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LingoDeer - Learn Languages

LingoDeer - Learn Languages Apps · Build 2.99.413

com.lingodeer
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Static analysis completeScanned 2026-09-30 09:52 UTC

Static checks identify review items, not a guarantee of safety.

Overview

Analysis recorded

4 finding categories to review

LingoDeer - Learn Languages (com.lingodeer) scored grade A, 96 out of 100, in a static scan of version 2.99.413 on 2026-09-30. It has no high or critical findings, and 4 lower-severity finding categories across 7 occurrences. 8 tracking SDKs are present in the package, which describes what ships, not what runs or what it sends. This is static analysis of a single build: it does not observe the app running and does not establish that any data is exposed.

Finding categories47 occurrences
High / critical0Category count
Tracking SDKs8Presence, not observed traffic
Assessment score96 / 100Grade A

Start with these findings

lowAlibaba Cloud OSS bucket reference1 occurrence

Interpretation & review guidance

An Alibaba Cloud OSS bucket reference. Normal to use object storage; risky only if the bucket ACL allows public read/list.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.
Open in all findingsRequest a correction
lowFirebase Realtime Database reference2 occurrences

Interpretation & review guidance

A Firebase Realtime Database URL. Nearly every app that uses Firebase ships one. It's only an exposure if the database rules are world-readable — that's what live verification checks.

Evidence
2 recorded occurrences in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.
Open in all findingsRequest a correction
lowFirebase Storage bucket reference3 occurrences

Interpretation & review guidance

A Firebase Cloud Storage bucket reference (the default <project>.appspot.com). Storing user files here is normal — it's only an exposure if the Storage security rules allow public read/list, which live verification tests.

Evidence
3 recorded occurrences in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.
Open in all findingsRequest a correction
View all 4 categories

Privacy

22 requested permissions · 1 flagged high-risk classes.

Review privacy signals →

Build & components

130 components recorded. Certificate parsing does not validate APK signature integrity.

Inspect build evidence →
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Findings

4 categories · 7 occurrences. Severity totals describe categories. Expand a finding for interpretation and review guidance.

lowAlibaba Cloud OSS bucket reference1 occurrence

Interpretation & review guidance

An Alibaba Cloud OSS bucket reference. Normal to use object storage; risky only if the bucket ACL allows public read/list.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.

Evidence preview

Evidence type
Static string match
Representative location
classes3.dex
Recorded match
Pattern recorded; identifying value redacted.
Detector rule
alibaba_oss
Recorded file locations
  • classes3.dex

1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.

Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.

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Link to categoryRequest a correction
lowFirebase Realtime Database reference2 occurrences

Interpretation & review guidance

A Firebase Realtime Database URL. Nearly every app that uses Firebase ships one. It's only an exposure if the database rules are world-readable — that's what live verification checks.

Evidence
2 recorded occurrences in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.

Evidence preview

Evidence type
Static string match
Representative location
classes3.dex
Recorded match
Pattern recorded; identifying value redacted.
Detector rule
firebase_db
Recorded file locations
  • classes3.dex

2 recorded findings have inspectable metadata. Duplicate matches may share a representative location.

Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.

Preview evidence and Pro tools

Search recorded evidence and save private review notes with Pro. $99/month plus applicable tax.

Link to categoryRequest a correction
lowFirebase Storage bucket reference3 occurrences

Interpretation & review guidance

A Firebase Cloud Storage bucket reference (the default <project>.appspot.com). Storing user files here is normal — it's only an exposure if the Storage security rules allow public read/list, which live verification tests.

Evidence
3 recorded occurrences in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.

Evidence preview

Evidence type
Static string match
Representative location
resources.arsc
Recorded match
Pattern recorded; identifying value redacted.
Detector rule
firebase_storage_bucket
Recorded file locations
  • resources.arsc

3 recorded findings have inspectable metadata. Duplicate matches may share a representative location.

Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.

Preview evidence and Pro tools

Search recorded evidence and save private review notes with Pro. $99/month plus applicable tax.

Link to categoryRequest a correction
lowGoogle API key (client-shipped; restriction unverified)1 occurrence

Interpretation & review guidance

Android apps are designed to ship Google API keys in the client; Google restricts them by app signing certificate + enabled API. This is only a problem if the key is left unrestricted — presence alone is expected, not an exposure.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
Static detection; current reachability is not established.

Evidence preview

Evidence type
Static string match
Representative location
resources.arsc
Recorded match
AIza•••••••• (21–40 chars, redacted)
Detector rule
google_api_key
Recorded file locations
  • resources.arsc

1 recorded findings have inspectable metadata. Duplicate matches may share a representative location.

Review whether this belongs to intended app functionality or a bundled library. A static match does not establish runtime impact.

