gommzystudio/device-activity-tracker
A phone number can reveal whether a device is active, in standby or offline (and more). This PoC demonstrates how delivery receipts + RTT timing leak sensitive device-activity patterns. (WhatsApp / Signal) observed · 2026-08-28
Health v2 · maintenance only
43/100
- Activity 60
- Release rhythm 35
- Longevity 19
Flags: no_releases no_license
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 269
- days_rel: n/a
- days_push: 245
- n_releases_24m: 0
Adoption not part of the score
5098 stars · 697 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
A proof-of-concept application that tracks device activity of phone numbers on WhatsApp and Signal by measuring round-trip times of silent delivery receipts. It demonstrates a privacy vulnerability from academic research, exposing whether a device is active, in standby, or offline, and ships with a React web UI, Node.js backend, and CLI.
Use cases
- track whether a phone number's device is active or in standby
- demonstrate WhatsApp delivery receipt privacy vulnerability
- reproduce the Careless Whisper research paper findings
- measure RTT of message delivery receipts on Signal and WhatsApp
- study device activity patterns via mobile data vs WiFi timing
- security research on mobile messenger surveillance
When to choose
- you are a security researcher or educator demonstrating messenger privacy flaws
- you want to reproduce the Careless Whisper paper's RTT-based tracking technique
- you need a working PoC with web UI and CLI for WhatsApp/Signal receipt timing
When to avoid
- you need a production monitoring or analytics tool
- you intend to surveil people without consent - this is unethical and likely illegal
- you need a hardened, licensed, supported product (license is non-standard and it is a PoC)
Facets
application · maturity active
security privacy monitoring http-client cli developer-tools security privacy messaging-platforms developer-tools cli cross-platform whatsapp signal rtt-analysis delivery-receipts surveillance-research proof-of-concept baileys vulnerability-research react-frontend nodejs web-server docker
1 source
- readme: https://github.com/gommzystudio/device-activity-tracker · fetched 2026-08-28 · d3ff5083bf7e
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| gommzystudio/device-activity-tracker | main | 43 |
For agents
markdown · JSON · MCP: product_card(name="gommzystudio/device-activity-tracker")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem