Oh Dear (https://ohdear.app/features/scheduled-task-monitoring https://ohdear.app/features/scheduled-task-monitoring) has Cron job monitoring and application he

Oh Dear (https://ohdear.app/features/scheduled-task-monitoring https://ohdear.app/features/scheduled-task-monitoring) has Cron job monitoring and application health monitoring for apps that can send alerts to most platforms, including Slack and webhooks. What made you build your own over going with one of the established players?