Preview evidence and Pro tools

Search recorded evidence and save private review notes with Pro. $99/month plus applicable tax.

Link to categoryRequest a correction

Privacy signals

Capabilities and bundled software do not prove that data was collected or transmitted.

Requested permissions22
Flagged high-risk classes1
Detected SDKs8

Microphone

Requested permission inventory (22)
  • android.permission.ACCESS_ADSERVICES_AD_ID
  • android.permission.ACCESS_ADSERVICES_ATTRIBUTION
  • android.permission.ACCESS_ADSERVICES_CUSTOM_AUDIENCE
  • android.permission.ACCESS_ADSERVICES_TOPICS
  • android.permission.ACCESS_NETWORK_STATE
  • android.permission.FOREGROUND_SERVICE
  • android.permission.INTERNET
  • android.permission.POST_NOTIFICATIONS
  • android.permission.QUICKBOOT_POWERON
  • android.permission.REBOOT
  • android.permission.RECEIVE_BOOT_COMPLETED
  • android.permission.RECORD_AUDIO
  • android.permission.SCHEDULE_EXACT_ALARM
  • android.permission.VIBRATE
  • android.permission.WAKE_LOCK
  • com.android.vending.BILLING
  • com.android.vending.CHECK_LICENSE
  • com.google.android.c2dm.permission.RECEIVE
  • com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
  • com.google.android.gms.permission.AD_ID
  • com.google.android.providers.gsf.permission.READ_GSERVICES
  • com.lingodeer.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

Data collection & flow (privacy signal, not part of the grade)

Data the app can access
Microphone
Microphone
Persistent identifiers (referenced in code)
Advertising ID (AAID)Android IDDevice ID / IMEI
Where it can go
Third parties present (6)
Google AdMobGoogle Analytics for FirebaseGoogle Firebase AnalyticsGoogle Tag ManagerMeta / Facebook SDKAdjust
  • Persistent-identifier APIs referenced in code (Advertising ID (AAID), Android ID, Device ID / IMEI) with 6 analytics/ad SDK(s) present — the mechanism used for cross-app profiling.
  • Microphone data requested with third-party analytics/ad SDKs present.

This maps what the app can access (permissions it requests, identifier APIs its code references) to the third parties bundled in it. It reflects capability and SDK presence — not proof that a specific value was transmitted.

Data Safety: declared vs observed (Play label vs our analysis)

Declared collected
App activityApp info and performanceDevice or other IDsFiles and docsFinancial infoLocationMessagesPersonal infoPhotos and videos
Declared shared
App activityApp info and performanceDevice or other IDsLocation
We observe the app can access
no sensitive access observed
✓ No obvious mismatch between the declaration and what we observe.

We compare the developer's Google Play Data Safety declaration with what the binary can actually do (permissions it requests, identifier APIs and third-party SDKs it ships). A mismatch is a capability signal to confirm — a requested permission is not proof of collection.

Trackers & SDKs (8 detected · privacy signal, not part of the grade)

Advertising
Google AdMob
Analytics
Google Analytics for FirebaseGoogle Firebase AnalyticsGoogle Tag ManagerMeta / Facebook SDK
Attribution
Adjust
Consent
IAB TCF
Crash reporting
Google Crashlytics

Build & components

Scanned build 2.99.413. Store metadata may describe a newer release.

APK SHA-25618bdb9fbcec42ac9ec7c6fb5ee282b4ed0dc5fb2e47e7fb5ec81c6e2c21c950b

Signing certificate (who signed this build — factual, not part of the grade)

Signer
lingodeer self-signed
Scheme
V3V2
Key
RSA 2048-bit
Algorithm
sha256WithRSA
Validity
2017-08-07 → 2042-08-01
Cert SHA-256
b3:41:b1:d8:55:ee:55:eb:2c:6c:92:87:ea:af:c6:44:9c:0b:34:06:5e:17:0a:f7:bf:5b:c2:1a:03:f0:5b:f2

The certificate fingerprint identifies the parsed signing certificate. Knowing this public fingerprint does not establish ownership or validate the APK signature.

Signature integrity: not established by certificate parsing.

Component inventory

130 components. Advisory matching covers a curated set; no match is not proof that a component is vulnerability-free.

