Can I trust Calm - Sleep, Meditate, Relax?
This app did not meet two or more trust checks, has a critical issue in one, or has a red flag.
- What it means for you
- The build includes code to send usage patterns and behavioral events to Firebase Analytics, Amplitude, Segment, AppsFlyer, and Facebook. The content of mood entries, journals, and sleep records is not passed to those services. Some stored user data may not be fully protected.
- Main concern
- Mental health journals and session tokens stored unencrypted, accessible via ADB backup
- The developer's description
- Calm is the #1 app for sleep, meditation, and relaxation. Find anxiety relief, stress relief, and better sleep through breathing exercises, sleep sounds, deep sleep music, and mindfulness programs for insomnia, beginner meditation, and beyond.
- Third-party services
- 19
- Findings rated low or higher
- 13
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Full findings
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Trust checks
Secure by Design
One criterion not metSecurity gaps detected
Why this result
This check looks for security issues at high severity or above in the code of this build, and at least one was recorded. Issues of this kind include a credential or token another app on the device can reach, sensitive data stored without protection, and network paths that expose information in transit.
Account credentials are stored unencrypted on the device. A separate cryptographic weakness also affects the encrypted storage path on a subset of devices.
Data Minimization
One criterion not metTracking lacks clear disclosure
Why this result
This build contains analytics or attribution code written to send data to companies other than the developer. No consent step was found before that code runs, and the app's disclosures do not describe the collection in full. Tracking by itself is ordinary; what this check reports is the combination of collection, recipient and absent disclosure.
This build contains code for this item; what that code does at run time was not observed.
Manifest Mismatch
One criterion not metDisclosure incomplete or contradicted
Why this result
The check compares the app's privacy disclosures against what the code does, and at least one claim did not match in this build. Mismatches of this kind include a data category collected but not disclosed, a recipient the disclosure omits, and an identifier attached to data the disclosure describes as anonymous.
A behavioral data collection service appears to be undisclosed in the app's privacy communications, and a setting that appears to disable another data collection service is silently overridden in code so that service continues operating.
User Control
StrongNo lock-in
Why this result
The check looks for a way to export the data an account has accumulated and a way to delete the account itself. In this build, either both were found, or the app has no account of its own and keeps its data on the device. For an app without an account, the developer has no server-side copy to export or delete, and deleting the app removes the data in its own storage.
No artificial barriers to leaving the service, proprietary data formats that would trap user content, or obstacles to account deletion were identified in the code analysis.
Truly Local
StrongStays on the device
Why this result
This app presents itself as working offline or on the device alone. The check looks for any code written to send personal data to a server, including analytics, crash reporting and advertising code. None was recorded in this build.
Analysis confirmed that the actual content of mental health journals, mood check-ins, and sleep records is not transmitted to third-party analytics or advertising services. These sensitive records flow only to the app's own servers. The build includes code to pass only standard behavioral metadata, such as which features were used and session timing, to third-party services, not the underlying health content.
Strengths
- SSL errors correctly rejected across all WebViews — connections fail safely on certificate issues
- File system access disabled in all WebViews, preventing local file exfiltration via web content
- All production API traffic uses HTTPS with OS-level cleartext blocking enforced
- Token-bearing WebViews (WebviewActivity, WebSubscriptionActivity) are not externally accessible — URLs cannot be injected from other apps
- HIPAA enrolled users have analytics properly anonymized: AppsFlyer anonymized, Facebook placed under Limited Data Use, all partner events filtered
- Facebook automatic event logging and advertiser ID collection disabled at manifest level by default
- Health Connect integration is write-only and opt-in — the app does not read health data from other apps or sources
- Mood, journal, and sleep content values are not passed to third-party analytics — behavioral events only, not the actual data entered by users
What the app contains
19 services
Third-party services the scan names in the build:
- Firebase Crashlytics
- Firebase Performance
- Firebase Cloud Messaging
- Firebase Remote Config
- Firebase Analytics
- Google Play Billing
- Google Pay/Wallet
- Google Health Connect
- Google Sign-In
- Auth0
- Amplitude Analytics
- Amplitude Experiment
- Segment Analytics
- AppsFlyer
- Iterable
- PerimeterX (HUMAN Security)
- Facebook SDK
- Stripe
- Wear OS
Libraries
| Library | Version | Advisory |
|---|---|---|
| ExoPlayer / media3 | not recorded | none confirmed |
| Room | not recorded | none confirmed |
| Lottie | not recorded | none confirmed |
| Amplitude | not recorded | none confirmed |
| Google Play Billing | not recorded | none confirmed |
| AppsFlyer | not recorded | none confirmed |
| Auth0 | not recorded | none confirmed |
| Facebook SDK | 16.2.0 | none confirmed |
| Glide | not recorded | none confirmed |
| Datatransport | not recorded | none confirmed |
Show all 38 librariesShow fewer
Changes since the previous scan
- Version 6.92 (build 4120434), score 70.
- Score 68 before, 70 after.
- Version 6.87 (Build 4120426) before, 6.92 (build 4120434) after.
- Score change since version 6.87 (Build 4120426): +2 points.
- Since the previous scan: 22 findings added, 11 removed.
- Version 6.87 (Build 4120426), score 68.
- Score 22 before, 68 after.
- Version 6.87 (Build 4120426), score 22.
- First public scan of this app.
Method and limits
Static analysis: the decompiled code, manifest and resources of this build, read file by file. Network traffic at run time is established by a capture of the running app.
- Files decompiled
- 47,375
- Scan date
- 30 July 2026
Corrections
No correction is published for this app.
Developer response
No response is published for this app.
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