Pulse Rhythm Sync

* This application is a manual HIIT timer and heartbeat zone reference tool.

*It does not automate fitness tracking or provide medical advice.

* Manual input for HIIT work and rest durations in seconds

* Manual setting for total number of workout rounds

* Round-based countdown timer with visual progress indicator

* Color-coded phase labeling for work and rest states

* Start and pause controls for session timing management

* Automatic round progression after each work-rest cycle

* Age-based maximum heart rate estimation using arithmetic formula

* Manual age input for real-time recalculation of training zones

* Tabular display of five heart rate zones from recovery to peak

* Manual text entry for logging and recovery observations

* Timestamped list view of logged recovery notes

* Feature for clearing all logged entries from the device

* Dashboard navigation via grid-based feature access

* Fully offline operation with no data transmission or cloud sync

* Interactive screen for information and privacy disclosures

* Splash screen with application branding