Bundled components and recorded advisory matches
ComponentVersionAdvisory matches
androidx.activity:activity1.10.1None recorded
androidx.activity:activity-compose1.10.1None recorded
androidx.activity:activity-ktx1.10.1None recorded
androidx.annotation:annotation-experimental1.4.1None recorded
androidx.appcompat:appcompat1.7.1None recorded
androidx.appcompat:appcompat-resources1.7.1None recorded
androidx.asynclayoutinflater:asynclayoutinflater1.0.0None recorded
androidx.autofill:autofill1.0.0None recorded
androidx.browser:browser1.4.0None recorded
androidx.cardview:cardview1.0.0None recorded
androidx.compose.animation:animation1.9.0None recorded
androidx.compose.animation:animation-core1.9.0None recorded
androidx.compose.foundation:foundation1.9.0None recorded
androidx.compose.foundation:foundation-layout1.9.0None recorded
androidx.compose.material3:material31.3.2None recorded
androidx.compose.material3:material3-window-size-class1.3.2None recorded
androidx.compose.material:material-icons-core1.7.8None recorded
androidx.compose.material:material-ripple1.9.0None recorded
androidx.compose.runtime:runtime1.10.5None recorded
androidx.compose.runtime:runtime-annotation1.10.5None recorded
androidx.compose.runtime:runtime-livedata1.10.5None recorded
androidx.compose.runtime:runtime-retain1.10.5None recorded
androidx.compose.runtime:runtime-saveable1.10.5None recorded
androidx.compose.ui:ui1.10.5None recorded
androidx.compose.ui:ui-geometry1.10.5None recorded
androidx.compose.ui:ui-graphics1.10.5None recorded
androidx.compose.ui:ui-text1.10.5None recorded
androidx.compose.ui:ui-text-google-fonts1.10.5None recorded
androidx.compose.ui:ui-tooling-preview1.10.5None recorded
androidx.compose.ui:ui-unit1.10.5None recorded
androidx.compose.ui:ui-util1.10.5None recorded
androidx.compose.ui:ui-viewbinding1.10.5None recorded
androidx.constraintlayout:constraintlayout2.2.1None recorded
androidx.coordinatorlayout:coordinatorlayout1.1.0None recorded
androidx.core:core1.16.0None recorded
androidx.core:core-ktx1.16.0None recorded
androidx.core:core-remoteviews1.1.0None recorded
androidx.core:core-viewtree1.0.0None recorded
androidx.credentials:credentials1.2.0-rc01None recorded
androidx.credentials:credentials-play-services-auth1.2.0-rc01None recorded
androidx.cursoradapter:cursoradapter1.0.0None recorded
androidx.customview:customview1.1.0None recorded
androidx.customview:customview-poolingcontainer1.0.0None recorded
androidx.databinding:viewbinding8.13.2None recorded
androidx.datastore:datastore1.1.7None recorded
androidx.datastore:datastore-core1.1.7None recorded
androidx.datastore:datastore-preferences1.1.7None recorded
androidx.datastore:datastore-preferences-core1.1.7None recorded
androidx.documentfile:documentfile1.0.0None recorded
androidx.drawerlayout:drawerlayout1.1.1None recorded
androidx.dynamicanimation:dynamicanimation1.1.0None recorded
androidx.emoji2:emoji21.4.0None recorded
androidx.emoji2:emoji2-views-helper1.4.0None recorded
androidx.exifinterface:exifinterface1.3.7None recorded
androidx.fragment:fragment1.8.9None recorded
androidx.fragment:fragment-compose1.8.9None recorded
androidx.fragment:fragment-ktx1.8.9None recorded
androidx.glance:glance1.1.1None recorded
androidx.glance:glance-appwidget1.1.1None recorded
androidx.graphics:graphics-path1.0.1None recorded
androidx.graphics:graphics-shapes1.0.1None recorded
androidx.interpolator:interpolator1.0.0None recorded
androidx.legacy:legacy-support-core-ui1.0.0None recorded
androidx.legacy:legacy-support-core-utils1.0.0None recorded
androidx.legacy:legacy-support-v41.0.0None recorded
androidx.lifecycle:lifecycle-livedata2.9.4None recorded
androidx.lifecycle:lifecycle-livedata-core2.9.4None recorded
androidx.lifecycle:lifecycle-livedata-core-ktx2.9.4None recorded
androidx.lifecycle:lifecycle-livedata-ktx2.9.4None recorded
androidx.lifecycle:lifecycle-process2.9.4None recorded
androidx.lifecycle:lifecycle-runtime2.9.4None recorded
androidx.lifecycle:lifecycle-runtime-compose2.9.4None recorded
androidx.lifecycle:lifecycle-runtime-ktx2.9.4None recorded
androidx.lifecycle:lifecycle-service2.9.4None recorded
androidx.lifecycle:lifecycle-viewmodel2.9.4None recorded
androidx.lifecycle:lifecycle-viewmodel-compose2.9.4None recorded
androidx.lifecycle:lifecycle-viewmodel-ktx2.9.4None recorded
androidx.lifecycle:lifecycle-viewmodel-savedstate2.9.4None recorded
androidx.loader:loader1.1.0None recorded
androidx.localbroadcastmanager:localbroadcastmanager1.0.0None recorded
androidx.media:media1.0.0None recorded
androidx.navigation:navigation-common2.9.3None recorded
androidx.navigation:navigation-compose2.9.3None recorded
androidx.navigation:navigation-runtime2.9.3None recorded
androidx.paging:paging-common3.3.6None recorded
androidx.paging:paging-compose3.3.6None recorded
androidx.paging:paging-runtime3.3.6None recorded
androidx.paging:paging-runtime-ktx3.3.6None recorded
androidx.paging:paging-rxjava33.3.6None recorded
androidx.preference:preference1.2.1None recorded
androidx.preference:preference-ktx1.2.1None recorded
androidx.print:print1.0.0None recorded
androidx.privacysandbox.ads:ads-adservices1.1.0-beta11None recorded
androidx.privacysandbox.ads:ads-adservices-java1.1.0-beta11None recorded
androidx.profileinstaller:profileinstaller1.4.0None recorded
androidx.recyclerview:recyclerview1.3.0None recorded
androidx.room:room-guava2.7.2None recorded
androidx.room:room-ktx2.7.2None recorded
androidx.room:room-runtime2.7.2None recorded
androidx.savedstate:savedstate1.3.3None recorded
androidx.savedstate:savedstate-compose1.3.3None recorded
androidx.savedstate:savedstate-ktx1.3.3None recorded
androidx.slidingpanelayout:slidingpanelayout1.2.0None recorded
androidx.sqlite:sqlite2.5.1None recorded
androidx.sqlite:sqlite-framework2.5.1None recorded
androidx.startup:startup-runtime1.2.0None recorded
androidx.swiperefreshlayout:swiperefreshlayout1.0.0None recorded
androidx.tracing:tracing1.2.0None recorded
androidx.tracing:tracing-ktx1.2.0None recorded
androidx.transition:transition1.6.0None recorded
androidx.vectordrawable:vectordrawable1.2.0None recorded
androidx.vectordrawable:vectordrawable-animated1.2.0None recorded
androidx.versionedparcelable:versionedparcelable1.1.1None recorded
androidx.viewpager2:viewpager21.0.0None recorded
androidx.viewpager:viewpager1.0.0None recorded
androidx.webkit:webkit1.14.0None recorded
androidx.window:window1.5.0None recorded
androidx.window:window-core1.5.0None recorded
androidx.work:work-runtime2.10.3None recorded
androidx.work:work-runtime-ktx2.10.3None recorded
androidx.work:work-rxjava32.10.3None recorded
com.google.android.material:material1.13.0None recorded
com.squareup.okhttp3:okhttp5.1.0None recorded
kotlinx:coroutines_android1.10.2None recorded
kotlinx:coroutines_core1.10.2None recorded
kotlinx:coroutines_guava1.10.2None recorded
kotlinx:coroutines_play_services1.10.2None recorded
kotlinx:coroutines_reactive1.10.2None recorded
kotlinx:coroutines_rx31.10.2None recorded
org.jetbrains.compose.ui:ui-backhandler1.8.2None recorded
Export SBOM
About this app · store information

