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Joist Invoice & Estimate App

Joist Software Inc. · Build 3.86.0

com.joistapp.android.joist
Static analysis completeScanned 2026-09-29 09:43 UTC

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

Overview

Review needed

1 high or critical finding category to review

Joist Invoice & Estimate App (com.joistapp.android.joist) scored grade B, 76 out of 100, in a static scan of version 3.86.0 on 2026-09-29. It has 1 high or critical finding among 7 finding categories across 10 occurrences. 12 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 categories710 occurrences
High / critical1Category count
Tracking SDKs12Presence, not observed traffic
Assessment score76 / 100Grade B

Start with these findings

highHardcoded HTTP Basic-auth credentials1 occurrence

Interpretation & review guidance

Hardcoded HTTP Basic-auth credentials (a username:password pair, base64-encoded in an Authorization header) are embedded in the app. If the endpoint is live, anyone can extract and reuse them — rotate the credential and move auth server-side. Confirm it isn't a placeholder.

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.
lowAmazon S3 bucket reference1 occurrence

Interpretation & review guidance

A reference to an Amazon S3 bucket. Using cloud storage is normal — the risk exists only if the bucket allows anonymous listing/read, which requires a separate authorized assessment.

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.
lowBIP39 wallet seed phrase (12 words, checksum valid) (third-party library artifact, shared across 12 unrelated developers)1 occurrence

Interpretation & review guidance

A BIP39 mnemonic seed phrase with a valid checksum is embedded in the app. This is the master key to a cryptocurrency wallet — anyone with it controls the funds. Extremely high risk; if it is a real wallet, move the funds and generate a new seed immediately.

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.
View all 7 categories

Privacy

37 requested permissions · 6 flagged high-risk classes.

Review privacy signals →

Build & components

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

Inspect build evidence →

Findings

7 categories · 10 occurrences. Severity totals describe categories. Expand a finding for interpretation and review guidance.

highHardcoded HTTP Basic-auth credentials1 occurrence

Interpretation & review guidance

Hardcoded HTTP Basic-auth credentials (a username:password pair, base64-encoded in an Authorization header) are embedded in the app. If the endpoint is live, anyone can extract and reuse them — rotate the credential and move auth server-side. Confirm it isn't a placeholder.

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
basic_auth_header
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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lowAmazon S3 bucket reference1 occurrence

Interpretation & review guidance

A reference to an Amazon S3 bucket. Using cloud storage is normal — the risk exists only if the bucket allows anonymous listing/read, which requires a separate authorized assessment.

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
classes11.dex
Recorded match
Pattern recorded; identifying value redacted.
Detector rule
s3_path_url
Recorded file locations
  • classes11.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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lowBIP39 wallet seed phrase (12 words, checksum valid) (third-party library artifact, shared across 12 unrelated developers)1 occurrence

Interpretation & review guidance

A BIP39 mnemonic seed phrase with a valid checksum is embedded in the app. This is the master key to a cryptocurrency wallet — anyone with it controls the funds. Extremely high risk; if it is a real wallet, move the funds and generate a new seed immediately.

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
classes13.dex
Recorded match
Pattern recorded; identifying value redacted.
Detector rule
bip39
Recorded file locations
  • classes13.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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lowData Safety label omits Contacts2 occurrences

Interpretation & review guidance

The app's Google Play Data Safety label omits a data category it can actually access — a permission it requests, or an advertising/device identifier it references. Under-declaring collection is a Play policy issue and a COPPA/privacy concern. This is a static signal: a requested permission is capability, not proof of collection — confirm against runtime behavior.

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
data-safety:Contacts
Recorded match
Pattern recorded; identifying value redacted.

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.

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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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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.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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lowGoogle API key (client-shipped; restriction unverified)3 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
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
classes3.dex
Recorded match
AIza•••••••• (21–40 chars, redacted)
Detector rule
google_api_key
Recorded file locations
  • classes3.dex
  • classes9.dex

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.

