
CronMaster
Cron Tester & Next-Run Preview
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Free
In-App Purchases
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About
CronMaster is a local-only cron toolkit for developers and ops.
Write or paste an expression, read it in plain English, and see the next run times instantly — before you ship it to production.
WHAT YOU GET
• Multi-engine support: Linux crontab, Quartz, Spring @Scheduled, Kubernetes CronJob, AWS EventBridge, Jenkins, GitHub Actions
• Natural-language description of any expression
• Next / previous run previews with timezone control
• Visual builder for 5-field engines
• Template library (CI/CD, backups, reports, and more)
• History, folders, notes, and Home Screen widget
• Offline — no account, no cloud sync
FREE
• Linux editor, descriptions, next runs, 5 history items, read-only templates
PRO (one-time unlock)
• All engines + cross-engine conversion
• Unlimited history, folders, notes & stars
• Editable templates, batch check, import/export
• Enhanced preview & text share pack
Privacy-first: your expressions stay on your device.
Privacy Policy: https://hairuizhi-cn.github.io/cronmaster-privacy/
Terms of Use: https://hairuizhi-cn.github.io/cronmaster-privacy/terms.html
Questions? Contact us at 1095288658@qq.com
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What's New in CronMaster
1.0.3
November 2, 2026
• Fixed an issue that could prevent cron reminders from running beyond the first three scheduled times. • Improved notification permission handling and made reminder updates more reliable when editing, deleting, or importing schedules. • Significantly faster handling of impossible dates, including February 29, 30, and 31. • Improved backup reliability and purchase error handling.
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Subscriptions & In-App Purchases
$1.99
CronMaster Pro
Unlock all engines, builder & batch check





