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Is Authenticator App Duo Secure Safe?

Authenticator App Duo Secure privacy label · by APPERTURE SP Z O O · checked November 2026

  • Tracks you
  • Collects location
  • Not updated in 2+ years
App Privacy label Developer-reported · checked November 1, 2026
Used to track you
1type
Linked to you
0types

None declared

Not linked to you
5types
Short answer

It depends on how you feel about tracking: Authenticator App Duo Secure declares data used to track you. The sensitive items are location. In total the label lists 5 data types; 36% of authenticator apps we checked declare tracking.

At a glance

Authenticator App Duo Secure privacy in one look

Data exposure on the label
Used to track you
  1. 1
  2. 2
  3. 3
  4. 4

Built only from the developer's App Store label. It describes disclosure, not tested behaviour.

Verdict from the label
Tracks you

Authenticator App Duo Secure's developer reports using location to track you across other companies' apps and websites.

Try it

Did Authenticator App Duo Secure ask for something?

Pick the permission prompt you saw. We compare it with what Authenticator App Duo Secure's developer declared.

It asked me for access to…
Tap a prompt to compare it with the label.
Matches the label

Authenticator App Duo Secure lists Location on its label, including for tracking. Choose While Using and turn off Precise Location if the feature works without it.

Not on the label

User Content is not on Authenticator App Duo Secure's label. That can be fine: data used only on your iPhone does not have to be declared. If the data would need to leave the phone for the feature to work, ask why it is missing.

Not on the label

Contacts is not on Authenticator App Duo Secure's label. That can be fine: data used only on your iPhone does not have to be declared. If the data would need to leave the phone for the feature to work, ask why it is missing.

Expected — and you can decline

Authenticator App Duo Secure declares data used to track you, so expect the “Allow to track?” prompt. Tap Ask App Not to Track; the app must keep working without it.

Not on the label

Health & Fitness is not on Authenticator App Duo Secure's label. That can be fine: data used only on your iPhone does not have to be declared. If the data would need to leave the phone for the feature to work, ask why it is missing.

A permission is what the app can reach on your iPhone; the label is what the developer says leaves it. They answer different questions.

Line by line

What Authenticator App Duo Secure collects, explained

Data typeWhat it coversWhere to limit it
LocationSensitiveUsed to track youNot linked to you Where your phone is, either precisely (street level) or approximately (city or area). Settings › Privacy & Security › Location Services: choose Never or While Using, and turn off Precise Location if the app does not need it.
Contact InfoNot linked to you Your name, email address, phone number or postal address. Use Sign in with Apple with Hide My Email where offered, and check the app's account and marketing preferences.
PurchasesNot linked to you What you have bought or tend to buy. Review in-app marketing settings; subscriptions are listed in Settings › [your name] › Subscriptions.
IdentifiersNot linked to you An account ID, screen name, customer number or a device-level ID such as the advertising identifier. Settings › Privacy & Security › Tracking: turn off Allow Apps to Request to Track, or tap Ask App Not to Track when prompted.
DiagnosticsNot linked to you Crash logs, launch times, hang rates and energy use. Settings › Privacy & Security › Analytics & Improvements › Share With App Developers controls what Apple passes on; the app's own crash reporting is separate.
Reading the label

What Authenticator App Duo Secure's label means for you

Authenticator App Duo Secure's label has 1 type under “Data Used to Track You”, 5 types under “Data Not Linked to You”. A data type can appear in more than one section when it is used for different purposes — for example, identifiers used for both analytics and advertising.

Tracking is the declaration that most separates apps. It means location from Authenticator App Duo Secure can be combined with data from other companies to target or measure ads, or shared with data brokers. On iOS 14.5 and later, the app must ask your permission before tracking you through the advertising identifier; answering “Ask App Not to Track” blocks that identifier and tells the developer you have declined.

The items that deserve the most attention are location. Location history reveals home, work and routines. Precise location deserves the most scrutiny.

Authenticator apps generate the second factor for your logins. The biggest practical risk is not data collection but losing your codes when you lose your phone. Turn on encrypted backup or export your accounts, and save the recovery codes each service gave you.

Among the 173 authenticator apps in our snapshot with a label, 36% declare tracking, 45% collect data linked to you and 40% say they collect nothing. Authenticator App Duo Secure lists 5 data types, more than the average of 1.8 for this group.

Business apps often handle other people's data — clients, colleagues and customers — so what they collect can affect more than you.

On your iPhone

Settings to check for Authenticator App Duo Secure

  1. 1

    Tracking

    Settings › Privacy & Security › Tracking. If “Allow Apps to Request to Track” is off, apps cannot ask, and they are told to treat you as having declined. You can also turn it off for this app alone.

  2. 2

    Location

    Settings › Privacy & Security › Location Services › Authenticator App Duo Secure. Choose While Using or Never, and switch off Precise Location if a city-level answer is enough.

  3. 3

    Sign-in

    When creating an account, Sign in with Apple can give the app a relay address from Hide My Email instead of your real one.

  4. 4

    Lock the app

    On iOS 18 and later, touch and hold the icon and choose Require Face ID. Anyone who picks up your unlocked phone then needs your face, fingerprint or passcode to open it.

  5. 5

    Notifications

    Settings › Notifications › Authenticator App Duo Secure › Show Previews: When Unlocked keeps message and account details off the Lock Screen.

Cross-app tracking

Does Authenticator App Duo Secure track you?

