Software crafted with precision.
Engineered for privacy.
At Skysail Software, we engineer fast, native utilities designed to run locally, respect battery life, and protect your personal data by never collecting it in the first place.
StoryTime
Sleep Audio Pauser for Android
Love falling asleep to audiobooks or podcasts, but hate waking up hours ahead having lost your place? StoryTime combines on-device machine learning with wearable heart rate telemetry to detect sleep onset in real-time and gently pause your playback.
Built for Performance, Not Data Harvesting
We believe the best software does its job quietly, efficiently, and leaves your private data completely in your control.
Zero Telemetry by Default
We operate no telemetry ingestion servers, analytics SDKs, or behavioral trackers. Data is processed strictly in volatile RAM on your own device and discarded immediately after use.
Local-First Sensor Fusion
Rather than waiting hours for third-party cloud aggregators to sync sleep records, our high-efficiency Go decision engine evaluates multi-sensor signals right as they occur.
Native Battery Efficiency
Engineered with modern Android Foreground Services, low-power Bluetooth LE GATT profiles, and optimized wake-lock routines that won't drain your phone overnight.
The StoryTime Sensor Fusion Engine
How StoryTime accurately determines when you fall asleep without false positives.
Google Sleep API
Emits on-device ML sleep confidence events based on device stillness, ambient light, and circadian patterns.
BLE Heart Rate Stream
Reads pulse intervals from Whoop, Fitbit, or smart band to detect natural 8–15% resting heart-rate dips.
Go Core Decision Engine
Applies exponential moving average baselines and hysteresis confirmation windows to prevent premature pause triggers.
Gentle Audio Fade & Pause
Lowers active stream volume over 30 seconds, then dispatches transient audio focus and hardware pause keyevents.