Overview

I built Cal.build after getting frustrated with planning documents shared as PDFs usually from people outside my daily workflow.
I wanted a minimal way to go from idea -> schedule -> live calendar.

You type what you want to plan, it returns a calendar with a .ics URL you can subscribe to (Google Calendar and others).

Example:“Plan a 5-day team summit in Costa Rica starting May 1st, including team building activities and project planning sessions.”

Returns a full schedule with editable events, a public URL, and live updates.

Features: 1. Text-to-calendar conversion 2. Subscribable .ics link 3. Shareable and auto-updating

Stack: Next.js, Supabase, AI SDK, deployed on Vercel.

Would appreciate feedback.

https://www.cal.build/

Releases

Cal.buildInitial

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Initial release

April 11, 2025

Gonzalo Orsi

wrote:

Initial release of Cal.build.

Author

Gonzalo Orsi

@gonzaloorsi

Stats

1 tool

1karma

Beginner

Joined: March 2025

Pricing

Pricing model

Freemium

Paid options from

$9.99/month

Billing frequency

Monthly

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Thanks for the feedback, and also for the tip for the community. One more tip: if you upload an image directly, you can add context that might be missing in the image. For example, the duration is 3 hours or prefix every event title with Name:

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Average from 6 ratings.

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Comments(1)

J.I.

🙏 121 karma

Nov 4, 2025

@ initial release

Rated it

@Cal.build

This has quickly become one of my favourite tools. It makes planning and scheduling so much easier. Also made a video about it https://youtu.be/Uf2ydOjlo2Y

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Pros and Cons

Pros

Customized calendar creation

Broad application range

Streamlined planning process

Automates planning tasks

Integrated workout schedule planning

Integrated diet schedule planning

Integrated study planning

Direct help for travel planning

Project timeline organization

Learning paths organization

Continuous learning mechanism

User schedule adaptation

Prioritizes personalization

Maintains user-friendly interface

Prioritizes data security

Robust privacy policy

Efficient time management

Aids in fitness tracking

Facilitates diet planning

Supports study planning

Simplifies travel planning

Enhances project management

Develops learning paths

Secures user data

View 19 more pros

Cons

Lacks multi-platform support

No API integration

Limited to calendar functions

Lacks third-party app integration

No real-time collaboration feature

Lacks version tracking

No mass data import/export

No offline functionality

Limited customization options

No multilingual support

View 5 more cons

Q&A

How does cal.build use AI to create custom calendars?

cal.build utilises artificial intelligence to create customised calendars. This cutting-edge solution leverages automation to streamline the process of calendar creation, effectively adapting and learning from the user's schedule over time to offer a personalized experience.

What types of schedules can I create with cal.build?

With cal.build, you can create a variety of schedules including workouts, diet plans, study regimes, travel plans, project timelines, and learning paths.

Can cal.build help me plan my workouts and diet?

Yes, cal.build certainly can aid in planning your workout and diet schedules, utilizing its AI abilities to create personalised and efficient plans based on your individual needs.

How can cal.build assist in scheduling study regimes or learning paths?

cal.build can be effectively used to schedule study regimes or learning paths. Its AI system learns and adapts to your unique schedule, enabling the creation of personalized and optimal study and learning schedules.

Is cal.build suitable for managing project timelines?

cal.build is entirely suitable for managing project timelines. It uses artificial intelligence to streamline the process of project scheduling, helping you maintain an organised, efficient, and updated project roadmap.

Does cal.build adapt to changes in my schedule over time?

Yes, cal.build is built to adapt to changes in your schedule over time. Its AI intuitively learns from your routines and preferences, and modifies your calendars to accommodate these changes to offer a truly personalised planning tool.

+ Show 14 more

How user-friendly is the cal.build interface?

The cal.build interface is extremely user-friendly. It was designed with a focus on efficiency and simplicity, providing a less cumbersome and more streamlined approach to scheduling and planning.

Can I use cal.build to plan travel itineraries?

Yes, you can use cal.build to plan travel itineraries. It simplifies the daunting task of travel planning, leveraging AI to create customised travel plans based on your specific needs and schedule.

How does cal.build ensure the security of my data?

cal.build ensures the security of your data with a robust privacy policy and terms and conditions. Upholding user data security is one of the tool's core features, and it has explicit measures in place to ensure this.

What is the privacy policy of cal.build?

cal.build has a dedicated privacy policy page where it describes its practices regarding data collection, storage, and usage. This highlights cal.build's commitment to respecting and protecting user privacy.

Can I customise my calendars on cal.build?

Yes, you can customize your calendars on cal.build. The tool leverages AI to provide a personalized and unique calendar experience, allowing for extensive customization based on your individual needs and schedule.

How does cal.build streamline the process of calendar making?

cal.build streamlines the process of calendar making by utilizing artificial intelligence. This AI-driven approach automates the process, thereby making it less cumbersome and more efficient.

How efficient is time management with cal.build?

Time management with cal.build is highly efficient. The tool utilises AI's potential to create customised calendars that enhance planning and scheduling, offering a practical solution for effective and personalised time management.

What aspects of my life can cal.build assist with?

cal.build assists with various aspects of your life including workout planning, diet scheduling, study regimes, travel plans, project timelines, and setting up learning paths. It’s a comprehensive AI-powered tool designed to streamline and optimize life’s numerous tasks.

Does cal.build have a terms and conditions page?

Yes, cal.build does have a terms and conditions page. By referring to this page, users can understand the terms of use and policies related to the tool's functionality and user data management.

How does cal.build prioritize personalization?

cal.build prioritizes personalization by continuously learning and adapting to each user's schedule. Utilising artificial intelligence to its full potential, it personalizes calendar creation catering to each individual's unique planning needs.

Can cal.build suggest fitness tracking or diet planning schedules?

Yes, cal.build can suggest fitness tracking and diet planning schedules. It leverages the power of AI to understand your preferences and creates a personalized approach to fitness and diet planning.

Can I trust cal.build with my personal and professional information?

Yes, you can definitely trust cal.build with your personal and professional information. With a strong commitment to data security, it provides robust privacy policy and terms and conditions that serve to safeguard user information.

How does cal.build compare to traditional methods of calendar making?

Compared to traditional methods of calendar making, cal.build leverages AI to provide a more efficient and personalised tool. It automates and streamlines the process, enabling a very user-friendly experience while simultaneously maintaining an exceptional level of customization and personalization.

Is cal.build a pioneer in AI-powered calendar creation?

Yes, cal.build is indeed a pioneer in AI-powered calendar creation. It specifically emphasises AI and personalization to offer a unique, efficient, and user-centered means of creating customised calendars.

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Cal.build

Overview