Public software lab

Tidemason is my public software lab.

I'm Silas Lee, an indie developer building small apps in public. After building too many products in private, I'm now learning distribution, user validation, and more honest product practice.

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Current Products

The projects I'm still willing to validate.

This is the short list. The newest bet gets the front slot, and the older ones stay only if the problem is still worth testing in public.

Featured NowChrome Extension

Signal Notebook

A local-first workspace for manually saving prospect signals, organizing follow-ups, and keeping outreach prep lightweight.

Live / New

Designed around manual signal capture instead of scraping, automation, or bulk outreach.

Now live in the Chrome Web Store as the newest project in the lab.

Product preview

Signal Notebook preview
iPhone App

OpenGlow

A lightweight beauty and skincare expiry tracker designed around a narrow, everyday use case.

Designed for one narrow daily job instead of a broad beauty workflow.

Best candidate for clearer consumer validation right now.

Live / Validating

Live preview

OpenGlow preview
iPhone App

Kept

A subscription decision app that helps you decide whether something is still worth renewing.

A smaller, opinionated utility around subscription renewal decisions.

Still alive because the core problem is easy to explain and test.

Live / Validating

Live preview

Kept preview

Utility Sites

Useful small websites deserve their own shelf.

Not every public project needs to become an app. Some are better when they solve one narrow problem immediately and get out of the way.

Web Utility

Match Time Calendar

A fast World Cup 2026 local-time converter with downloadable calendar files for people who just want the schedule in their own timezone.

Live

A search-friendly utility site built around one highly specific problem people can solve in seconds.

Different from the app work: less product depth, more direct utility and distribution learning.

Live utility snapshot

World Cup 2026Timezone Converter
Los Angeles 18:00
London 02:00
Beijing 09:00
Tokyo 10:00
Calendar downloadSEO utilityFast local lookup

Project Archive

The failed bets still earn their keep.

I keep the archive visible, but shorter. It should document pattern recognition, not take over the homepage.

csv-debugger

Archived

Incident diagnosis for structurally broken CSV files.

Lesson: Sharper product boundaries tend to outperform broad data-platform ambition.

offlineaudit-csv

Archived

Local-first CSV auditing with reviewable exports and audit trails.

Lesson: Trustworthy workflows still need a much stronger pain signal to survive.

NoticeFlow

Archived

A county foreclosure notice PDF-to-CSV desktop prototype.

Lesson: Template-heavy products slide into service work unless the scope stays brutally narrow.

ReplyCopilot

Archived

A tiny web tool that turned one tweet into three reply options.

Lesson: If general AI already covers the baseline, convenience alone is not enough of a wedge.

audit-csv

Archived

An early offline-first CSV and Parquet audit direction.

Lesson: Dead branches can still be useful roots for better products later.

Writing / Notes

Notes from building too many things in private.

I'm not building a full blog system here. Just enough surface area for public thinking, product notes, and honest postmortems.

About

I'm Silas Lee, an indie developer based in China.

I build small software products, mostly around personal tools, data workflows, and everyday decision-making. Right now I'm more interested in learning distribution than in quietly stacking more private projects.

Current focus

Public validation, honest product practice, and smaller bets with clearer signal.

What this site is

The single public entry point for what is alive, what is archived, and what I learned.

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