Hear First.
Move Fast.

SplitSec turns supported smartphones into distributed, on-device gunshot-awareness points for communities and organizations, without installing a fixed acoustic sensor network.

Download SplitSec for Android →For organizations: book a walkthrough

Privacy by architecture: raw microphone audio used for detection or false-positive feedback is not transmitted to SplitSec. You must be 18+ to register for or use the app.

Raw audio stays on-deviceFor detection and false-positive feedback, SplitSec receives no raw microphone recording.

On-device detectionCore acoustic analysis runs locally

No fixed acoustic gridDeploy with supported smartphones

Pilot-first validationMeasure before scaling

No raw-audio feedback uploadOptional feedback uses a derived sound signature

How it works

Fast awareness from phones already in the field.

Each participating phone analyzes sound locally. When connected features are available, matching detections can support corroboration and alert delivery.

SplitSec detect corroborate notify workflow

Coordinated acoustic grid

Participating phones work together inside the active footprint to create broader awareness without installing fixed acoustic sensors.

Multi-device corroboration

Matching detections can increase confidence and help reduce some false alerts when enough participating phones are nearby.

Infrastructure free

Deploy in minutes using smartphones. No permanent wiring, fixed acoustic sensors, or camera network required.

More details →

Performance & validation

Built to be measured, not just marketed.

For a safety product, “accuracy” without definitions, sample size, device context, and ground truth is not enough. SplitSec pilots are intended to measure both performance and failure modes.

False positivesL1 and corroborated L2 behavior

CoverageParticipation density and armed time

Device effectsPhone, OS, microphone, and battery behavior

Alert latencyDetection-to-awareness timing

See Performance & Validation →

Transparency standard

Detection, user feedback, corroboration, and independent verification are not the same thing.

A user response can help evaluate the system, but it does not by itself prove that gunfire occurred or establish the source. Performance claims should include the measurement method and limitations.

See definitions and known limits →

Live

Press coverage

Recent coverage of SplitSec's Chicago community pilots and smartphone-based approach.

NBC Chicago · Aug 13

Potential ShotSpotter replacement could rely on cellphones

A Chicago-area program is testing mobile phones as a flexible gunshot-awareness layer.

Watch coverage →

FOX 32 Chicago · Aug 14

Chicago startup SplitSec uses your phone to detect gunshots

Founder and CEO Sri Deivasigamani discusses how the system works and why it was developed.

Watch interview →

Block Club Chicago · Aug 13

Gunshot detection app tested in 2 Chicago wards

Community pilots test smartphone-based detection in real neighborhood settings.

Read article →

SplitSec PerimeterPAK portable deployment kit

Pilot same day with SplitSec PerimeterPAK™

Portable gunshot awareness in minutes.

Preconfigured phones in a rugged case for temporary, outdoor, or mobile footprints. Hand out devices, power on, and start on-device detection.

✓
Ready to use
Phones, labels, quick-start materials, and deployment guidance.
✓
Deploy anywhere
Events, patrol routes, lots, parks, and temporary sites.
✓
No permanent install
No wiring, poles, fixed acoustic hardware, or camera network.

Pilot PerimeterPAK →

Solutions

Built for outdoor and mobile footprints.

Coverage depends on participating device density, environment, device behavior, and configuration. Start with a defined pilot footprint and scale based on measured results.