Comparison

Thetis Authenticator vs dun.

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

Head to head
About

Thetis Authenticator

Manage your FIDO2 security keys for passwordless login and two-factor authentication. Supports NFC and Type-C connections for seamless integration across devices. Offers one-time password management for services not yet supporting FIDO2.

Highlights
  • FIDO2 passwordless login
  • Enhanced two-factor authentication
  • One-time password management
  • Optimized for iPad
  • NFC and Type-C compatibility
  • Cross-platform support
  • Phishing-resistant authentication
Read full description

The Thetis Authenticator App provides seamless management of your FIDO2 security keys, enabling passwordless login, two-factor authentication (2FA), and one-time password (OTP) management. Fully optimized for iPhone and iPad, the app supports NFC and Type-C connections, ensuring compatibility across all your devices. With full support for the FIDO2 security standards, Thetis Authenticator empowers you with fast and phishing-resistant authentication. Whether managing business or personal accounts, you can easily integrate Thetis FIDO2 into your daily workflow. Key Features: ●. FIDO2 Passwordless Login: Replace passwords with strong, FIDO2-based authentication for secure access across platforms. ●. Enhanced 2FA: Strengthen your account security with FIDO2-based two-factor authentication for supported services. ●. Complete OTP Management: Add and manage one-time passwords (OTP) for services that don’t support FIDO2. ●. Optimized for iPad: Manage your keys with ease on a larger screen, with full iPad optimization. ●. NFC and Type-C Compatibility: Effortlessly connect using NFC or Type-C for fast key setup. ●. Cross-Platform Support: Use Thetis FIDO2 for services like Google, Dropbox, Microsoft, AWS, and more. ●. Phishing-Resistant Authentication: Built on the FIDO2 standard, ensuring your accounts are protected. Simplify your security and manage your digital identity with ease using Thetis FIDO2.

About

dun.

This app simplifies homework management by allowing users to input assignments via voice. It uses AI to organize tasks, estimate completion times, and present them one at a time. A built-in study timer and optional school integration further streamline academic organization.

Highlights
  • Voice input for assignments
  • AI-powered task organization
  • Single-task display
  • Built-in study timer
  • School assignment import (Blackbaud)
Features
Read full description

Built by Avi Varshney (12-year-old, 6th grade) dun turns "say your homework" into a task on your calendar — no typing, no menus. HOW IT WORKS Tap the mic and say your assignments out loud: "math worksheet, spanish vocab quiz, history essay due friday." dun's AI figures out the subject, estimated time, and due date for each one, then adds them to your agenda automatically. YOUR DAY, AT A GLANCE Home is a day-by-day agenda: today's tasks up top, upcoming days below, and anything overdue pinned where you can't miss it. Filter by subject, hide finished work, and see everything in one clean scroll — not a wall of every assignment you've ever added. BUILT-IN STUDY TIMER Tap start on any task and dun times your work in real time, even if you switch apps or lock your phone. When you're done, mark it dun and see how your estimate compared. WORKS WITH BLACKBAUD If your school uses Blackbaud, the free dun Chrome extension pulls your assignments straight into the app — no re-typing homework you already see online. https://chromewebstore.google.com/detail/dun/hmlffclpegjacbbpfkooocgeaadgibmn PRIVACY Voice is transcribed to text to detect assignments, then handled per our privacy policy at https://thedunapp.com/privacy. dun never shows ads and never sells your data. Questions or bugs? Email thedunapp@gmail.com — a 12-year-old actually reads it. Built by Avi Varshney (12-year-old, 6th grade)

Screenshots

Thetis Authenticator4 screens
dun.4 screens

Verdict

The call

The clearest difference is rating: dun. at 5.0 against Thetis Authenticator's 3.5. dun. also leads on update cadence (every 6 weeks vs every 9 months). Thetis Authenticator's advantage is ratings volume (4 vs 1) and iOS requirement (13.0 vs 15.1). 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

dun. holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

UpkeepUpdate frequency

Thetis Authenticator ships an update every 9 months, dun. every 6 weeks. The most recent releases landed on October 10, 2026 and October 12, 2026 respectively.

Scorecard4 real differences · 6 level
Thetis Authenticator versus dun.: the parameters behind the verdict, then further details
ParameterThetis Authenticatordun.
PriceFreeFree
Rating3.5 (4 ratings)5.0 (1 ratings) — better
Positive reviews60.0% of reviews—
Number of ratings4 — better1
Update frequencyEvery 9 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size3 MB25 MB
Age rating4+12+
DeveloperRazzo Tech CorporationShobhit Varshney

Customer experience

Thetis Authenticator

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews5 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

dun.

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Thetis Authenticator

No in-app purchases

None

dun.

No in-app purchases

Questions

Is Thetis Authenticator free?
Thetis Authenticator is free to download, with no in-app purchases.
Is dun. free?
dun. is free to download, with no in-app purchases.
Which has better reviews, Thetis Authenticator or dun.?
dun. is rated higher. Thetis Authenticator averages 3.5 out of 5 from 4 ratings, while dun. averages 5.0 from 1 ratings.
Do Thetis Authenticator or dun. have ads?
Neither Thetis Authenticator nor dun. shows ads.
Which is updated more often, Thetis Authenticator or dun.?
Thetis Authenticator ships an update every 9 months, and dun. every 6 weeks. Most recently, Thetis Authenticator was updated on October 10, 2026 and dun. on October 12, 2026.

Other comparisons