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Privacy signals

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

Requested permissions37
Flagged high-risk classes6
Detected SDKs12

Precise location Approx. location Camera Microphone Contacts Draw over other apps

Requested permission inventory (37)
  • 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_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.CAMERA
  • android.permission.FLASHLIGHT
  • android.permission.FOREGROUND_SERVICE
  • android.permission.FOREGROUND_SERVICE_DATA_SYNC
  • android.permission.INTERNET
  • android.permission.KB_WHITELIST_NFC
  • android.permission.NFC
  • android.permission.POST_NOTIFICATIONS
  • android.permission.READ_BASIC_PHONE_STATE
  • android.permission.READ_CONTACTS
  • android.permission.READ_INTERNAL_STORAGE
  • android.permission.RECEIVE_BOOT_COMPLETED
  • android.permission.RECORD_AUDIO
  • android.permission.REORDER_TASKS
  • android.permission.REQUEST_COMPANION_USE_DATA_IN_BACKGROUND
  • android.permission.SYSTEM_ALERT_WINDOW
  • android.permission.VIBRATE
  • android.permission.WAKE_LOCK
  • android.permission.WRITE_INTERNAL_STORAGE
  • com.android.vending.BILLING
  • com.google.android.c2dm.permission.RECEIVE
  • com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
  • com.google.android.gms.permission.AD_ID
  • com.huawei.appmarket.service.commondata.permission.GET_COMMON_DATA
  • com.joistapp.android.joist.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
  • com.joistapp.permission.BecomeUser
  • com.samsung.android.mapsagent.permission.READ_APP_INFO

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

Data the app can access
Camera
Camera
Contacts
Contacts
Location
Approximate locationPrecise location
Microphone
Microphone
Photos & files
Storage (write)Storage
Persistent identifiers (referenced in code)
Advertising ID (AAID)Android IDDevice ID / IMEISubscriber ID (IMSI)SIM serialHardware MAC address
Where it can go
Third parties present (10)
Google AdMobBraze (Appboy)Datadog RUMGoogle Analytics for FirebaseGoogle Firebase AnalyticsGoogle Tag ManagerMeta / Facebook SDKSegmentAdjustAppsFlyer
  • Approximate location, Precise location requested while 3 ad/attribution SDK(s) are present (Google AdMob, Adjust, AppsFlyer) — location commonly feeds ad targeting.
  • Persistent-identifier APIs referenced in code (Advertising ID (AAID), Android ID, Device ID / IMEI +3 more) with 10 analytics/ad SDK(s) present — the mechanism used for cross-app profiling.
  • Camera, Contacts, Microphone, 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: declared vs observed (Play label vs our analysis)

Declared collected
App activityApp info and performanceDevice or other IDsFiles and docsPersonal infoPhotos and videos
Declared shared
App activityApp info and performanceDevice or other IDsFiles and docsPersonal infoPhotos and videos
We observe the app can access
ContactsLocation
⚠ Possible Data Safety mismatch. Label omits 2 categories the app can access: Contacts, Location.

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

Advertising
Google AdMob
Analytics
Braze (Appboy)Datadog RUMGoogle Analytics for FirebaseGoogle Firebase AnalyticsGoogle Tag ManagerMeta / Facebook SDKSegment
Attribution
AdjustAppsFlyer
Consent
IAB TCF
Crash reporting
Google Crashlytics

Build & components

Scanned build 3.86.0. Store metadata may describe a newer release.