Yes — 1 data type

Location. Apple defines tracking as linking data from this app with data from other companies' apps, websites or offline sources for targeted advertising or ad measurement, or sharing it with a data broker.

Does Authenticator App Duo Secure track you? Full answer and how to stop it →

iOS 18 and later

Lock Authenticator App Duo Secure behind Face ID

  1. Find Authenticator App Duo Secure on your Home Screen or in App Library.
  2. Touch and hold the icon until the quick-actions menu opens.
  3. Tap Require Face ID (or Require Touch ID / Require Passcode, depending on your iPhone).
  4. Tap Require Face ID again to confirm. Authenticator App Duo Secure now asks for authentication every time it opens.

The lock is an iPhone feature, so it works whether or not Authenticator App Duo Secure has a passcode of its own. It does not change what the app sends to its developer.

Lock or hide Authenticator App Duo Secure: step-by-step guide →

From the App Store record

About Authenticator App Duo Secure

DeveloperAPPERTURE SP Z O O
App Store categoryBusiness (also Productivity)
Latest version1.0.6, released April 2024
First releasedNovember 2023
RequiresiOS 15.0 or later
Size101 MB
Age rating4+
Languages1 (EN)
Bundle IDfog.authupexelent

The current version shipped in April 2024, 2 years before our snapshot. Apps that are not updated may not support newer iOS privacy controls, and an abandoned app will not get security fixes.

Read with care

What the label cannot tell you

  • A label is self-reported. Apple publishes the developer's answers and can reject apps that misrepresent them, but it does not independently verify what Authenticator App Duo Secure sends.
  • It does not say where data is stored, how long it is kept, whether it is encrypted, or which companies receive it. The privacy policy covers those points.
  • Optional data counts: if a feature lets you add something (a profile photo, a phone number), the type is listed even if you never use the feature.
  • Data handled only on your iPhone is not 'collected', so a no-collection label is compatible with an app that reads your files locally.
  • Third-party sign-in, payment processors and SDKs are supposed to be included, but a label can lag behind a new version.

The question to ask Authenticator App Duo Secure's developer: If this iPhone is lost, how do I restore my codes?

How it compares

Authenticator App Duo Secure vs similar authenticator apps

Data types listed on each App Store privacy label
Tracks youLinked to youNot linkedCollects nothing

Fewer types is not automatically safer: a cloud backup app has to collect your files to work. Compare like with like.

Checking another app?

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All authenticator apps → Who tracks you? A–Z → Apps that collect location → Privacy label decoder →

Do it now

Your Authenticator App Duo Secure privacy checklist

Tick what you have done
Tick each step as you do it on your iPhone.

Done. You have applied every control the label points to.

Quick quiz

True or false?

  1. Q1Authenticator App Duo Secure's privacy label says it uses data to track you.
    Right.
    Not quite.

    True: it lists location under Data Used to Track You.

  2. Q2Apple tests every app to confirm its privacy label is accurate.
    Right.
    Not quite.

    Labels are self-reported by developers. Apple can reject or remove apps that misrepresent practices, but it does not audit each label.

  3. Q3Authenticator App Duo Secure collects Location.
    Right.
    Not quite.

    True: Location appears on its label.

  4. Q4Data “Not Linked to You” is never sent off your iPhone.
    Right.
    Not quite.

    It is collected and sent; the developer says it is de-identified rather than tied to your account or device.

  5. Q5Tapping “Ask App Not to Track” can stop an app from working.
    Right.
    Not quite.

    Apple's rules require apps to work the same whether or not you allow tracking.

Questions people ask

Authenticator App Duo Secure privacy FAQ

Is Authenticator App Duo Secure safe to use?
Based on its App Store privacy label, authenticator App Duo Secure's developer reports using location to track you across other companies' apps and websites. Whether that is acceptable depends on what you will store in it. The label is developer-reported, not an independent security test.
Does Authenticator App Duo Secure track you?
Yes. Its label lists location under Data Used to Track You. You can decline at the iOS tracking prompt.
What data does Authenticator App Duo Secure collect?
Location, contact info, purchases, identifiers and diagnostics. Of these, location is linked to your identity.
Who makes Authenticator App Duo Secure?
APPERTURE SP Z O O, according to the App Store. It was first released in November 2023 and the current version is 1.0.6.
Can I lock Authenticator App Duo Secure with Face ID?
On iOS 18 or later, touch and hold Authenticator App Duo Secure's icon and choose Require Face ID (or Touch ID / Passcode). This is an iPhone feature and works for most downloaded apps, whether or not the app has its own lock.
How does Authenticator App Duo Secure compare with other authenticator apps?
Across 173 authenticator apps with labels in our snapshot, 36% declare tracking and 40% say they collect no data. Authenticator App Duo Secure lists 5 data types against an average of 1.8.
If this iPhone is lost, how do I restore my codes?
The privacy label cannot answer that. Look for it in Authenticator App Duo Secure's privacy policy or support pages, linked from the App Store listing. Turn on encrypted backup or export your accounts, and save the recovery codes each service gave you.
How do I delete my data from Authenticator App Duo Secure?
Apps that let you create an account must also let you start account deletion from inside the app (an App Store rule since June 2022). Deleting the app from your iPhone alone does not delete data already sent to the developer.
Facts on this page come from Authenticator App Duo Secure on the App Store, as reported by the developer. Checked 2026-11-01. How we collect data · Report a correction