Comparison

TOTP 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

TOTP Authenticator

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
Read full description

TOTP Authenticator generates 6-digit TOTP codes. Websites (or example Arbeitsagentur, NextCloud etc.) request these codes. This security feature is called two factor authentication or 2FA. How to sign in using TOTP? 1. Go to the “Security” section 2. Enable TOTP login 3. Scan the QR code or copy the secret key into your Authenticator 4. Done — 2FA is now enabled. From now on, you’ll need to enter a TOTP code from the Authenticator app whenever you log in The app also includes over 100 step-by-step tutorials with screenshots showing how to set up TOTP for various websites. Privacy Policy: https://totp-authenticator.com/privacy-policy/appstore Terms of Use: https://totp-authenticator.com/terms-of-use/appstore

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

TOTP Authenticator4 screens
Open Authenticator by Skyost3 screens

Verdict

The call

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.

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. 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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 8 level
TOTP Authenticator versus Open Authenticator by Skyost: the parameters behind the verdict, then further details
ParameterTOTP AuthenticatorOpen Authenticator by Skyost
PriceFreeFree
Rating4.7 (182 ratings) — better4.6 (12 ratings)
Positive reviews65.8% of reviews — better0.0% of reviews
Number of ratings182 — better12
Update frequencyEvery 2 weeksFortnightly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac, Apple Watch — betteriPhone, iPad, iPod, Mac
Requires iOS15.015.0
Further details — not scored
Size24 MB56 MB
Age rating4+4+
DeveloperSparrow Code LTDHugo Delaunay

Customer experience

TOTP Authenticator

All ratings180 ratings
Positive93.3%
Neutral0.6%
Negative6.1%
Written reviews76 reviews
Positive65.8%
Neutral1.3%
Negative32.9%

Open Authenticator by Skyost

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

In-app purchases

4 purchases

TOTP Authenticator

Subscriptions3
  • TOTP OTP Codes (1 week)7 Days trial$5.997 Days
  • TOTP OTP Codes (1 month)7 Days trial$9.991 Month
  • TOTP OTP Codes (1 year)7 Days trial$59.991 Year
One-time1
  • Unlimited TOTP OTP Codes$79.99
2 purchases

Open Authenticator by Skyost

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

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.

Other comparisons