APK SHA-2569438fea80dc7981784fe06c7fc148f2178e53070025b6c4050a960b4743f2e25

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

Signer
Joist Inc. self-signed
Scheme
V3V2
Key
RSA 2048-bit
Algorithm
sha1WithRSA
Validity
2014-03-24 → 2114-02-28
Cert SHA-256
1a:5e:f6:91:c5:71:0c:9f:88:ff:2d:e0:55:88:a4:88:97:78:b0:6b:bc:a1:ec:72:55:db:06:af:43:c5:68:a2

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

143 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:activity1.12.4None recorded
androidx.activity:activity-compose1.12.4None recorded
androidx.activity:activity-ktx1.12.4None recorded
androidx.annotation:annotation-experimental1.5.1None 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:browser1.10.0None recorded
androidx.camera.featurecombinationquery:featurecombinationquery1.5.0None recorded
androidx.camera:camera-camera21.5.0None recorded
androidx.camera:camera-core1.5.0None recorded
androidx.camera:camera-lifecycle1.5.0None recorded
androidx.camera:camera-video1.5.0None recorded
androidx.camera:camera-view1.5.0None recorded
androidx.cardview:cardview1.0.0None recorded
androidx.compose.animation:animation1.11.1None recorded
androidx.compose.animation:animation-core1.11.1None recorded
androidx.compose.foundation:foundation1.11.1None recorded
androidx.compose.foundation:foundation-layout1.11.1None recorded
androidx.compose.material3.adaptive:adaptive1.2.0None recorded
androidx.compose.material3:material31.4.0None recorded
androidx.compose.material:material1.10.4None recorded
androidx.compose.material:material-icons-core1.7.8None recorded
androidx.compose.material:material-icons-extended1.7.8None recorded
androidx.compose.material:material-ripple1.10.4None recorded
androidx.compose.runtime:runtime1.11.1None recorded
androidx.compose.runtime:runtime-annotation1.11.1None recorded
androidx.compose.runtime:runtime-retain1.11.1None recorded
androidx.compose.runtime:runtime-saveable1.11.1None recorded
androidx.compose.ui:ui1.11.1None recorded
androidx.compose.ui:ui-geometry1.11.1None recorded
androidx.compose.ui:ui-graphics1.11.1None recorded
androidx.compose.ui:ui-text1.11.1None recorded
androidx.compose.ui:ui-text-google-fonts1.11.1None recorded
androidx.compose.ui:ui-tooling-preview1.11.1None recorded
androidx.compose.ui:ui-unit1.11.1None recorded
androidx.compose.ui:ui-util1.11.1None recorded
androidx.constraintlayout:constraintlayout2.2.1None recorded
androidx.constraintlayout:constraintlayout-compose1.1.0None 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:customview1.1.0None recorded
androidx.customview:customview-poolingcontainer1.0.0None recorded
androidx.databinding:viewbinding9.2.0None recorded
androidx.datastore:datastore1.2.1None recorded
androidx.datastore:datastore-core1.2.1None recorded
androidx.datastore:datastore-preferences1.2.1None recorded
androidx.datastore:datastore-preferences-core1.2.1None 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:exifinterface1.4.2None recorded
androidx.fragment:fragment1.8.9None recorded
androidx.fragment:fragment-compose1.8.9None recorded
androidx.fragment:fragment-ktx1.8.9None recorded
androidx.graphics:graphics-path1.0.1None recorded
androidx.graphics:graphics-shapes1.0.1None recorded
androidx.hilt:hilt-lifecycle-viewmodel1.3.0None recorded
androidx.hilt:hilt-lifecycle-viewmodel-compose1.3.0None recorded
androidx.hilt:hilt-navigation-compose1.3.0None recorded
androidx.hilt:hilt-work1.3.0None 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-livedata2.10.0None recorded
androidx.lifecycle:lifecycle-livedata-core2.10.0None recorded
androidx.lifecycle:lifecycle-livedata-core-ktx2.10.0None recorded
androidx.lifecycle:lifecycle-livedata-ktx2.10.0None recorded
androidx.lifecycle:lifecycle-process2.10.0None recorded
androidx.lifecycle:lifecycle-runtime2.10.0None recorded
