Pacing Guard: Interval Timer

Pacing Guard helps people with ME/CFS, Long COVID, fibromyalgia, and chronic fatigue follow structured activity-rest routines - without watching the clock.

Voice cues, haptic feedback, with optional support of a Bluetooth heart rate strap tell you when to go and when to rest. You focus on living. The app keeps the rest.


TIMER
• Customizable GO and REST intervals (5 to 120 seconds)
• Voice announcements at each phase transition
• Countdown alerts in the final 5 seconds before switching
• Haptic feedback and sound cues at phase changes
• Smooth visual progress ring with phase colour coding
• Works in the background with screen off

HEART RATE MONITORING
• Connects to any Bluetooth heart rate strap (Polar, Garmin, Wahoo, and others)
• Aerobic threshold calculator to find your personal safe HR limit
• Voice and haptic alerts when approaching or exceeding your limit
• Configurable repeat alerts so you stay informed without being overwhelmed
• Periodic heart rate announcements at configurable intervals
• Time above HR limit tracked for every session, even with alerts muted

SLEEP MONITORING
• Long-press Start for overnight heart rate tracking
• No voice cues, no alerts - continuous silent recording
• Session max HR saved to history

SESSION INSIGHTS
• Live stats during any session - tap the live stats button
• Post-session HR chart with exceedance breakdown
• 8-week trend analysis with sparkline charts
• Monthly pacing calendar showing your compliance at a glance
• Export session data as CSV
• Save sessions to Apple Health as workouts

PRIVATE & OFFLINE
• No accounts, no ads, no tracking
• No subscriptions or hidden costs
• All data stays on your device
• Works fully offline

ACCESSIBLE
• Full VoiceOver support with descriptive labels
• Dynamic Type for all text sizes
• Respects Reduce Motion preference
• Minimum 44pt tap targets
• High Contrast mode compatible
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Disclaimer: Pacing Guard is a general-purpose interval timer and self-management aid. It is not a medical device and does not provide medical advice, diagnosis, treatment, or disease prevention. The app does not make any claims about health outcomes. Heart rate monitoring is provided for informational purposes only. Any routines followed using this app are self-directed and used at your own discretion. Always seek advice from a qualified healthcare professional regarding any medical condition.