Deep Timer is designed in a minimalist way. But that doesn't mean we have less features. In fact, it is highly configurable and has many functionalities that improve your meditation practice. This page documents the concrete feature set and technical behavior so you can understand how the app works.
Core Timer Flow
The session runs across three phases:
• Warm Up: optional preparation period before meditation
• Meditation: main countdown for your practice
• Cool Down: optional post-session buffer after finish
Configurable Options
Durations
• Warm Up Duration: seconds (default 30s)
• Meditation Duration: seconds (default 20m)
• Cool Down Duration: seconds (default 2m)
Alarms
You can set different alarm settings for each phase:
• Start Alarm: plays at the end of Warm Up (session begins)
• Finish Alarm: plays at the end of Meditation
• Cool Down Alarm: plays when Cool Down completes
Alarm Options
• Sound: choose from the library below (or "No Sound")
• Count: choose between 1 to 3 rings
• Fade In: when enabled, the ring volume goes up gradually
Technical Behavior
Screen Wake Lock
• The screen is kept awake during the sessions using browser's wake lock technology. By this, the app can reliably play the alarm sounds at the end of the session. Plus, you can always check the timer without reaching out to the device.
Test Alarm Sounds
• By pressing "Test Alarm" button below the timer, it plays a short preview of the alarm sound. This is helpful when you want to adjust the volume to a hearable yet comfortable level.
Persistence
• Settings persist automatically (web: localStorage, mobile: AsyncStorage).
Cross-Platform
• Works on mobile and web. No login. No ads.