Comparison

OTP Auth vs Authenticator for Amazon

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

Head to head
About

OTP Auth

Enhance your account security with two-factor authentication on your iPhone and iPad. This app supports numerous popular services and offers robust encryption for all your data. It works offline and prioritizes user privacy by not collecting or transmitting personal information.

Highlights
  • Two-factor authentication support
  • Encrypted iCloud Sync
  • Siri and Apple Watch support
  • Notification Center widget
  • Safari extension for password pasting
  • Face ID/Touch ID security
  • Encrypted backups and import/export
Read full description

OTP Auth adds support for two-factor authentication to your iPhone and iPad. It can be used with Dropbox, Facebook, GitHub, Google Mail and many more. Make your accounts safe again! Features: - Ads free - Encrypted iCloud Sync - Siri Support - Apple Watch support - Notification Center widget - Safari extension for pasting passwords into websites - Secure application using Face ID/Touch ID (or password) - Create encrypted backups of all accounts - Import/Export encrypted accounts using AirDrop, iCloud, Dropbox, Mail, ... - Works offline All data stored by OTP Auth is stored using strong AES-256 encryption. This applies for all data. In particular, for both locally stored data as well as data stored in the iCloud Drive (when iCloud Sync is enabled). The password for those files never leaves your device such that noone but you can read your data. OTP Auth does not collect information about you or send them anywhere. You won't be asked to allow access to your contacts or your location. And most important: OTP Auth does not connect to the internet and will not send your accounts to someone else! (Unless you enable iCloud sync where an AES-256 encrypted copy of your accounts is stored in your iCloud Drive. The password for that copy will never leave your phone.) Follow me on Twitter: @otpauth

About

Authenticator for Amazon

Secure your online accounts with reliable two-factor authentication. This app generates time-based verification codes for safer sign-ins and stronger account protection across various platforms. Setup is quick via QR code scanning or manual entry, with encrypted local storage for privacy.

Highlights
  • Two-factor authentication (2FA)
  • Time-based verification codes
  • QR code scanner
  • Encrypted local storage
  • Backup and recovery
  • User-friendly interface
Read full description

Protect your online accounts and personal data with our secure and easy-to-use authentication app designed to provide reliable two-factor authentication (2FA) for safer sign-ins and stronger account protection. The app generates secure time-based verification codes that help prevent unauthorized access and add an extra layer of security to your accounts, gaming profiles, shopping services, and other online platforms. Getting started is quick and simple. Connect your account, scan a QR code or manually enter setup details, and instantly begin generating authentication codes that refresh automatically every few seconds. With encrypted local storage and advanced privacy protection, your sensitive information stays secure and fully under your control. Key Features: - Secure two-factor authentication (2FA) - Fast generation of time-based verification codes - QR code scanner for easy setup - Encrypted local storage for enhanced privacy - Backup and recovery support - Simple, clean, and user-friendly interface Whether you’re protecting personal accounts, gaming services, or online platforms, our app helps keep your information secure at all times. Subscriptions & In-App Purchases: Weekly — $4.99 Monthly — $12.99 Yearly — $39.99 Lifetime — $59.99 Subscriptions renew automatically unless canceled at least 24 hours before the end of the current billing period. You can manage or cancel your subscription anytime in your device settings. Privacy Policy: https://docs.google.com/document/d/1esenraLZwPR5Ez5k37ohmGm5EUy75q2eMwEkuJ1Aevw/edit Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

OTP Auth4 screens
Authenticator for Amazon4 screens

Verdict

The call

The clearest difference is rating: OTP Auth at 4.6 against Authenticator for Amazon's 1.0. OTP Auth also leads on ratings volume (463 vs 1) and iOS requirement (12.0 vs 15.5). On price, update cadence, ads and in-app purchases 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. OTP Auth sells 1 one-off in-app purchase and Authenticator for Amazon sells 5 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

OTP Auth holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: OTP Auth has 463 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on July 22, 2026 and September 15, 2026 respectively.

Scorecard3 real differences · 7 level
OTP Auth versus Authenticator for Amazon: the parameters behind the verdict, then further details
ParameterOTP AuthAuthenticator for Amazon
PriceFreeFree
Rating4.6 (463 ratings) — better1.0 (1 ratings)
Positive reviews77.9% of reviews—
Number of ratings463 — better1
Update frequencyEvery 2 weeksEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS12.0 — better15.5
Further details — not scored
Size22 MB59 MB
Age rating4+4+
DeveloperRoland MoersGrand Energy LLC

Bugs and requests

OTP Auth

Reported bugs

3 issues
  • Sync issues causing data loss
  • Widget not displaying codes correctly
  • Crashes on certain iOS versions

Requested features

4 requests
  • Larger text/font size options
  • Alphabetical sorting of accounts
  • Automatic account refresh/update
  • Ability to edit account details

Authenticator for Amazon

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

OTP Auth

One-time1
  • OTP Auth Pro$3.99
5 purchases

Authenticator for Amazon

Subscriptions4
  • Weekly$4.997 Days
  • Weekly-Trial3 Days trial$4.997 Days
  • Monthly$12.991 Month
Show 1 more
  • Yearly$39.991 Year
One-time1
  • Lifetime$59.99

Questions

Is OTP Auth free?
OTP Auth is free to download, with in-app purchases available.
Is Authenticator for Amazon free?
Authenticator for Amazon is free to download, with in-app purchases available.
Which has better reviews, OTP Auth or Authenticator for Amazon?
OTP Auth is rated higher. OTP Auth averages 4.6 out of 5 from 463 ratings, while Authenticator for Amazon averages 1.0 from 1 ratings.
Do OTP Auth or Authenticator for Amazon have ads?
Neither OTP Auth nor Authenticator for Amazon shows ads.
Which is updated more often, OTP Auth or Authenticator for Amazon?
OTP Auth ships an update every 2 weeks, and Authenticator for Amazon every 2 weeks. Most recently, OTP Auth was updated on July 22, 2026 and Authenticator for Amazon on September 15, 2026.

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