Duolingo: Language Lessons

Duolingo · Duolingo is a learning app that teaches languages, math, music, and chess through quick, bite sized lessons.

Unity Education Duolingo

Bundle ID com.duolingo

Version analyzed 6.90.3

Build framework Unity

SDKs detected 39

Analyzed 2026-08-29

Exploratory agent run

What Duolingo: Language Lessons does

Observed on screen

Free Language Learning Provides access to language-learning content under the “Learn for free. Forever.” model.
Guided Onboarding Introduces new users to the app through a step-by-step setup flow led by the Duo character.
Account Sign-In Supports authentication using a username or email address and password.
Social Authentication Allows users to sign in through Facebook or Google.
Password Recovery Sends an email-based reset link when a user forgets their password.
Account Access Options Separates registration for new users from sign-in for existing users.

Written from a FlyTrap agent exploring the app on a real device, not from the store listing. It covers only the screens that run reached, so anything behind a login, paywall or region lock is absent.

Static + runtime analysis

SDKs detected

39 SDKs found across 14 categories. Click any SDK to see every other app that uses it.

All SDKs

Analytics 2 SDKs

Firebase Analytics Google

Facebook SDK Meta

Animation 2 SDKs

Lottie Airbnb

Rive Rive

Anti-Abuse 1 SDK

Google Play Integrity Google

Attribution 1 SDK

Adjust Adjust

Audio 1 SDK

FMOD Firelight Technologies

Authentication 2 SDKs

Google Sign-In Google

Google Identity Credentials Google

Crash Reporting 1 SDK

Firebase Crashlytics Google

Framework 1 SDK

Unity Engine Unity

Imaging 1 SDK

Coil Coil

Monitoring 2 SDKs

Sentry Sentry

ByteDance APM Insight ByteDance

Push Notifications 1 SDK

Firebase Cloud Messaging Google

Session Replay 1 SDK

Sentry Session Replay Sentry

Social 1 SDK

Facebook Gaming Services Meta

From manifest + Info.plist

Permissions requested 8 sensitive

43 permissions requested at runtime. Colors reflect platform sensitivity tier.

Read calendar sensitive

Read the user's calendar data.

Modify calendar sensitive

Add, modify, or remove calendar events.

Find accounts on device sensitive

Read the list of accounts known to the device.

Microphone sensitive

Record audio from the microphone.

Post notifications sensitive

Post notifications to the system.

Read storage sensitive

Read files from shared external storage. Replaced by READ_MEDIA_* on Android 13+.

Read contacts sensitive

Read the user's contacts data.

Write storage sensitive

Write files to shared external storage. No-op for apps targeting Android 11+.

Internet access standard

Open network sockets.

Network state standard

Read connectivity information.

Foreground service standard

Run a foreground service.

Vibrate standard

Control the vibrator.

Run at startup standard

Receive the BOOT_COMPLETED broadcast.

DETECT SCREEN CAPTURE standard

com.google.android.c2dm.permission.RECEIVE standard

com.google.android.gms.permission.AD ID standard

In-app billing standard

Use Google Play Billing for in-app purchases and subscriptions.

Modify audio settings standard

Modify global audio settings.

Biometric authentication standard

Authenticate using biometric hardware.

Fingerprint authentication standard

Authenticate using fingerprint hardware.

ACCESS ADSERVICES ATTRIBUTION standard

ACCESS ADSERVICES AD ID standard

AD SERVICES CONFIG standard

Wake lock standard

Keep the device awake.

com.google.android.finsky.permission.BIND GET INSTALL REFERRER SERVICE standard

ACCESS ADSERVICES TOPICS standard

com.duolingo.DYNAMIC RECEIVER NOT EXPORTED PERMISSION standard

com.sec.android.provider.badge.permission.READ standard

com.sec.android.provider.badge.permission.WRITE standard

com.htc.launcher.permission.READ SETTINGS standard

com.htc.launcher.permission.UPDATE SHORTCUT standard

com.sonyericsson.home.permission.BROADCAST BADGE standard

com.sonymobile.home.permission.PROVIDER INSERT BADGE standard

com.anddoes.launcher.permission.UPDATE COUNT standard

com.majeur.launcher.permission.UPDATE BADGE standard

com.huawei.android.launcher.permission.CHANGE BADGE standard

com.huawei.android.launcher.permission.READ SETTINGS standard

com.huawei.android.launcher.permission.WRITE SETTINGS standard

READ APP BADGE standard

com.oppo.launcher.permission.READ SETTINGS standard

com.oppo.launcher.permission.WRITE SETTINGS standard

me.everything.badger.permission.BADGE COUNT READ standard

me.everything.badger.permission.BADGE COUNT WRITE standard

Frequently asked questions

What FlyTrap detected inside Duolingo: Language Lessons.

What does Duolingo: Language Lessons do?

Duolingo is a language-learning application that provides free, guided lessons. The available screens cover new-user onboarding, existing-account authentication, third-party sign-in, and password recovery. This comes from a FlyTrap agent exploring the app on a real device, so it covers only the screens that run reached.

What is Duolingo: Language Lessons built with?

Duolingo: Language Lessons by Duolingo is built with Unity. FlyTrap determined this by analyzing the app's compiled binary, not from anything the developer published.

What SDKs does Duolingo: Language Lessons use?

FlyTrap detected 39 third-party SDKs inside Duolingo: Language Lessons, including Amazon Publisher Services, AppLovin MAX and Coil. They span areas such as Ads, Imaging, Analytics and Push Notifications. The full list, grouped by category, is on this page.

What permissions does Duolingo: Language Lessons request?

Duolingo: Language Lessons requests 43 permissions. 8 of these are sensitive, such as Read calendar, Modify calendar and Find accounts on device. Each is listed above with its platform sensitivity tier.

Is Duolingo: Language Lessons safe to use?

FlyTrap reports what an app contains, it does not issue a safety verdict. Duolingo: Language Lessons requests 43 permissions (8 sensitive) and bundles 39 third-party SDKs. Reviewing those alongside the developer helps you decide what you are comfortable granting.

What platforms is Duolingo: Language Lessons available on?

The version FlyTrap analyzed targets Android.

Same genre