QuakeInfo, a long-standing earthquake monitoring app on the App Store, has been updated with a Liquid Glass interface and enhanced real-time data processing, offering users in seismic zones a faster, more intuitive way to track ongoing tremors as of April 2026. Developed by independent developer Marco Ruiz, the app aggregates data from the USGS, EMSC, and Japan Meteorological Agency to deliver push alerts within 15 seconds of detected quakes above magnitude 4.0, leveraging background location services and low-power sensor fusion on iOS devices. What sets QuakeInfo apart in a crowded field of disaster apps is its commitment to minimal latency and offline functionality—critical advantages when cellular networks fail during major seismic events.
This week’s update introduces a Liquid Glass design language, a visual framework first popularized in visionOS that uses frosted glass effects, depth layering, and subtle motion to convey data hierarchy without visual clutter. Ruiz implemented it using SwiftUI’s new Material API and custom shader modifiers, reducing UI rendering load by an estimated 22% on iPhone 15 Pro models compared to the previous UIKit-based interface, according to internal benchmarks shared with Archyde. The app now prioritizes epicenter proximity, depth, and PGA (Peak Ground Acceleration) over raw magnitude alone—metrics that better correlate with structural damage risk, a shift informed by collaboration with UC Berkeley’s Seismology Lab.
How QuakeInfo Achieves Sub-20-Second Alert Latency Without Draining Batteries
Most earthquake apps rely on polling public APIs every 30–60 seconds, a strategy that balances freshness with battery cost. QuakeInfo instead uses a hybrid push-pull model: it maintains a persistent, low-bandwidth WebSocket connection to Ruiz’s private relay server, which subscribes to USGS’s Earthquake Notification Service (ENS) via webhook. When ENS fires, the relay pushes a compressed protobuf packet (< 500 bytes) directly to the app, bypassing Apple’s APNs throttling for non-critical alerts. This allows QuakeInfo to trigger a local notification within 8–18 seconds of the USGS issuing an alert—well before most competitors.
To preserve battery life, the app leverages iOS’s Background Tasks framework with a 300-second minimum interval for location updates, but only activates high-accuracy GPS when motion sensors detect sustained movement (>0.5g for 3+ seconds), a pattern indicative of human activity during or after shaking. Ruiz confirmed that in standby mode, QuakeInfo consumes an average of 0.8% battery per hour on iPhone 14, verified via Instruments profiling during a 72-hour test period. “We’re not trying to replace dedicated early warning systems like ShakeAlert,” Ruiz said in a recent interview. “We’re giving people a reliable, privacy-first way to know what’s happening *right now*—especially when official alerts are delayed or inaccessible.”
“What Marco’s done with QuakeInfo is quietly impressive—he’s built a real-time geospatial alert system that respects iOS’s background execution limits even as outperforming many government-adjacent apps in speed. It’s a masterclass in constrained optimization.”
Escaping the Platform Trap: Why QuakeInfo Avoids iOS Lock-In Through Open Data Pipelines
Unlike many wellness or safety apps that trap user data in proprietary clouds, QuakeInfo stores no personal information beyond anonymized, ephemeral location hashes used solely for proximity-based alert filtering. All seismic data is sourced from public APIs, and the app’s core logic is available for audit via a public GitHub repository (github.com/maruruiz/QuakeInfo-core), though the UI remains closed source. Ruiz emphasizes that the app does not use Firebase, AWS Amplify, or any third-party analytics SDKs—eliminating risks of data leakage or unexpected cost spikes from cloud providers.
This approach positions QuakeInfo as a counterpoint to the growing trend of “sensor aggregator” apps that harvest behavioral data under the guise of public safety. By avoiding location history storage and refusing to sell aggregate usage patterns to data brokers—a practice Ruiz explicitly forbids in the app’s privacy policy—QuakeInfo aligns more closely with the ethos of open-source disaster tools like QuakeFeed and the EU-funded EMPLINA project, which prioritize interoperability and data sovereignty.
Still, the app remains dependent on Apple’s ecosystem for distribution and background execution privileges—a point of tension Ruiz acknowledges. “I’ve explored Android and web versions,” he said, “but iOS’s background location accuracy and consistent sensor access make it the only viable platform for the latency we need. Until Android stabilizes its background location exemptions for safety apps, we’re iOS-first by necessity, not dogma.”
“QuakeInfo proves that you don’t need a venture-backed startup or a Fortune 500 partnership to build life-relevant software. Sometimes, one developer with a deep understanding of both seismology and iOS constraints can move faster than the incumbents.”
Where QuakeInfo Fits in the Evolving Landscape of Citizen Seismology
The app’s update arrives amid growing interest in distributed sensing networks—from MyShake’s smartphone accelerometer array to Raspberry Pi-based seismometers in schools. While QuakeInfo doesn’t contribute sensor data back to research networks (it’s purely a consumer alert tool), its popularity highlights a demand for accessible, low-friction interfaces to official seismic data. In regions like California, Japan, and Turkey, where public alert systems suffer from fragmentation or delayed rollout, apps like QuakeInfo fill a critical gap in the warning timeline.
From a technical standpoint, QuakeInfo’s use of protocol buffers for data transmission, combined with Swift concurrency actors for thread-safe UI updates, reflects a maturing indie development ethos that prioritizes efficiency and correctness over rapid iteration. The app’s binary size remains under 8MB, and it supports iOS 15.0+, ensuring broad device compatibility without forcing users into constant upgrade cycles—a stark contrast to the bloatware tendencies of many “super apps” in the safety category.
As climate-driven disasters increase in frequency and intensity, tools like QuakeInfo remind us that resilience isn’t always about building bigger systems—sometimes, it’s about refining the ones we already have. For users in earthquake-prone areas, the latest version isn’t just a visual refresh; it’s a quieter, more reliable way to stay informed when the ground starts to move.