About this app

Learn Japanese, Korean,Spanish, French, German, Chinese with interactive lessons

Content ratingEveryone
Download size79.3 MB
Privacy policyPublished →
Developer sitewww.lingodeer.com

Screenshots

App screenshotApp screenshotApp screenshotApp screenshotApp screenshotApp screenshotApp screenshotApp screenshot

Scan history

Each row is an observed scan. Gaps between scans do not establish how long a finding existed.

Scanned (UTC)BuildScoreGrade
2026-09-30 09:52 UTC2.99.41396A
2026-09-16 02:18 UTC2.99.41396A
2026-09-07 06:42 UTC2.99.41396A

View changes between the last two scans →

Export & share

Exports describe the recorded assessment. Signed evidence proves origin and integrity, not completeness or safety.

SARIFFindings CSVCoverage JSONSigned evidenceSBOM

Coverage & gap matrix · Verify signed evidence

Embed the latest grade

Embed this grade

The badge reads the latest recorded grade each time it is loaded, and links back to the full report so a reader can see the build it covers and what the scan could not see.

apk-scanner.com exposure grade
Markdown
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HTML
<a href="https://apk-scanner.com/app/com.lingodeer"><img src="https://apk-scanner.com/app/com.lingodeer/badge.svg" alt="apk-scanner.com exposure grade" height="20"></a>

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API users can request authenticated, scan-specific exports at /v1/scans/1acc554a-73b6-4749-ba1f-788af8e136ef/findings.sarif (also coverage.json and proof.json).

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