buy advertisement to make it relevant to market. let's name Ad cost
this one I can really promote - all fee tools
pay cpu use of gemini AI, another cost AI cost
now will have adsense banners that is income ad income
then we can think of membershipt that is another incoem membership income
or can have pay per use income payperuse income

Ad cost - i have to work on buying advertisement
AI cost - it's automatic
Ad income - i have to work making banner
membership , payperuse - don't know what to do yet

will have first 1,2,3 solutions to have some kind Profit Loss structure.
Whole process is lind Proof of concept.
We can reduce cost, increas income. imagination is limit

app build

golf swing analysys 
flutter web app -> then mobile. 

income

Banner advertisement - income 
membership,   
pay per use
also can add  
sponsor, contribution , donation, support fund   

expense

gemini use expense
app advertisement cost payperclick

1. if Banner advertisement income > gemini use expense

then I have done !!. 

2. even if not,

this is good portfolio and biz idea later. 
also there is many ways to turn it be profitable.
-- but focus as portfolio at the beginning
- 

광고 붙이고, 1. 어제 video xx x 시간 갔네. 2. 광고 붙일 궁리 하다가 시간 깨짐 day1 POC< day2 HTHL day3 advertisemns, how this made page ( log )

advertisement + material.