Wesper Security & Privacy Scorecard
Android
App activity and crash data are reported to Firebase, Google's analytics and crash-reporting platform. No advertising or behavioral tracking services are present. Sleep data stays within the app's own infrastructure, with only technical diagnostics shared externally.
Best for
Sleep trackers comfortable with crash analytics
Findings
- 0 critical
- 0 high
- 3 medium
- 1 low
- 2 info
6 issues identified across security and privacy analysis.
Top security issues
- Authentication Tokens Stored in Plaintext SharedPreferences
- User Profile Data Stored in Plaintext SharedPreferences
- Authentication Credentials Logged at INFO Level
Top privacy issues
- User Profile Data Stored in Plaintext SharedPreferences
- Session State Stored in Plaintext SharedPreferences
- Authentication Credentials Logged at INFO Level
Full analysis
Wesper
Version: 2.34.0 (Build 198) | Scanned: 2026-03-24
What This Means for You
App activity and crash data are reported to Firebase, Google's analytics and crash-reporting platform. No advertising or behavioral tracking services are present. Sleep data stays within the app's own infrastructure, with only technical diagnostics shared externally.
Recommendation: Trustworthy
Best For: Sleep trackers comfortable with crash analytics
Key Findings
Data Security - 2 findings (1 medium, 1 info)
Network Security - 1 finding (1 info)
Code Safety - 0 findings
Privacy - 2 findings (1 medium, 1 low)
Privacy Concerns
What Data is Collected
Wesper collects app usage activity and crash diagnostics through Firebase. Sleep-related data recorded in the app remains within the app's own systems and is not used for advertising or behavioral profiling.
Third-Party Data Sharing
| Service | Purpose |
|---|---|
| Firebase Crashlytics | Crash and error reporting |
| Firebase Sessions | Session activity analytics |
| Firebase Core | Core analytics infrastructure |
| Firebase Installations | Device installation tracking |
| Retrofit / OkHttp | Networking library (no external data sharing) |
No data is shared with advertising networks or data brokers.
Understanding the Scores
| Category | Score |
|---|---|
| Overall Security | 87/100 |
| Overall Privacy | 90/100 |
| Data Security | 88/100 |
| Network Security | 98/100 |
| Code Safety | 96/100 |
| Data Collection | 97/100 |
| Data Sharing | 100/100 |
| User Control | 97/100 |
Positive Security Features
- No advertising, behavioral tracking, or data broker services are integrated
- Data sharing with outside parties is limited to technical diagnostics only
- Network communications use current, well-maintained libraries
- Sleep and health data is not transmitted to external profiling services
Areas for Improvement
- Some data stored on the device could be better protected against access by other apps or someone with physical access to the device.
- A small number of data handling configurations could be aligned more closely with current security recommendations.
About This Analysis
This scorecard is based on automated static analysis of the app's compiled code and configuration files. Scores reflect the app's security and privacy posture as of the scan date.
App Details
- App Name: Wesper
- Package ID: co.wesper.sleep
- Version: 2.34.0 (Build 198)
- Scan Date: 2026-03-24
Versions & scan history
| Scan | Date | Overall score |
|---|---|---|
| #1 (current) | 88/100 |