Hi r/betatesters!

I’m an independent developer working on Sentry, a privacy-first, 100% offline Android emergency SOS application.

The goal of this project is to turn any spare or primary phone into a standalone safety beacon without requiring 4G/Wi-Fi data, cloud servers, or monthly subscriptions.

I'm looking for beta testers in the US, UK, and Canada to help verify two critical real-world functions:

🧪 What Needs Testing:

1. 🎤 Voice Wake-Word & Regional Accents:
   • Since speech recognition runs 100% locally on the phone's CPU (no cloud/internet used), I need to test how accurately different regional accents (American, British, Canadian) trigger the offline emergency wake-word (e.g., shouting "HELP").
2. 📶 Carrier Calls & GPS SMS Dispatch:
   • Verify that automated distress calls and plain-text SMS messages (containing raw satellite GPS coordinates) execute properly across various telecom carriers (e.g., AT&T, Verizon, T-Mobile, EE, Vodafone, Rogers, Telus, etc.).
3. 📱 Device Compatibility & UI Fit:
   • Ensure screen layout and local background monitoring perform smoothly across various Android devices (flagships, budget models, or rugged/dumbphones).

🛠️ Core Features:

• 🎤 Hands-Free Voice Detection: Detects emergency wake-words offline.
• 📶 Low-Signal SMS Dispatch: Sends raw satellite GPS location via standard text SMS (works even on 1-bar 2G/3G signal).
• 🚨 Sensor Impact Detection: Automated distress trigger if a severe collision is detected.
• 🔒 Zero Subscriptions & Zero Cloud Tracking: No user data leaves your device.

🎁 Tester Reward

To thank you for your time and feedback, every active tester will receive a Free Lifetime Promo Code / Full Access Pass.

🚀 How to Join:

Just leave a quick comment below with:

1. Your Country (US / UK / Canada / Other)
2. Phone Model

I will DM you the testing link and Promo Code directly!

Thank you so much for helping test an independent, zero-subscription safety tool!

Hi everyone,

I’m an independent Android developer. I recently built Sentry with a simple belief: Personal safety shouldn't be hidden behind expensive Big Tech monthly subscriptions or require buying $1,000 flagship phones.

Most corporate safety solutions rely on costly cloud servers, constant data tracking, and recurring fees. My goal is to turn any existing or spare Android phone into a dedicated, 100% offline emergency tool at zero ongoing cost—especially for people hiking in remote areas, living off-grid, or working in places with zero data/2G-only signals.

🚨 Current Testing Challenges & Why I Need Your Help:

Since I am based locally outside North America/Europe, I have a few testing bottlenecks that I cannot solve alone:

1. Voice Wake-Word & Accent Sensitivity: How reliably does the offline wake word trigger? Since offline speech models run locally on the CPU, I need testers with different regional accents (US, UK, Canada, Australia, etc.) to see how accent impacts recognition accuracy.

2. US / UK / Canada Telecom Verification: Testing whether automated emergency SMS alerts (containing satellite GPS coordinates) and call triggers execute properly across different carriers in these regions.

3. Screen Layout Compatibility: Feedback on how the UI scales across different screen sizes, aspect ratios, and Android OS versions.

🛠️ What the App Does:

🎤 Hands-Free Voice Detection: Detects local voice keywords entirely on-device (no Wi-Fi/4G needed).

📶 Built for 2G / Low-Signal Scenarios: Sends plain-text SMS with GPS coordinates even with minimal cell coverage.

🚨 Sensor Detection: Triggers automated distress protocols if an impact or immobilization is detected.

🔒 100% Local & Privacy-First: Zero cloud server tracking, no background data usage, no subscriptions.

🎁 Free Lifetime Access for Testers

To thank you for helping me test and squash bugs, I will give you a lifetime free access code / promo code.

How to join:

Just drop a comment below with your country, phone model, and accent/region (e.g., "US - Pixel 7 - Southern accent" or "UK - Samsung S22"), and I'll DM you the access code and testing instructions!

When testing, I'd love to know:

- How is the wake-word performance/responsiveness on your device?

- Did your accent or background noise affect recognition?

Any feedback on UI fit, carrier behavior, or general suggestions would mean the world to me. Thanks for supporting an indie dev fighting big tech subscriptions!

Solo Developer

Marcus