Period Tracker & Calendar

HMT Developer · Build 1.3.3

com.hamatim.periodtracker
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Static analysis completeScanned 2026-11-05 00:24 UTC

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

Backend checks: 3 unauthenticated read checks against backends referenced in this build — 2 refused access, 1 answered. Each check describes one request at the recorded scan time and does not establish the backend's current state.

Overview

Review needed

1 high or critical finding category to review

Period Tracker & Calendar (com.hamatim.periodtracker) scored grade D, 42 out of 100, in a static scan of version 1.3.3 on 2026-11-05. It has 1 high or critical finding category of 4, across 4 occurrences. One finding was confirmed live: an anonymous request reached a backend the app references and it answered without authentication. No credential was used and no stored data was read. 6 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 categories44 occurrences
High / critical1Category count
Tracking SDKs6Presence, not observed traffic
Assessment score42 / 100Grade D

Start with these findings

criticalCloud Firestore publicly readable — confirmed reachable1 occurrence

Interpretation & review guidance

Cloud Firestore was confirmed publicly readable — the database's security rules allow anyone to read documents without authentication. This is a real data-exposure risk; lock the rules to require auth.

Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
1 historically verified occurrence at the recorded scan time. Current reachability is not established.
Open in all findingsRequest a correction
lowFirebase Realtime Database reference1 occurrence

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.

Remediation: Fix a publicly readable Firebase database →

Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.

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 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.

Remediation: Fix a publicly readable Firebase database →

Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.

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
View all 4 categories

Privacy

15 requested permissions · 0 flagged high-risk classes.

Review privacy signals →

Build & components

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

Inspect build evidence →
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Findings

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

criticalCloud Firestore publicly readable — confirmed reachable1 occurrence

Interpretation & review guidance

Cloud Firestore was confirmed publicly readable — the database's security rules allow anyone to read documents without authentication. This is a real data-exposure risk; lock the rules to require auth.

Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.

Evidence
1 recorded occurrence in the analyzed APK. These are distinct stored findings, not a count of every source match.
Verification
1 historically verified occurrence at the recorded scan time. Current reachability is not established.

Evidence preview

Evidence type
Static string match
Representative location
firestore/phone-app-595da
Recorded match
Pattern recorded; identifying value redacted.

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

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Link to categoryRequest a correction
lowFirebase Realtime Database reference1 occurrence

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.

Remediation: Fix a publicly readable Firebase database →

Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.

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_db
Recorded file locations
  • resources.arsc
  • _split_config.arm64_v8a/lib/arm64-v8a/libapp.so

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
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.

Remediation: Fix a publicly readable Firebase database →

Reference: CWE-200 · CWE-284 · MASVS-STORAGE-2 — what the control asks for, and other apps with the same finding.

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.arsc
  • _split_config.arm64_v8a/lib/arm64-v8a/libapp.so

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
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.

Remediation: How to store secrets in a mobile app (without hardcoding) →

Reference: CWE-798 · MASVS-STORAGE-1 — what the control asks for, and other apps with the same finding.

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
  • _split_config.arm64_v8a/lib/arm64-v8a/libapp.so

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 permissions15
Flagged high-risk classes0
Detected SDKs6
Requested permission inventory (15)
  • android.permission.ACCESS_ADSERVICES_AD_ID
  • android.permission.ACCESS_ADSERVICES_ATTRIBUTION
  • android.permission.ACCESS_NETWORK_STATE
  • android.permission.FOREGROUND_SERVICE
  • android.permission.INTERNET
  • android.permission.POST_NOTIFICATIONS
  • android.permission.RECEIVE_BOOT_COMPLETED
  • android.permission.USE_BIOMETRIC
  • android.permission.USE_FINGERPRINT
  • android.permission.VIBRATE
  • android.permission.WAKE_LOCK
  • com.android.vending.CHECK_LICENSE
  • com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
  • com.google.android.gms.permission.AD_ID
  • com.hamatim.periodtracker.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

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

Data the app can access
No sensitive runtime permissions requested.
Persistent identifiers (referenced in code)
Advertising ID (AAID)Android IDDevice ID / IMEI
Where it can go
Third parties present (4)
Google AdMobGoogle Analytics for FirebaseGoogle Firebase AnalyticsGoogle Tag Manager
  • 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.

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 (6 detected · privacy signal, not part of the grade)

Advertising
Google AdMob
Analytics
Google Analytics for FirebaseGoogle Firebase AnalyticsGoogle Tag Manager
Consent
IAB TCF
Crash reporting
Google Crashlytics

Build & components

Scanned build 1.3.3. Store metadata may describe a newer release.

