apps.linlifeng.net

Apps &
Experiments

Things I built — from polished apps living in the real world to half-baked ideas worth keeping alive.

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Applications

06

📲 Installable apps can be added to your phone's home screen and launch full-screen, like a native app. iOS: Share → Add to Home Screen. Android: menu (⋮) → Add to Home screen.

Professional The one tied to my actual day job

Computational oligonucleotide design — primers, probes, and assays evaluated and optimized for your experiment in seconds.

Everyday & Community Built because I wanted to use them myself, then let other people in

Live 📲 Installable

A day, through a lens. Cinematic photo journaling — each entry becomes a visual story set to the texture and light of its moment.

Built with: Google Drive API · D1 lake sync · localStorage

Now Let Us Pray

A living wall of candles — prayers, wishes, and hopes lit anonymously by strangers from around the world.

Built with: Cloudflare Worker · D1

Family A household system, and three tools for raising a kid

Live 📲 Installable

Household Organizer

Household clarity. Track items, routines, and spaces so your home practically runs itself.

Live 📲 Installable

Family Coordination

Real-time family hub synced to your Google Drive — calendars, tasks, and decisions all in one quiet place.

Live 📲 Installable

Kids · Quests · Money

Lawrence's quest board and money lab — earn coins, level up, learn to invest, and track allowance all in one place.

Kids · Chinese Learning

Chinese character flashcards built around jokes and game references — learning a character is the last piece needed to get the punchline.

Play No purpose except being fun to build and fun to use

Chroma — mixing paint on a palette to match a reference color

Color Mixing Game

Dip a brush, mix pigments on a virtual palette, and match the reference color — level by level, from first strokes to full mastery.

Blobby — a Tamagotchi-style virtual pet hatching from an egg

Hatch and raise Blobby — a Tamagotchi-style creature that gets hungry, grows, and evolves with the care you give it.

Say What?! — the game's title screen with New Game, Family Deck, and How to Play

Family Party Word Game

Mad-Gab-style card night, digitized — pass the iPad, read the phonetic phrase out loud before the timer runs out. Add your own inside jokes to the Family Deck.

Faceted — a generated cubist portrait from a text seed

Turn any seed into a cubist portrait, Mondrian grid, Rothko field, or Bauhaus composition — export as SVG or PNG.

Deduction Game · Phase One

The Parish of Nether Marling

Michaelmas 1879, ten years before the Index. A sergeant who does not know the parish cannot read a statement until he knows whose it is. Put every soul under the roof they live beneath — each name belongs to one household and one only, and when you are done one name will be left standing under no roof at all.

The Hollowmere Index — a deduction game showing the ledger, a police document and a notebook side by side

Deduction Game · Chapter I

The Hollowmere Index

A blackmailer’s ledger names no one — every debtor is a phrase. Put a name, a place and an end to nine of them. Get three right together and they seal themselves; no submit button, no scolding.

The Correspondent’s Book — a deduction game showing the ledger, a burnt memorandum book and a notebook side by side

Deduction Game · Chapter II

The Correspondent’s Book

Ten years on, the nephew keeps his uncle’s habit: no names, only phrases. Thirty-two papers, nine more identities, and one of them is the name he answers to now.

The Hollowmere Inheritance — a Victorian murder-mystery case file title page

Original Mystery Case

The Hollowmere Inheritance

A self-contained Victorian murder case — ten evidence exhibits and one fair-play solution. Read the clues, name the culprit, then break the wax seal.

Tools Scrapers and quick lookups — built to answer one question, not to be lived in

Puzzle & escape-room games from itch.io and Steam, ranked by a Bayesian-adjusted rating with a boost for favorite authors.

3D Print Discovery

Search & filter 3D printable models for the Bambu Lab A1 mini, checked against your actual filament stash and its 180mm plate.

Quick stock quote lookup.

Ring Size Finder

Size a ring you already own — type in a measurement, or measure it right on your screen against a credit card. US/UK/EU/JP conversions, no upload.

Extensions

10

Chrome extensions — small tools built for daily use, released on the Chrome Web Store.

Journal, todo, and calendar — your new tab, redesigned. 40+ active users.

My Custom New Tab

Minimalist new tab with clock, focus mode, and to-do list.

A simple daily journal extension with dashboard view.

Instantly analyze oligonucleotide sequences — Tm, GC content, and secondary structure from any page.

Highlight Collector

Highlight and save text snippets from any webpage.

Transforms Wikipedia into a beautiful encyclopedia layout.

AES encrypt and decrypt text, with right-click integration.

Reminds you to take breaks while working at your computer.

Timebox Organizer

Personal task management dashboard with timeboxing.

Daily Cryptogram

A new cryptogram puzzle to solve every day.

Lab

19

Experiments, concepts, and things that might become something. Some are working prototypes; others are just sketches worth keeping alive.

Browser-based escape room with puzzle mechanics

Falling-blocks arcade prototype

Dynamic word-frequency visualization

Words arranged in a hypnotic spiral form

Animated data as floating bubbles

Slide Transition

Cinematic image-comparison slider

Transparent Text

Typography as a window into imagery

Encryptor — Web

Browser version of the Encryptor extension — AES encrypt/decrypt text, no install required

Image Processor

In-browser image effects and filters

Minimal nutrition tracking interface

Browser extension dev playground