ThermoTimer
Sauna & Cold Plunge Timer
The perfect companion for your thermal therapy sessions. Guided protocols for sauna and cold plunge with phase timing, session tracking, and Apple Watch support.
Free
Sauna & Cold Plunge Timer
The perfect companion for your thermal therapy sessions. Guided protocols for sauna and cold plunge with phase timing, session tracking, and Apple Watch support.
Free
First post-launch fix release. Focused on the Live Activity feature, error handling, and code hygiene.
The Lock Screen and Dynamic Island timer display, advertised since launch, was silently broken because the wrong widget was registered. The real Live Activity now shows the active phase, remaining time, and round count on the Lock Screen and Dynamic Island as designed.
Resolved a timing race where the Lock Screen activity could show stale data for the first 1–2 seconds of a new session. Updates now appear immediately when the session begins.
Replaced silent error swallowing in the session-history and settings save paths with explicit error handling. Any future save failure will now surface in logs instead of dropping data quietly.
The Apple Watch companion no longer displays nonsensical negative time strings if the sync from iPhone lags slightly past zero. The watch face clamps to 0:00 in that edge case.
Added the App Store privacy manifest, declared the encryption-compliance answer, hardened the paywall navigation flow against iOS 17+ nested-navigation issues, and removed a duplicate Watch source folder that was a latent build-failure risk.
Heat exposure for relaxation and recovery
Cold immersion for alertness and resilience
Recovery time between phases
Gentle introduction to thermal therapy
Short cold, longer sauna exposure
Traditional long sauna sessions
Balanced hot and cold exposure
Short session for busy days
Emphasis on cold exposure
Control your sessions directly from your wrist. Perfect for when your phone is in a locker.
Track all your sessions with detailed stats. See time spent in hot and cold phases.
Build consistency with streak tracking. Stay motivated with your progress.
Sauna Glow for warm ambiance, Dark Minimal for OLED, Light Clean for outdoors.
Low brightness mode keeps the timer visible in dark sauna environments.
Customizable alerts for phase transitions. Never miss a change.
Create your own therapy sequences with custom durations and phases.
Share your session history. Track your thermal therapy journey.
No accounts, no ads, no subscriptions. Works everywhere.
iOS 17.0+
iPadOS 17.0+
watchOS 11.0+
Cooking timers + meat thermometer
USDA-recommended internal temperatures are built in: poultry 165°F, ground meat 160°F, beef/lamb steaks 145°F + 3-min rest, pork 145°F + 3-min rest, fish 145°F. ThermoTimer's preset timers count up to those targets.
Not yet. Current version is a manual entry + reference + cooking timer combo. Bluetooth probe support is roadmapped for a Pro update.
Check Settings → Notifications → ThermoTimer → Allow. The alarm uses a local notification scheduled for the timer's end. iOS Focus mode may suppress the visible alert but the sound still plays.
ThermoTimer follows your iOS region by default. Override per-recipe in the recipe detail view.
Download ThermoTimer free. No subscriptions, no ads.