download. TOTP Authenticator sells 4 in-app purchases, starting at $5.99 per 7 days. Open Authenticator asks for nothing beyond the download.

Open Authenticator holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: TOTP Authenticator has 174 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of Open Authenticator's written reviews are positive against 66% of TOTP Authenticator's.

## The numbers

| Metric | Open Authenticator | TOTP Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/open-authenticator/id1583588049/reviews)** | [4.7 (174 ratings)](https://appshunter.io/ios/app/totp-authenticator/id1625641322/reviews) |
| Number of ratings | 1 | **174** |
| Positive reviews | **100.0% of reviews** | 66.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 11 days |
| Monetization | **Free** | Free with in-app purchases |
| Size | 24 MB | 24 MB |
| Requires iOS | **12.1** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Odroe Inc.](https://appshunter.io/developer/1477720111) | [Sparrow Code LTD](https://appshunter.io/developer/1617623165) |

## What reviewers say

### Open Authenticator

[App page](https://appshunter.io/ios/app/open-authenticator/id1583588049)

This application generates secure, time-based one-time passwords for authentication. Its open-source code is community-reviewed, ensuring no backdoors and consistent TOTP compliance for robust security.

**Highlights:** HMAC-based One-time Password generation, TOTP compliance, Completely open-source code, Community supervised, No backdoor security

**Features:** macOS Compatibility

**In-app purchases:** none


### TOTP Authenticator

[App page](https://appshunter.io/ios/app/totp-authenticator/id1625641322)

This app generates time-based one-time passwords (TOTP) for enhanced account security. It supports two-factor authentication (2FA) by providing 6-digit codes required by many websites and services for login. The app includes extensive tutorials to guide users through setting up 2FA with various platforms.

**Highlights:** Generates 6-digit TOTP codes, Supports two-factor authentication (2FA), QR code scanning for setup, Manual secret key entry, Over 100 step-by-step setup tutorials, Privacy focused

**Features:** Apple Watch app

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TOTP OTP Codes (1 week) | $5.99 | per 7 days |
| TOTP OTP Codes (1 month) | $9.99 | per month |
| TOTP OTP Codes (1 year) | $59.99 | per year |
| Unlimited TOTP OTP Codes | $79.99 | one-time |


## Frequently asked questions

### Is Open Authenticator free?

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

### Is TOTP Authenticator free?

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

### Which has better reviews, Open Authenticator or TOTP Authenticator?

Open Authenticator is rated higher. Open Authenticator averages 5.0 out of 5 from 1 ratings, while TOTP Authenticator averages 4.7 from 174 ratings.

### Do Open Authenticator or TOTP Authenticator have ads?

Neither Open Authenticator 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.*