Natural Cycles (com.naturalcycles.cordova): Privacy & Security Findings

report - rfi-irfos
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Permanent Disclosure Ledger

The discipline, demonstrated

On behalf of our research partners, we investigate publicly distributed Android and iOS apps: we decompile them, follow their code and data flows, and trace every connection to the servers it reaches. Hundreds of agents work through each app and join the technical evidence into one picture, which our specialists then review and verify.

387+
Android/iOS apps audited
Every app is decompiled at source-code level, not just scanned from outside.
1.04M+
Smali classes read
The full shipped code we have actually read, not an estimate.
262+
Critical findings recorded
Confirmed findings copied to regulators, not theoretical risks.
970+
Weak points found
Third-party tracking we have provably found inside the binary.
567+
Endpoints investigated
Real servers and countries where data actually flows.
132+
SDK instances mapped
Reusable libraries correlated across the entire corpus.
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Showing the report for Natural Cycles.
OrganisationNotifiedStatusSevIntel (click to expand)StatutesResolvedDisclosureElapsedReport
Natural Cycles
NASDAQ
2026-06-22
89d ago
Waiting
Critical
Natural Cycles is certified as a medical device precisely because fertility, ovulation and sexual-activity data is considered sensitive enough to need medical-grade oversight, yet the app still runs an advertising SDK and reads Google's advertising identifier, the same tracking used by ordinary shopping apps. Data serious enough to require medical device certification is flowing through the same commercial ad-tracking channels as any other product.
com.naturalcycles.cordova. FDA-cleared, EU MDR Class IIb-certified contraceptive medical device carrying an advertising SDK (Adjust) and the Google Advertising ID
click to expand
GDPR Art. 9(1)GDPR Art. 5(1)(b)GDPR Art. 5(1)(c)
Yes
Closed
Disclosure
89d 00h 00m 00s
Published
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This ledger is updated in real time as companies respond. Silence is public. Severity is scored primarily by CVSS v4.0, we reserve the right to deviate based on blast radius.