VTimer: Custom Interval Timer

VTimer is a customizable interval timer for routines that need clear, repeated alerts.

You can set the alert interval and alert length separately, making it easy to match the timer to workouts, stretching, breathing exercises, study sessions, and other repeating routines.

Choose whether each cycle should notify you with vibration or sound. In sound mode, you can pick an audio file from your device, preview it, and apply it in a few taps so the timer fits your routine.

On the timer screen, you can check the remaining time, current status, and completed cycle count at a glance. Presets let you apply commonly used interval and alert-length combinations quickly, while simple start, pause, and reset controls keep the experience focused and easy to use.

Even in the background, the app keeps a running status notification so you can keep track of the remaining time, completed cycles, and alert mode.

When the device is locked or the screen turns back on, VTimer tries to continue the remaining alert time so the session stays on track. Actual alert behavior can still vary by device settings and manufacturer policies.

Key benefits
- Set the alert interval and alert length separately
- Choose repeating vibration alerts or sound alerts
- Select, preview, and remove your own alert sound
- Check remaining time, current status, and completed cycles at a glance
- Apply common interval and alert-length combinations quickly with presets
- Personalize the timer look with theme and color options
- Keep track of the running session from background notifications

Features

1. Timer
- Countdown display
- Visual progress ring
- Running, alerting, paused, and idle status display
- Completed cycle count

2. Settings
- Alert interval
- Alert length
- Vibration or sound mode
- Custom sound selection, preview, and removal
- Theme mode and color options

3. Quick Start
- Presets for common interval and alert-length combinations
- Fast setup with a single tap

4. Running Session
- Start, pause, and reset controls
- Background status notification
- Easy visibility into the current timer flow and completed cycles

If you want an interval timer that repeats exactly the way you prefer,
VTimer gives you flexible control without unnecessary complexity.

Recent changes:
This update is a major rebuild with a full migration from native Android to Flutter.