Cron Timer Designer

Cron Timer Designer is a desktop schedule builder, trigger timeline simulator, and
systemd unit generator for Linux developers and system administrators.
Build 5-field cron expressions and presets interactively, verify plain-English
schedule meanings in real time, preview the exact next 25 execution timestamps on
a 24-hour density heatmap, and export production-ready crontab entries alongside
matching systemd .service and .timer unit files.

Key Features:
- Interactive 5-Field Cron & Systemd OnCalendar Builder: Visual minute, hour,
day-of-month, month, and weekday pickers synchronized with raw expression input,
standard macros (@hourly, @daily, every 15 min, weekdays 9 AM), plain-English
translation, systemd OnCalendar conversion, and syntax error diagnostics.
- Next 25 Trigger Simulator & 24-Hour Density Grid: Pure-Python schedule matcher
computing the exact next 25 trigger timestamps in local and UTC time alongside
a custom 24-hour x 7-day execution density heatmap.
- Crontab & Systemd Unit Exporter: Generates ready-to-deploy crontab entries,
matching .service and .timer systemd unit files with Persistent and
RandomizedDelaySec options, plus CSV next-25 schedule export.

Disclaimer: Cron Timer Designer is an independent open-source project by TC Studio and is not affiliated with, endorsed by, or sponsored by Crontab.guru.