Interval Timer (Python)

What you get

A polished desktop interval timer with a large countdown ring, saved presets, accurate monotonic timing, sound cues and a CSV session log. Pure Python and Tkinter, no third-party dependencies.

Highlights

• Prepare, work, rest and rounds with an optional final rest
• Drift-resistant countdown, pause, skip and fullscreen controls
• Tabata, HIIT, Sprint, EMOM and saved custom presets
• Sound cues, always-on-top mode and keyboard shortcuts
• Session log with CSV export and automatic saved settings
• Python 3 + Tkinter, offline, zero third-party packages

Format & delivery

Delivered as a Python · .zip. The source, README and any included examples are yours to keep and edit.

How to run it

This is a Python bundle. You need Python 3 (free from python.org). External libraries: none — only the Python standard library.

1. Download and unzip the bundle.
2. Open a terminal in the unzipped folder.
3. Run the program:

   python interval-timer/interval_timer.py

The bundle includes a README.md with full options and examples.

Immediately after your Lightning payment settles, the download link appears at checkout. No account, no email, no waiting for a message.

How buying works

Pay from any Lightning-enabled Bitcoin wallet. The checkout creates an invoice for the fixed USD price and unlocks the file when the payment settles. An on-chain fallback is available. If you do not have Bitcoin yet, the no-card guide explains the shortest route.

Category: Fitness Sports · Product ID: interval-timer