Discover coldpen.io
coldpen.io is the no-nonsense, affordable cold email platform for founders and indie hackers. Launch campaigns, track results, and grow your business—no bloat, just results.
30-day money back guarantee
Affordable for all teams
Sequences, A/B testing, Universal Inbox
Loved by founders & indie hackers
Everything you need for Twitter success
From AI-generated content to seamless scheduling and analytics, Coldpen Calendar is your growth partner.
AI Content Generation
Share your highlights and let AI craft tweets tailored to your voice and audience.
Smart Scheduling
Schedule tweets at optimal times and manage your content calendar with intelligent suggestions.
Audience Insights
Understand your audience with analytics and tailor your content for maximum engagement.
Performance Tracking
Track tweet performance and optimize your strategy with detailed analytics.
Content Curation
Organize your best ideas with AI-powered suggestions and editing tools.
Google Calendar Sync
Integrate with Google Calendar for reminders and never miss a posting opportunity.
How Coldpen Calendar Works
Get started in minutes. No learning curve, just results.
Connect
Link your Google Calendar account directly.
Create
Describe your idea or highlight, let AI generate tweet drafts.
Schedule
Pick optimal times or let AI suggest the best slots.
Grow
Track performance and refine your strategy with insights.
What Our Users Say
Creators and founders love how Coldpen Calendar transforms their Twitter workflow.
"Coldpen Calendar helped me grow my audience 3x in just two months. The AI tweet generator is a game changer!"
Alex Kim
Indie Hacker
"Scheduling and analytics are so easy. I finally have a content system that works for my busy days."
Priya Shah
Startup Founder
"I love the seamless Google Calendar sync. Never miss a tweet, and my engagement is up 200%."
Jordan Lee
Content Creator