APK SHA-2569b38aa9af73d7e97e9d5a6fbebe39d1afb4528d3fbff43b889d50aa1ef88677b

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

Signer
Google Inc. self-signed
Scheme
V3V2
Key
RSA 4096-bit
Algorithm
sha256WithRSA
Validity
2026-08-12 → 2056-08-12
Cert SHA-256
14:18:4f:78:49:d9:43:d5:85:0a:47:f6:de:22:09:3b:c6:28:02:0c:73:eb:e6:c8:25:b3:59:b1:79:f8:89:4d

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

75 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:activity1.9.0None recorded
androidx.activity:activity-ktx1.9.0None recorded
androidx.annotation:annotation-experimental1.4.1None recorded
androidx.appcompat:appcompat1.2.0None recorded
androidx.appcompat:appcompat-resources1.2.0None recorded
androidx.asynclayoutinflater:asynclayoutinflater1.0.0None recorded
androidx.biometric:biometric1.1.0None recorded
androidx.browser:browser1.9.0None recorded
androidx.compose.runtime:runtime1.2.1None recorded
androidx.compose.ui:ui-geometry1.1.1None recorded
androidx.compose.ui:ui-graphics1.1.1None recorded
androidx.compose.ui:ui-unit1.1.1None recorded
androidx.compose.ui:ui-util1.1.1None recorded
androidx.coordinatorlayout:coordinatorlayout1.0.0None recorded
androidx.core:core1.17.0None recorded
androidx.core:core-ktx1.17.0None recorded
androidx.core:core-remoteviews1.1.0None recorded
androidx.core:core-viewtree1.0.0None recorded
androidx.cursoradapter:cursoradapter1.0.0None recorded
androidx.customview:customview1.1.0None 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:drawerlayout1.0.0None recorded
androidx.fragment:fragment1.8.9None recorded
androidx.fragment:fragment-ktx1.8.9None recorded
androidx.glance:glance1.1.1None recorded
androidx.glance:glance-appwidget1.1.1None 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.lifecycle:lifecycle-livedata2.7.0None recorded
androidx.lifecycle:lifecycle-livedata-core2.7.0None recorded
androidx.lifecycle:lifecycle-livedata-core-ktx2.7.0None recorded
androidx.lifecycle:lifecycle-process2.7.0None recorded
androidx.lifecycle:lifecycle-runtime2.7.0None recorded
androidx.lifecycle:lifecycle-runtime-ktx2.7.0None recorded
androidx.lifecycle:lifecycle-service2.7.0None recorded
androidx.lifecycle:lifecycle-viewmodel2.7.0None recorded
androidx.lifecycle:lifecycle-viewmodel-ktx2.7.0None recorded
androidx.lifecycle:lifecycle-viewmodel-savedstate2.7.0None recorded
androidx.loader:loader1.0.0None recorded
androidx.localbroadcastmanager:localbroadcastmanager1.0.0None recorded
androidx.media:media1.1.0None recorded
androidx.preference:preference1.2.1None 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:profileinstaller1.3.1None recorded
androidx.recyclerview:recyclerview1.0.0None recorded
androidx.room:room-runtime2.7.0None recorded
androidx.savedstate:savedstate1.2.1None recorded
androidx.savedstate:savedstate-ktx1.2.1None recorded
androidx.slidingpanelayout:slidingpanelayout1.2.0None recorded
androidx.sqlite:sqlite2.5.0None recorded
androidx.sqlite:sqlite-framework2.5.0None recorded
androidx.startup:startup-runtime1.1.1None recorded
androidx.swiperefreshlayout:swiperefreshlayout1.0.0None recorded
androidx.tracing:tracing1.2.0None recorded
androidx.tracing:tracing-ktx1.2.0None recorded
androidx.transition:transition1.4.1None recorded
androidx.vectordrawable:vectordrawable1.1.0None recorded
androidx.vectordrawable:vectordrawable-animated1.1.0None recorded
androidx.versionedparcelable:versionedparcelable1.1.1None recorded
androidx.viewpager:viewpager1.0.0None recorded
androidx.window.extensions.core:core1.0.0None recorded
androidx.window:window1.2.0None recorded
androidx.window:window-java1.2.0None recorded
androidx.work:work-runtime2.11.2None recorded
androidx.work:work-runtime-ktx2.11.2None recorded
kotlinx:coroutines_android1.10.2None recorded
kotlinx:coroutines_core1.10.2None recorded
kotlinx:coroutines_play_services1.10.2None recorded
Export SBOM
About this app · store information

About this app

Private offline period tracker for cycles, ovulation and symptoms. No account.

Content ratingEveryone
Download size24.2 MB
Privacy policyPublished →
Developer sitehamatim.com

Screenshots

App screenshotApp screenshotApp screenshotApp screenshotApp screenshotApp screenshotApp screenshot

Other apps by HMT Developer

Published under the same developer name on Google Play, and scanned here. Each grade describes that app's own recorded build — it says nothing about this one.

Scan history

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

Scanned (UTC)BuildScoreGrade
2026-11-05 00:24 UTC1.3.342D

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

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Embed this grade

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apk-scanner.com exposure grade
Markdown
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HTML
<a href="https://apk-scanner.com/app/com.hamatim.periodtracker"><img src="https://apk-scanner.com/app/com.hamatim.periodtracker/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/6f4f25f3-5d82-4c54-b630-fd61191923d9/findings.sarif (also coverage.json and proof.json).

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