Comparison

2FA Authenticator (2FAS) vs MobileKey

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

Head to head
About

2FA Authenticator (2FAS)

Securely log in to your online accounts with two-factor authentication. This app protects your personal data and passwords from cyber threats with a simple, private, and open-source solution. It offers easy token restoration, app protection, and offline functionality.

Highlights
  • Two-factor authentication
  • Token backup and restore
  • App protection with passcode/biometrics
  • Open-source and transparent
  • Offline functionality
  • Cross-device sync
  • One-tap authentication with browser extensions
Features
Read full description

2FAS is the easiest way to enable two-factor authentication (or multi-factor authentication) to verify your identity and securely log in to accounts to keep your personal data and passwords protected from cyber threats — all from one app, 100% free! The world’s most secure, private, and simple 2FA app. Secure: • Easily restore your tokens with backups. • Add app protection with your passcode or biometrics. • 2FAS is open-source, transparent, and community-driven. Simple: • 2FAS syncs across your mobile devices. • An interface designed for simplicity. • One-tap authentication with 2FAS Browser Extensions. • Multi-language support. • Quick guides for setup and support. Private: • 2FAS works offline. • 2FAS doesn't store any passwords or metadata. • 100% anonymous use, no account required. It’s not too late to protect your data, so what are you waiting for? Protect your online accounts and services now with TOTP and HOTP algorithms. Start using the 2FAS authenticator app today! If you have any questions, talk with us on our Discord server: https://discord.gg/q4cP6qh2g5 Learn more about 2FAS: • Check our GitHub repository: https://github.com/twofas • Visit our website at: https://2fas.com/ • Follow us on X: https://x.com/2FAS_com • Subscribe on YouTube: https://www.youtube.com/@2FAS

About

MobileKey

Manage door statuses, grant remote access, and send digital keys to friends. Receive messages from event management and view access lists. Secure actions with Touch ID.

Highlights
  • Door status overview
  • Remote door openings
  • Send digital keys (Key4Friends)
  • View access lists
  • Receive event management messages
  • Touch ID security
Features
Read full description

MobileKey app to manage DM status, access lists, remote openings, Key4Friends and reception of messages from event management. - Overview of door statuses (if DM cylinder used) - Remote openings - Sending of Key4Friends authorisations - Reading and display of access list - Reception of push messages from event management. - Use of touch ID for security-related actions (disable remote opening, Key4Friends, push messages) The locking plan is fully managed on the MobileKey web application only, which you will find at www.my-mobilekey-com. Extra information: - The app requires valid log-in data for a MobileKey locking system. You need to have a MobileKey account to be able to use the account. You can register free of charge at www.my-mobilekey-com. - Your mobile device needs to have a stable Internet connection to operate the app, such as wireless LAN or 3/4G. - Many functions are only available with the online add-on (SmartBridge). Security takes top priority: Your data is stored on an audited SimonsVoss server in Munich. You do not need to worry about data security and backups. We will do it for you and to a high standard. Instructions: - Create a free MobileKey account for your use. - Obtain all MobileKey components, such as keys and locks. - Set up the MobileKey components in the web application. You will find the precise procedure in the MobileKey manual. - Programme the components. - Test the components. - Fit the components. You will find more help in the enclosed manuals.

Screenshots

2FA Authenticator (2FAS)4 screens
MobileKey4 screens

Verdict

The call

The clearest difference is review sentiment: 2FA Authenticator (2FAS) at 77% against MobileKey's 32%. 2FA Authenticator (2FAS) also leads on rating (4.7 vs 1.0) and ratings volume (36K vs 1). MobileKey's advantage is iOS requirement (15.3 vs 18.6). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

2FA Authenticator (2FAS) holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: 2FA Authenticator (2FAS) has 36K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 77% of 2FA Authenticator (2FAS)'s written reviews are positive against 32% of MobileKey's.

UpkeepUpdate frequency

2FA Authenticator (2FAS) ships an update monthly, MobileKey every 3 months. The most recent releases landed on October 22, 2026 and October 17, 2026 respectively.

Scorecard5 real differences · 5 level
2FA Authenticator (2FAS) versus MobileKey: the parameters behind the verdict, then further details
Parameter2FA Authenticator (2FAS)MobileKey
PriceFreeFree
Rating4.7 (36K ratings) — better1.0 (1 ratings)
Positive reviews77.4% of reviews — better32.3% of reviews
Number of ratings36K — better1
Update frequencyMonthly — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.615.3 — better
Further details — not scored
Size80 MB49 MB
Age rating4+4+
DeveloperTwo Factor Authentication Service Inc.SimonsVoss Technologies GmbH

Customer experience

2FA Authenticator (2FAS)

All ratings35,401 ratings
Positive93.2%
Neutral2.1%
Negative4.8%
Written reviews721 reviews
Positive77.4%
Neutral5.4%
Negative17.2%

MobileKey

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews31 reviews
Positive32.3%
Neutral16.1%
Negative51.6%

Bugs and requests

2FA Authenticator (2FAS)

Reported bugs

3 issues
  • Tokens disappearing after device changes
  • Push notification failures
  • Incompatibility with older devices

Requested features

5 requests
  • Alphanumeric passcode option
  • Custom icon uploads
  • Apple Watch app
  • Desktop/web app
  • Improved support and communication

MobileKey

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

2FA Authenticator (2FAS)

No in-app purchases

None

MobileKey

No in-app purchases

Questions

Is 2FA Authenticator (2FAS) free?
2FA Authenticator (2FAS) is free to download, with no in-app purchases.
Is MobileKey free?
MobileKey is free to download, with no in-app purchases.
Which has better reviews, 2FA Authenticator (2FAS) or MobileKey?
2FA Authenticator (2FAS) is rated higher. 2FA Authenticator (2FAS) averages 4.7 out of 5 from 36K ratings, while MobileKey averages 1.0 from 1 ratings.
Do 2FA Authenticator (2FAS) or MobileKey have ads?
Neither 2FA Authenticator (2FAS) nor MobileKey shows ads.
Which is updated more often, 2FA Authenticator (2FAS) or MobileKey?
2FA Authenticator (2FAS) ships an update monthly, and MobileKey every 3 months. Most recently, 2FA Authenticator (2FAS) was updated on October 22, 2026 and MobileKey on October 17, 2026.

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