# LunaOTP vs Open Authenticator by Skyost

The clearest difference is price: Open Authenticator by Skyost at Free against LunaOTP's $4.99. Open Authenticator by Skyost also leads on update cadence (fortnightly vs every 14 months) and ratings volume (9 vs 2). LunaOTP's advantage is rating (5.0 vs 4.4) and in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

Open Authenticator by Skyost is free to download; LunaOTP costs $4.99 up front. Open Authenticator by Skyost sells 2 in-app purchases, starting at $0.99 per month. LunaOTP asks for nothing beyond the download.

LunaOTP holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 2 and 9 respectively.

LunaOTP ships an update every 14 months, Open Authenticator by Skyost fortnightly. The most recent releases landed on June 4, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | LunaOTP | Open Authenticator by Skyost |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/lunaotp-authenticator/id1617473091/reviews)** | [4.4 (9 ratings)](https://appshunter.io/ios/app/open-authenticator-by-skyost/id6479272927/reviews) |
| Number of ratings | 2 | **9** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Fortnightly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 56 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad, Mac | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Reza Moallemi](https://appshunter.io/developer/1171425650) | [Hugo Delaunay](https://appshunter.io/developer/1456648264) |

## What reviewers say

### LunaOTP

[App page](https://appshunter.io/ios/app/lunaotp-authenticator/id1617473091)

This app provides secure two-factor authentication (2FA) for your online accounts using Apple's Keychain for storage. It offers encrypted iCloud sync, export/import options, and Face ID/Touch ID protection for enhanced security.

**Highlights:** Apple Keychain security, Encrypted iCloud sync, Export/Import OTP codes, Face ID and Touch ID support, Offline functionality, Category management

**In-app purchases:** none


### 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 LunaOTP free?

LunaOTP costs $4.99, with no in-app purchases.

### Is Open Authenticator by Skyost free?

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

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

LunaOTP is rated higher. LunaOTP averages 5.0 out of 5 from 2 ratings, while Open Authenticator by Skyost averages 4.4 from 9 ratings.

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

Neither LunaOTP nor Open Authenticator by Skyost shows ads.

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

LunaOTP ships an update every 14 months, and Open Authenticator by Skyost fortnightly. Most recently, LunaOTP was updated on June 4, 2026 and Open Authenticator by Skyost 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.*