# TOTP Authenticator vs Open Authenticator by Skyost

TOTP Authenticator and Open Authenticator by Skyost both sit at 4.7 stars, but that hides the real split: 66% of TOTP Authenticator's written reviews are positive against 0% of Open Authenticator by Skyost's. TOTP Authenticator also leads on ratings volume (182 vs 12). On price, rating, update cadence 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 and Open Authenticator by Skyost sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for TOTP Authenticator against 4.6 for Open Authenticator by Skyost. That said, the two scores are not equally well evidenced: TOTP Authenticator has 182 ratings behind it against 12, so its average is the more settled of the two. Written reviews are what separate them: 66% of TOTP Authenticator's written reviews are positive against 0% of Open Authenticator by Skyost's.

TOTP Authenticator ships an update every 2 weeks, Open Authenticator by Skyost fortnightly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | TOTP Authenticator | Open Authenticator by Skyost |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (182 ratings)](https://appshunter.io/ios/app/totp-authenticator/id1625641322/reviews)** | [4.6 (12 ratings)](https://appshunter.io/ios/app/open-authenticator-by-skyost/id6479272927/reviews) |
| Number of ratings | **182** | 12 |
| Positive reviews | **65.8% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 24 MB | 56 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac, Apple Watch** | iPhone, iPad, iPod, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Sparrow Code LTD](https://appshunter.io/developer/1617623165) | [Hugo Delaunay](https://appshunter.io/developer/1456648264) |

## What reviewers say

### 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 |


### Open Authenticator by Skyost

[App page](https://appshunter.io/ios/app/open-authenticator-by-skyost/id6479272927)

This app generates Time-Based One-Time Passwords (TOTPs) to enhance online account security through two-factor authentication. It offers cross-platform syncing, a self-hostable backend, and an intuitive interface for managing your security codes.

**Highlights:** Generates Time-Based One-Time Passwords (TOTPs), Enhances online account security with 2FA, Cross-platform token syncing, Self-hostable backend option, Fast and easy-to-use interface, Open-source and free for local use

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Contributor Plan: Monthly | $0.99 | per month |
| Contributor Plan: Annual | $9.99 | per year |


## Frequently asked questions

### Is TOTP Authenticator free?

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

### Is Open Authenticator by Skyost free?

Open Authenticator by Skyost is free to download, with in-app purchases available.

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

TOTP Authenticator is rated higher. TOTP Authenticator averages 4.7 out of 5 from 182 ratings, while Open Authenticator by Skyost averages 4.6 from 12 ratings.

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

Neither TOTP Authenticator nor Open Authenticator by Skyost shows ads.

### Which is updated more often, TOTP Authenticator or Open Authenticator by Skyost?

TOTP Authenticator ships an update every 2 weeks, and Open Authenticator by Skyost fortnightly. Most recently, TOTP Authenticator was updated on November 3, 2026 and Open Authenticator by Skyost on November 4, 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.*