UpTown Flashcards for Kids
PurpleBug Inc. · Build 1.7.17
Static checks identify review items, not a guarantee of safety.
Overview
2 finding categories to review
UpTown Flashcards for Kids (com.Purplebug.Uptown) scored grade A, 98 out of 100, in a static scan of version 1.7.17 on 2026-10-12. It has no high or critical findings, and 2 lower-severity finding categories across 3 occurrences. 5 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.
Start with these findings
lowFirebase Storage bucket reference1 occurrence
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
- 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.
lowGoogle API key (client-shipped; restriction unverified)2 occurrences
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
- 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.
Build & components
37 components recorded. Certificate parsing does not validate APK signature integrity.
Inspect build evidence →Findings
2 categories · 3 occurrences. Severity totals describe categories. Expand a finding for interpretation and review guidance.
lowFirebase Storage bucket reference1 occurrence
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
- 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
Pattern recorded; identifying value redacted.- Detector rule
firebase_storage_bucket- Recorded file locations
resources.arscassets/google-services-desktop.json
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 toolsSearch recorded evidence and save private review notes with Pro. $99/month plus applicable tax.
lowGoogle API key (client-shipped; restriction unverified)2 occurrences
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
- 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
resources.arsc- Recorded match
AIza•••••••• (21–40 chars, redacted)- Detector rule
google_api_key- Recorded file locations
resources.arsc
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 toolsSearch recorded evidence and save private review notes with Pro. $99/month plus applicable tax.
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Privacy signals
Capabilities and bundled software do not prove that data was collected or transmitted.
Camera
Requested permission inventory (14)
Data collection & flow (privacy signal, not part of the grade)
- Persistent-identifier APIs referenced in code (Advertising ID (AAID), Android ID, Device ID / IMEI) with 4 analytics/ad SDK(s) present — the mechanism used for cross-app profiling.
- Camera 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 comparison not recorded.
Trackers & SDKs (5 detected · privacy signal, not part of the grade)
Build & components
Scanned build 1.7.17. Store metadata may describe a newer release.
4251e1e434928ce944ee2dad4d50ae332d618c2f6ba3b200db46ba6dc362e758Signing certificate (who signed this build — factual, not part of the grade)
24:74:9f:92:00:f8:bb:4e:ea:b3:53:1c:35:b9:59:7e:6b:98:87:b0:a2:c7:11:e2:50:dc:83:34:d5:64:f0:ecThe certificate fingerprint identifies the parsed signing certificate. Knowing this public fingerprint does not establish ownership or validate the APK signature.
Component inventory
37 components. Advisory matching covers a curated set; no match is not proof that a component is vulnerability-free.
| Component | Version | Advisory matches |
|---|---|---|
androidx.activity:activity | 1.2.3 | None recorded |
androidx.annotation:annotation-experimental | 1.3.0 | None recorded |
androidx.arch.core:core-runtime | 2.1.0 | None recorded |
androidx.browser:browser | 1.4.0 | None recorded |
androidx.core:core | 1.9.0 | None recorded |
androidx.core:core-ktx | 1.9.0 | None recorded |
androidx.credentials:credentials | 1.2.0-rc01 | None recorded |
androidx.credentials:credentials-play-services-auth | 1.2.0-rc01 | None recorded |
androidx.customview:customview | 1.0.0 | None recorded |
androidx.datastore:datastore | 1.1.7 | None recorded |
androidx.datastore:datastore-core | 1.1.7 | None recorded |
androidx.datastore:datastore-preferences | 1.1.7 | None recorded |
androidx.datastore:datastore-preferences-core | 1.1.7 | None recorded |
androidx.documentfile:documentfile | 1.0.0 | None recorded |
androidx.fragment:fragment | 1.1.0 | None recorded |
androidx.interpolator:interpolator | 1.0.0 | None recorded |
androidx.legacy:legacy-support-core-utils | 1.0.0 | None recorded |
androidx.lifecycle:lifecycle-livedata | 2.0.0 | None recorded |
androidx.lifecycle:lifecycle-livedata-core | 2.3.1 | None recorded |
androidx.lifecycle:lifecycle-runtime | 2.3.1 | None recorded |
androidx.lifecycle:lifecycle-viewmodel | 2.3.1 | None recorded |
androidx.lifecycle:lifecycle-viewmodel-savedstate | 2.3.1 | None recorded |
androidx.loader:loader | 1.0.0 | None recorded |
androidx.localbroadcastmanager:localbroadcastmanager | 1.0.0 | None recorded |
androidx.print:print | 1.0.0 | None recorded |
androidx.privacysandbox.ads:ads-adservices | 1.1.0-beta11 | None recorded |
androidx.privacysandbox.ads:ads-adservices-java | 1.1.0-beta11 | None recorded |
androidx.savedstate:savedstate | 1.1.0 | None recorded |
androidx.tracing:tracing | 1.0.0 | None recorded |
androidx.versionedparcelable:versionedparcelable | 1.1.1 | None recorded |
androidx.viewpager:viewpager | 1.0.0 | None recorded |
com.google.play.common | 1.8.1 | None recorded |
com.google.play.core | 1.8.1 | None recorded |
com.google.play.review | 1.8.1 | None recorded |
kotlinx:coroutines_android | 1.9.0 | None recorded |
kotlinx:coroutines_core | 1.9.0 | None recorded |
kotlinx:coroutines_play_services | 1.9.0 | None recorded |
About this app · store information
About this app
UpTown Flashcards has high-quality and colorful flashcards for your kids!
Screenshots
Scan history
Each row is an observed scan. Gaps between scans do not establish how long a finding existed.
| Scanned (UTC) | Build | Score | Grade |
|---|---|---|---|
| 2026-10-12 18:09 UTC | 1.7.17 | 98 | A |
| 2026-10-05 17:54 UTC | 1.7.17 | 98 | A |
| 2026-09-28 17:53 UTC | 1.7.16 | 98 | A |
| 2026-09-20 02:28 UTC | 1.7.16 | 92 | A |
| 2026-09-11 21:46 UTC | 1.7.16 | 92 | A |
| 2026-09-10 01:05 UTC | 1.7.16 | Not graded | Not graded |
Export & share
Exports describe the recorded assessment. Signed evidence proves origin and integrity, not completeness or safety.
Coverage & gap matrix · Verify signed evidence
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API users can request authenticated, scan-specific exports at /v1/scans/e76ec7f3-a994-47bb-8fce-d6d0f51e4e9f/findings.sarif (also coverage.json and proof.json).
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