# Open Authenticator by Skyost vs TOTP Authenticator

The clearest difference is device support: Open Authenticator by Skyost at 4 against TOTP Authenticator's 1. Open Authenticator by Skyost also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Open Authenticator by Skyost sells 2 in-app purchases, starting at $0.99 per month and TOTP Authenticator sells 3 in-app purchases, starting at $1.49 per month. Whichever you choose, the download price is not the number that matters.

Open Authenticator by Skyost ships an update fortnightly, TOTP Authenticator every 8 days. Both last shipped on October 14, 2026.

## The numbers

| Metric | Open Authenticator by Skyost | TOTP Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (9 ratings)](https://appshunter.io/ios/app/open-authenticator-by-skyost/id6479272927/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 8 days** |
| Monetization | Free with in-app purchases | — |
| Size | 56 MB | 73 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hugo Delaunay](https://appshunter.io/developer/1456648264) | [COGNIFLY LTD](https://appshunter.io/developer/1808620132) |

## What reviewers say

### 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 |


### TOTP Authenticator

[App page](https://appshunter.io/ios/app/totp-authenticator-2fa/id6804706587)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $1.49 | per month |
| Annual Premium | $11.99 | per year |
| Lifetime Premium | $24.99 | one-time |


## Frequently asked questions

### Is Open Authenticator by Skyost free?

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

### Is TOTP Authenticator free?

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

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

Neither Open Authenticator by Skyost nor TOTP Authenticator shows ads.

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

Open Authenticator by Skyost ships an update fortnightly, and TOTP Authenticator every 8 days. Most recently, Open Authenticator by Skyost was updated on October 14, 2026 and TOTP Authenticator on October 14, 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.*