Comparison

Keylet vs 2FA iAtomos

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

Head to head
About

Keylet

Features
Read full description

Keylet is the privacy-first authenticator that fills your 2FA codes right above the keyboard — without opening the app, and without ever showing a code on screen. From the makers of Authenticator+ — and switching is effortless. Import your accounts in seconds, straight from Authenticator+, Google Authenticator, Authy, Microsoft, 1Password and more — or even from a single screenshot, with no second device needed. Your secrets never leave your phone. Everything lives in an encrypted, zero-knowledge vault (AES-256-GCM) that only you can open. No account. No cloud. No tracking. No ads. WHY KEYLET • AutoFill, done right — tap a verification-code field and Keylet offers the right code. It fills it; it never displays it. Nothing to shoulder-surf. • Import in seconds — from Authenticator+, Google Authenticator, Authy, Microsoft, 1Password, a backup file, or a screenshot. No second device required. • Multiple vaults — keep work and personal completely separate, each encrypted on its own. • Encrypted sharing — hand a code to someone you trust over end-to-end encryption, with a self-destructing expiry. • Backed up, safely — automatic daily encrypted backups on your device, plus password-protected export. No cloud needed. • Yours to organise — biometric lock per account, categories, recovery keys and home-screen widgets. • No ads. Ever. Unlimited accounts, free. Keylet keeps your second factor exactly where it belongs: in your hands, encrypted, and out of sight. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://studiofifteen.nl/app/keylet/privacy

About

2FA iAtomos

Features
Read full description

FREE FOREVER 2FA iAtomos is free forever. There is no subscription, no advertising and nothing to buy inside the app. Codes follow the open TOTP standard, and the optional cloud copy is encrypted on the phone before upload. You can import accounts from Google Authenticator, Authy, 2FAS and Aegis. About five seconds before a code changes, the app can warn you. 2FA iAtomos generates your two-factor codes on the phone itself. No account, no connection, no tracking. Your 2FA secrets live in a vault encrypted on the device with AES-256-GCM. The key is held by the iOS Keychain. Nothing leaves the phone unless you decide it should. CLOUD BACKUP, NO PASSWORD TO REMEMBER Sign in and your accounts are saved automatically. Every change is encrypted on your device with AES-256-GCM before upload, with a key that lives only in your iCloud Keychain. On your next iPhone or iPad with the same Apple ID, your accounts appear on their own. A green cloud on the home screen tells you everything is saved. The server only ever receives encrypted data. Restoring merges accounts and never deletes what you already have, and an altered copy or a version conflict leaves your local vault untouched. You can switch the backup off at any time and it is deleted from the server. AN INDEPENDENT ENCRYPTED FILE Export a password-protected file whenever you like. It does not depend on the cloud backup or on any account, so you always have a second way back. WHAT IT DOES • Standard 2FA codes (TOTP, RFC 6238) with SHA-1, SHA-256 and SHA-512, 6 or 8 digits • Scan a QR code, import a Google Authenticator export, or type the secret • Face ID or Touch ID lock, with the device passcode as fallback • Favorites, search and a custom order • The service's own period is respected, never stretched to buy time • English, Spanish, Catalan, German, French, Italian, Portuguese, Japanese, Korean, Chinese (Simplified) and Russian BUILT FOR EVERYONE The app follows your iOS accessibility settings rather than fighting them. Larger Text grows the code instead of shrinking it, Increase Contrast switches to a high-contrast palette, Reduce Motion stops the countdown animating, and Bold Text and Smart Invert are honored. With VoiceOver, every code can be read out digit by digit and copied, starred or deleted through rotor actions. Time remaining is available on demand, so nothing interrupts you mid-code. Urgency is never signaled by color alone. WHAT IT DOES NOT DO • No ads • No data selling • No behavioral tracking • No secrets, account names or generated codes in any log or report The optional account lets you sign in with Apple, Google or your email. Those services process account identifiers and diagnostic data, and the privacy policy says exactly which and when. The security model is written down, not implied. Read the privacy policy and its security limits at 2fa.iatomos.com.

Screenshots

Keylet4 screens
2FA iAtomos4 screens

Verdict

The call

The clearest difference is in-app purchases: 2FA iAtomos at none against Keylet's 3. 2FA iAtomos also leads on device support (4 vs 2). On price, update cadence, ads and iOS requirement there is nothing between them.

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

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

Both are free to download. Keylet sells 3 in-app purchases, starting at $2.99 per month. 2FA iAtomos asks for nothing beyond the download.

UpkeepUpdate frequency

Keylet ships an update every 5 days, 2FA iAtomos every 8 days. The most recent releases landed on October 4, 2026 and October 11, 2026 respectively.

Scorecard2 real differences Ā· 4 level
Keylet versus 2FA iAtomos: the parameters behind the verdict, then further details
ParameterKeylet2FA iAtomos
PriceFreeFree
Update frequencyEvery 5 days — betterEvery 8 days
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, Apple WatchiPhone, iPad, iPod, Apple Watch — better
Requires iOS16.415.5 — better
Further details — not scored
Size108 MB63 MB
Age rating4+4+
DeveloperStudio FifteenSAMUEL MORENO CONEJERO

In-app purchases

3 purchases

Keylet

Subscriptions2
  • Keylet Pro – Monthly$2.991 Month
  • Keylet Pro – Yearly$12.991 Year
One-time1
  • Keylet Pro – Lifetime$44.99
None

2FA iAtomos

No in-app purchases

Questions

Is Keylet free?
Keylet is free to download, with in-app purchases available.
Is 2FA iAtomos free?
2FA iAtomos is free to download, with no in-app purchases.
Do Keylet or 2FA iAtomos have ads?
Neither Keylet nor 2FA iAtomos shows ads.
Which is updated more often, Keylet or 2FA iAtomos?
Keylet ships an update every 5 days, and 2FA iAtomos every 8 days. Most recently, Keylet was updated on October 4, 2026 and 2FA iAtomos on October 11, 2026.

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