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Jepster | Bike computer

Tom Wassink · Build 9.0.0.1

com.twom.bico
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Static analysis completeScanned 2026-10-13 10:21 UTC

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

Overview

Analysis recorded

2 finding categories to review

Jepster | Bike computer (com.twom.bico) scored grade A, 98 out of 100, in a static scan of version 9.0.0.1 on 2026-10-13. It has no high or critical findings, and 2 lower-severity finding categories across 3 occurrences. 2 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 categories23 occurrences
High / critical0Category count
Tracking SDKs2Presence, not observed traffic
Assessment score98 / 100Grade A

Start with these findings

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.

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
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.
Open in all findingsRequest a correction
View all 2 categories

Privacy

26 requested permissions · 4 flagged high-risk classes.

Review privacy signals →

Build & components

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

Inspect build evidence →
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Findings

2 categories · 3 occurrences. Severity totals describe categories. Expand a finding for interpretation and review guidance.

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.

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

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
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 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 permissions26
Flagged high-risk classes4
Detected SDKs2

Background location Precise location Approx. location Body sensors

Requested permission inventory (26)
  • android.permission.ACCESS_BACKGROUND_LOCATION
  • android.permission.ACCESS_COARSE_LOCATION
  • android.permission.ACCESS_FINE_LOCATION
  • android.permission.ACCESS_NETWORK_STATE
  • android.permission.ACCESS_WIFI_STATE
  • android.permission.BLUETOOTH_CONNECT
  • android.permission.BLUETOOTH_SCAN
  • android.permission.BODY_SENSORS
  • android.permission.FOREGROUND_SERVICE
  • android.permission.FOREGROUND_SERVICE_DATA_SYNC
  • android.permission.FOREGROUND_SERVICE_HEALTH
  • android.permission.FOREGROUND_SERVICE_LOCATION
  • android.permission.HIGH_SAMPLING_RATE_SENSORS
  • android.permission.INTERNET
  • android.permission.POST_NOTIFICATIONS
  • android.permission.RECEIVE_BOOT_COMPLETED
  • android.permission.USE_FULL_SCREEN_INTENT
  • android.permission.WAKE_LOCK
  • android.permission.health.READ_HEART_RATE
  • com.android.vending.BILLING
  • com.android.vending.CHECK_LICENSE
  • com.dsi.ant.permission.ANT
  • com.dsi.ant.permission.ANT_ADMIN
  • com.google.android.providers.gsf.permission.READ_GSERVICES
  • com.twom.bico.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
  • com.twom.bico.permission.MAPS_RECEIVE

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

Data the app can access
Health & body
Body sensors
Location
Precise locationApproximate locationBackground location
Photos & files
Storage (write)
Persistent identifiers (referenced in code)
Android IDDevice ID / IMEI
Where it can go
Third parties present (1)
Google Firebase Analytics
  • Persistent-identifier APIs referenced in code (Android ID, Device ID / IMEI) with 1 analytics/ad SDK(s) present — the mechanism used for cross-app profiling.
  • Health & body, Photos & files 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 (2 detected · privacy signal, not part of the grade)

Analytics
Google Firebase Analytics
Crash reporting
Google Crashlytics

Build & components

Scanned build 9.0.0.1. Store metadata may describe a newer release.

APK SHA-2564bcc51af46994db690f8ae0eeea28b89ccb1bebbae1ce7188b95a16ffff7e09a

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

Signer
Tom Wassink self-signed
Scheme
V3V2
Key
RSA 2048-bit
Algorithm
sha256WithRSA
Validity
2015-03-05 → 3013-07-06
Cert SHA-256
f7:a1:36:d7:4a:f5:17:73:c6:6a:ee:23:b6:91:52:4a:45:00:d4:07:00:9d:2e:9b:d4:96:f7:58:14:7f:56:b5

