We built an uncomplicated calendar tool for low-fidelity planning

Details

External ID

46276456

Source

HN

Company

—

Product

We built an uncomplicated calendar tool for low-fidelity planning

Website domain

letswalnut.com

Launched

Dec. 15, 2025

Cohort

—

Upvotes

5

Upvotes percentile

0.10400763358778627

Tags

—

Fetched at

Sept. 7, 2026, 9:25 p.m.

Updated at

Sept. 7, 2026, 9:25 p.m.

Description

My partner and I do a lot of planning around things like holidays and trips, which involves a mix of firm, tentative, and overlapping plans, and normal calendars are the wrong fidelity for that kind of planning. We often found ourselves drawing on top of screenshots of calendars with tools like Miro or even printing out calendars we could draw on.We're both product designers, and so we're used to working in low fidelity tools like Excalidraw and FigJam. We decided to try and make a low-fidelity equivalent for calendars, and built Walnut. It's just lines and stickies, with a few different styles, no events or times.Walnut has two versions: the super simple, localstorage-based version at letswalnut.com, which you can just pop open any time. There's also a "workspace" version which lets multiple people work on the same calendars with multiplayer collaboration, and persists the calendars long-term.It's still rough around the edges and needs more design refinement, but we've been using it extensively personally (and my team's using it at my work for planning purposes). It's not right for everyone, but for those who like to plan this way, we think it's helpful. Curious to hear any thoughts!Right now anyone can use the localstorage-based version. If you'd be interested in trying out the persisted/collaborative version, drop your email in the waitlist[1] and I'll send you an invite to sign up![1] https://docs.google.com/forms/d/e/1FAIpQLSetOC_hY54_DBfnPCmW...

• Source listing
• Website