01
Market intelligence
ProfitSearcher
Find products worth understanding.
A research workspace for discovering profitable software products, examining market signals, and turning scattered evidence into clearer product decisions.
View product ↗
Independent software studio · Shanghai
Useful software,made with attention.
YunFanLabs builds focused tools for people who study, make, explore, decide, and occasionally play on a very small screen.
↓24public products4product platforms2complete languages
01 / Our operating idea
Make the useful thing clearer, calmer, and easier to keep.
We choose narrow problems with real repeat use. Each product should explain itself, respect the person using it, and remain useful when the network disappears.
02 / Selected products
A cross-section of research, reference, planning, and Apple Watch products.
02
Pilot reference & study
FAR/AIM Pilot Pro
The pilot reference desk that flies offline.
Search FAA-sourced FAR/AIM material, ACS tasks, glossary entries, NTSB Part 830 references, and your own study notes—without an account or cloud service.
View product ↗
03
Game planning toolbox
Victoria 3 Toolbox
See the economy before you build it.
An unofficial offline manual and economy planning toolbox for Victoria 3 players, with original guides, reference data, and practical planning tools.
View product ↗
04
Apple Watch companion
WatchCat Step Pet
A warmer reason to walk today.
Move a little, earn cat food, feed your cat, and watch its mood change. WatchCat turns daily steps into a small emotional loop on your wrist.
View product ↗
05
Offline nature atlas
Fish Identifier Offline
Six hundred species. Zero signal required.
An offline fish atlas covering 600 species across 163 families, with localized names, morphology, habitat, distribution, photo assistance, and private observation notes.
View product ↗
03 / Product catalog
Everything currently public.
24 products across the web, iPhone, iPad, and Apple Watch. Each has its own stable page, support route, and privacy context.
ResearchProfitSearcher
Find products worth understanding.
Aviation referenceFAR/AIM Pilot Pro
The pilot reference desk that flies offline.
Games utilityVictoria 3 Toolbox
See the economy before you build it.
LifestyleWatchCat Step Pet
A warmer reason to walk today.
Nature referenceFish Identifier Offline
Six hundred species. Zero signal required.
Health informationAQI to Cigarettes Calculator
Turn an AQI reading into a decision.
Nature referenceWild Edibles Guide Offline
A careful field guide, even off-grid.
EducationUS Constitution Pro
America’s founding document, built for study.
Law & referenceFRE Rules: Evidence Law
The Federal Rules of Evidence, ready when the work is.
UtilitiesKnitKit: Row Counter
Keep the row. Keep the rhythm.
Law & referenceFRAP Rules & Procedure
FRAP, ready when the work is.
ReferenceData Cheese
Turn scattered practice into a daily study loop.
Nature referenceWild Vegetables Guide
A pocket atlas for learning—not guessing.
Nature referenceInsect Guide: Offline ID
Identify, compare, and record—on device.
Nature referenceMineralGuide: Gems & Rocks
A field reference for what the rock might be.
Law & referenceFRBP Rules: Bankruptcy Proc
FRBP, ready when the work is.
ReferenceConstitution of India Offline
India’s constitutional text, ready offline.
GamesSurvivorForWatch
One wrist. One run. One more wave.
Law & referenceFRCP Rules
FRCP, ready when the work is.
Nature referenceBird Guide – Offline Guide
Eight hundred sixty-eight species, wherever you wander.
ReferenceAustralian Constitution
Read the Commonwealth Constitution with context.
UtilitiesWorkshop Calc
Fast estimates for work that still gets verified.
Law & referenceFRCrP Rules: Criminal Proc
FRCrP, ready when the work is.
UtilitiesNoise Detective Pro Home
Turn an annoying sound into a clearer record.
04 / About the lab
Small by design. Broad in curiosity.
YunFanLabs is an independent product studio. We work across reference, education, professional utilities, market research, and compact native experiences—shipping complete products instead of demos.
How we work ↗