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

70 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:activity1.13.0None recorded
androidx.activity:activity-ktx1.13.0None recorded
androidx.annotation:annotation-experimental1.4.1None recorded
androidx.appcompat:appcompat1.8.0None recorded
androidx.appcompat:appcompat-resources1.8.0None recorded
androidx.asynclayoutinflater:asynclayoutinflater1.0.0None recorded
androidx.browser:browser1.10.0None recorded
androidx.cardview:cardview1.0.0None recorded
androidx.compose.runtime:runtime-annotation1.9.0None recorded
androidx.constraintlayout:constraintlayout2.2.1None recorded
androidx.coordinatorlayout:coordinatorlayout1.1.0None recorded
androidx.core:core1.19.0None recorded
androidx.core:core-ktx1.19.0None recorded
androidx.core:core-viewtree1.0.0None recorded
androidx.cursoradapter:cursoradapter1.0.0None recorded
androidx.customview:customview1.2.0None recorded
androidx.customview:customview-poolingcontainer1.0.0None 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:drawerlayout1.1.1None recorded
androidx.dynamicanimation:dynamicanimation1.1.0None recorded
androidx.emoji2:emoji21.3.0None recorded
androidx.emoji2:emoji2-views-helper1.3.0None recorded
androidx.exifinterface:exifinterface1.0.0None recorded
androidx.fragment:fragment1.5.7None recorded
androidx.fragment:fragment-ktx1.3.6None recorded
androidx.graphics:graphics-shapes1.0.1None recorded
androidx.health.connect:connect-client1.1.0None 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-extensions2.2.0None recorded
androidx.loader:loader1.1.0None recorded
androidx.localbroadcastmanager:localbroadcastmanager1.0.0None recorded
androidx.media:media1.0.0None recorded
androidx.navigationevent:navigationevent1.0.0None recorded
androidx.percentlayout:percentlayout1.0.0None recorded
androidx.preference:preference1.2.1None recorded
androidx.preference:preference-ktx1.2.1None recorded
androidx.print:print1.0.0None recorded
androidx.profileinstaller:profileinstaller1.4.0None recorded
androidx.recyclerview:recyclerview1.4.0None recorded
androidx.room:room-ktx2.5.0None recorded
androidx.room:room-runtime2.5.0None recorded
androidx.savedstate:savedstate1.2.1None recorded
androidx.savedstate:savedstate-ktx1.2.1None recorded
androidx.slidingpanelayout:slidingpanelayout1.2.0None recorded
androidx.sqlite:sqlite2.3.0None recorded
androidx.sqlite:sqlite-framework2.3.0None recorded
androidx.startup:startup-runtime1.2.0None recorded
androidx.swiperefreshlayout:swiperefreshlayout1.0.0None recorded
androidx.tracing:tracing1.2.0None recorded
androidx.transition:transition1.5.0None recorded
androidx.vectordrawable:vectordrawable1.1.0None recorded
androidx.vectordrawable:vectordrawable-animated1.1.0None recorded
androidx.versionedparcelable:versionedparcelable1.1.1None recorded
androidx.viewpager2:viewpager21.1.0-beta02None recorded
androidx.viewpager:viewpager1.0.0None recorded
androidx.window:window1.0.0None recorded
androidx.work:work-runtime2.9.1None recorded
com.google.android.material:material1.14.0None recorded
com.squareup.okhttp3:okhttp5.5.0None recorded
kotlinx:coroutines_android1.11.0None recorded
kotlinx:coroutines_core1.11.0None recorded
kotlinx:coroutines_guava1.11.0None recorded
kotlinx:coroutines_play_services1.11.0None recorded
Export SBOM
About this app · store information

About this app

Android app to use your mobile phone as a bike computer.

Content ratingEveryone
Download size33.8 MB
Privacy policyPublished →
Developer sitewww.jepster.nl/

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
2026-10-13 10:21 UTC9.0.0.198A
2026-10-06 09:37 UTC9.0.0.198A
2026-09-02 10:25 UTC8.0.2.198A
2026-08-31 23:34 UTC8.0.2.198A

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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apk-scanner.com exposure grade
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