Comparison

Two factor authenticator vs Auth Sync

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

Head to head
About

Two factor authenticator

Features
Read full description

We adds an extra layer of security to your online accounts by adding a second step of verification when you sign in. This means that in addition to your password, you'll also need to enter a code that is generated by our app on your phone. The verification code can be generated by our app on your phone, even if you don't have a network or cellular connection. β€’ Sync your Authenticator codes to your accounts and across your devices. This way, you can always access them even if you lose your phone. β€’ Set up your Authenticator accounts automatically with a QR code. This is quick and easy, and it helps to ensure that your codes are set up correctly. β€’ Support for multiple accounts. You can use the Authenticator app to manage multiple accounts, so you don't have to switch between apps every time you need to sign in. β€’ Support for time-based and counter-based code generation. You can choose the type of code generation that best suits your needs. β€’ Transfer accounts between devices with a QR code. This is a convenient way to move your accounts to a new device. To use app with accounts, you need to enable 2-Step Verification on your accounts. Terms of use: https://devworldvn.com/term Privacy link: https://devworldvn.com/privacy

About

Auth Sync

Features
Read full description

Auth Sync is a 2FA (TOTP) authenticator focused on privacy and simplicity. Generate and use OTP offline, then enable end-to-end encrypted cloud sync only when you need it. Your TOTP vault is encrypted on deviceβ€”the server has zero knowledge. Highlights TOTP add & scan: QR scan, manual input, 6/8 digits, SHA1/256/512, 30s/60s. Folders & search, tagging, quick copy. E2EE cloud sync on demand; encryption keys never leave your devices. Secure sharing across your own devices (E2EE). Export/Import with encrypted backups; import from common authenticators. Extras: password generator, temporary email, Base64 encode/decode. Local encrypted backups to Files/iCloud. Security True E2EE with zero-knowledge backend. No collection of TOTP contents. Integrity checks to protect your vault. How it works Add accounts (scan QR or enter secret). Use offline codes immediately. Sign in to enable E2EE Sync across devices. Export/Import for long-term backups.

Screenshots

Two factor authenticator4 screens
Auth Sync3 screens

Verdict

The call

The clearest difference is in-app purchases: Auth Sync at none against Two factor authenticator's 3. Auth Sync also leads on ads (none vs shown). Two factor authenticator's advantage is update cadence (monthly vs every 3 months). On price, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Two factor authenticator sells 3 in-app purchases, starting at $1.99 per 7 days. Auth Sync asks for nothing beyond the download.

UpkeepUpdate frequency

Two factor authenticator ships an update monthly, Auth Sync every 3 months. The most recent releases landed on September 23, 2026 and August 22, 2026 respectively.

Scorecard3 real differences Β· 3 level
Two factor authenticator versus Auth Sync: the parameters behind the verdict, then further details
ParameterTwo factor authenticatorAuth Sync
PriceFreeFree
Update frequencyMonthly β€” betterEvery 3 months
AdsYesNo β€” better
In-app purchasesYesNo β€” better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 β€” better15.1
Further details β€” not scored
Size45 MB59 MB
Age rating4+4+
Developernguyen thanhDREAMER NETWORK CO., LTD

In-app purchases

3 purchases

Two factor authenticator

Subscriptions3
  • 1 Week Premium$1.997 Days
  • One Month Premium$4.991 Month
  • 1 Year Premium3 Days trial$19.991 Year
None

Auth Sync

No in-app purchases

Questions

Is Two factor authenticator free?
Two factor authenticator is free to download, with in-app purchases available.
Is Auth Sync free?
Auth Sync is free to download, with no in-app purchases.
Do Two factor authenticator or Auth Sync have ads?
Two factor authenticator shows ads; Auth Sync does not.
Which is updated more often, Two factor authenticator or Auth Sync?
Two factor authenticator ships an update monthly, and Auth Sync every 3 months. Most recently, Two factor authenticator was updated on September 23, 2026 and Auth Sync on August 22, 2026.

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