Comparison

FreeOTP Authenticator vs Open Authenticator by Skyost

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

FreeOTP Authenticator

Generate one-time passwords for enhanced online account security. This app creates temporary codes that, when used with your regular password, significantly strengthen your login protection. It functions even without an internet connection.

Highlights
  • Generates one-time passwords
  • Works offline (airplane mode)
  • Supports Google, Facebook, GitHub, etc.
  • Compatible with TOTP/HOTP protocols
  • Open source software
Read full description

FreeOTP adds a second layer of security for your online accounts. This works by generating one-time passwords on your mobile devices which can be used in conjunction with your normal password to make your login nearly impossible to hack. These passwords can be generated even when your phone is in airplane mode. FreeOTP works with many of the great online services you already use, including Google, Facebook, Evernote, GitHub and many more! FreeOTP also may work for your private corporate security if they implement the standardized TOTP or HOTP protocols. This includes great enterprise solutions like FreeIPA. FreeOTP is open source and free software! Licensed under the Apache 2.0 license, you can obtain the source code for FreeOTP at https://fedorahosted.org/freeotp for review or modification. Contributions are welcome!

About

Open Authenticator by Skyost

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
Read full description

PROTECT YOUR ONLINE ACCOUNTS WITH OPEN AUTHENTICATOR Open Authenticator generates Time-Based One-Time Passwords (TOTPs), which serve as the second factor in the 2FA process. These temporary codes are valid for a short period of time and are used alongside your password to verify your identity when logging into your accounts. This significantly enhances the security of your online accounts and protects them from unauthorized access. KEY FEATURES - Open-Source & Free to use : Our commitment to transparency and security means our app is open-source and will always remain free for local use. If it doesn't cost anything for us, then it shouldn't cost anything for you ! - Cross-Platform Compatibility : Seamlessly sync your TOTP tokens across all your devices, whether you're using iOS, macOS or another platform. - Self-Hostable Backend : You can host the backend on your own server. Your data, your choice. - A lovely crafted app : Open Authenticator has been designed to be fast and easy to use. Quickly find all your TOTPs and copy them directly from the main page ! IN SUMMARY, WHY OPEN AUTHENTICATOR ? Here are the reasons why you should download Open Authenticator : - Enhanced Security : Protect your online accounts from unauthorized access with strong 2FA. - User-Friendly Interface : Intuitive design makes it easy to add, manage, and organize your TOTP tokens. - Continuous Improvement : We're dedicated to delivering the best user experience and regularly update our app with new features and improvements. LINKS - Check it out on Github : https://github.com/openauthenticator-app/openauthenticator - Visit our website : https://openauthenticator.app LEGAL - Privacy policy : https://openauthenticator.app/privacy-policy - Terms of service : https://openauthenticator.app/terms-of-service

Screenshots

FreeOTP Authenticator2 screens
Open Authenticator by Skyost3 screens

Verdict

The call

The clearest difference is rating: Open Authenticator by Skyost at 4.4 against FreeOTP Authenticator's 3.2. Open Authenticator by Skyost also leads on update cadence (fortnightly vs every 6 months). FreeOTP Authenticator's advantage is review sentiment (37% vs 0%) and in-app purchases (none vs 2). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Open Authenticator by Skyost sells 2 in-app purchases, starting at $0.99 per month. FreeOTP Authenticator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Open Authenticator by Skyost holds the better App Store score, 4.4 against 3.2. That said, the two scores are not equally well evidenced: FreeOTP Authenticator has 173 ratings behind it against 9, so its average is the more settled of the two. Written reviews complicate that: 37% of FreeOTP Authenticator's written reviews are positive against 0% of Open Authenticator by Skyost's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

FreeOTP Authenticator ships an update every 6 months, Open Authenticator by Skyost fortnightly. The most recent releases landed on September 23, 2026 and September 10, 2026 respectively.

Scorecard7 real differences · 3 level
FreeOTP Authenticator versus Open Authenticator by Skyost: the parameters behind the verdict, then further details
ParameterFreeOTP AuthenticatorOpen Authenticator by Skyost
PriceFreeFree
Rating3.2 (173 ratings)4.4 (9 ratings) — better
Positive reviews37.0% of reviews — better0.0% of reviews
Number of ratings173 — better9
Update frequencyEvery 6 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS11.0 — better15.0
Further details — not scored
Size11 MB56 MB
Age rating4+4+
DeveloperRed HatHugo Delaunay

Customer experience

FreeOTP Authenticator

All ratings173 ratings
Positive49.1%
Neutral9.8%
Negative41.0%
Written reviews189 reviews
Positive37.0%
Neutral10.6%
Negative52.4%

Open Authenticator by Skyost

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

FreeOTP Authenticator

Reported bugs

3 issues
  • Camera not working for QR code scanning
  • App crashing on launch or when unlocking accounts
  • UI issues on larger iOS devices

Requested features

4 requests
  • Add ability to manually enter account details
  • Implement iCloud/cloud backup sync
  • Allow renaming and deleting of accounts
  • Provide Apple Watch support

Open Authenticator by Skyost

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

FreeOTP Authenticator

No in-app purchases

2 purchases

Open Authenticator by Skyost

Subscriptions2
  • Contributor Plan: Monthly$0.991 Month
  • Contributor Plan: Annual$9.991 Year

Questions

Is FreeOTP Authenticator free?
FreeOTP Authenticator is free to download, 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, FreeOTP Authenticator or Open Authenticator by Skyost?
Open Authenticator by Skyost is rated higher. FreeOTP Authenticator averages 3.2 out of 5 from 173 ratings, while Open Authenticator by Skyost averages 4.4 from 9 ratings.
Do FreeOTP Authenticator or Open Authenticator by Skyost have ads?
Neither FreeOTP Authenticator nor Open Authenticator by Skyost shows ads.
Which is updated more often, FreeOTP Authenticator or Open Authenticator by Skyost?
FreeOTP Authenticator ships an update every 6 months, and Open Authenticator by Skyost fortnightly. Most recently, FreeOTP Authenticator was updated on September 23, 2026 and Open Authenticator by Skyost on September 10, 2026.

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