androidx.lifecycle:lifecycle-runtime-compose2.10.0None recorded
androidx.lifecycle:lifecycle-runtime-ktx2.10.0None recorded
androidx.lifecycle:lifecycle-service2.10.0None recorded
androidx.lifecycle:lifecycle-viewmodel2.10.0None recorded
androidx.lifecycle:lifecycle-viewmodel-compose2.10.0None recorded
androidx.lifecycle:lifecycle-viewmodel-ktx2.10.0None recorded
androidx.lifecycle:lifecycle-viewmodel-savedstate2.10.0None recorded
androidx.loader:loader1.1.0None recorded
androidx.localbroadcastmanager:localbroadcastmanager1.0.0None recorded
androidx.media:media1.0.0None recorded
androidx.metrics:metrics-performance1.0.0-beta01None recorded
androidx.navigation:navigation-common2.9.8None recorded
androidx.navigation:navigation-compose2.9.8None recorded
androidx.navigation:navigation-fragment2.9.8None recorded
androidx.navigation:navigation-runtime2.9.8None recorded
androidx.navigationevent:navigationevent1.0.2None recorded
androidx.navigationevent:navigationevent-compose1.0.2None recorded
androidx.paging:paging-common3.4.2None recorded
androidx.paging:paging-compose3.4.2None recorded
androidx.paging:paging-runtime3.4.2None recorded
androidx.paging:paging-runtime-ktx3.4.2None recorded
androidx.paging:paging-rxjava23.4.2None 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:recyclerview1.4.0None recorded
androidx.room:room-ktx2.8.4None recorded
androidx.room:room-paging2.8.4None recorded
androidx.room:room-runtime2.8.4None recorded
androidx.savedstate:savedstate1.4.0None recorded
androidx.savedstate:savedstate-compose1.4.0None recorded
androidx.savedstate:savedstate-ktx1.4.0None recorded
androidx.security:security-crypto1.0.0None recorded
androidx.slidingpanelayout:slidingpanelayout1.2.0None recorded
androidx.sqlite:sqlite2.6.2None recorded
androidx.sqlite:sqlite-framework2.6.2None recorded
androidx.startup:startup-runtime1.1.1None recorded
androidx.swiperefreshlayout:swiperefreshlayout1.2.0None recorded
androidx.tracing:tracing1.2.0None recorded
androidx.tracing:tracing-ktx1.2.0None recorded
androidx.transition:transition1.6.0None recorded
androidx.vectordrawable:vectordrawable1.1.0None recorded
androidx.vectordrawable:vectordrawable-animated1.1.0None recorded
androidx.versionedparcelable:versionedparcelable1.1.1None recorded
androidx.viewpager2:viewpager21.1.0None recorded
androidx.viewpager:viewpager1.0.0None recorded
androidx.webkit:webkit1.16.0None recorded
androidx.window:window1.5.0None recorded
androidx.window:window-core1.5.0None recorded
androidx.work:work-runtime2.11.2None recorded
androidx.work:work-runtime-ktx2.11.2None recorded
com.google.android.material:material1.13.0None recorded
com.google.dagger:dagger2.58None recorded
com.google.dagger:dagger-lint-aar2.58None recorded
com.google.dagger:hilt-android2.58None recorded
com.google.dagger:hilt-core2.58None recorded
com.squareup.okhttp3:okhttp4.12.0None recorded
kotlinx:coroutines_android1.10.2None recorded
kotlinx:coroutines_core1.10.2None recorded
kotlinx:coroutines_play_services1.10.2None recorded
kotlinx:coroutines_reactive1.10.2None recorded
kotlinx:coroutines_rx21.10.2None recorded
org.jetbrains.compose.ui:ui-backhandler1.9.0-beta03None recorded
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About this app · store information

About this app

Create estimates, invoices & get paid faster—built for contractors

Content ratingEveryone
Download size203.5 MB
Privacy policyPublished →
Developer sitewww.joist.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
2026-09-29 09:43 UTC3.86.076B
2026-09-03 08:57 UTC3.82.140D

View changes between the last two scans →

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Coverage & gap matrix · Verify signed evidence

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