Guides
Short, practical walkthroughs of the parts worth learning once. Every screenshot is the app as it runs today — no mockups.
Install Just Percent on your phone (and laptop)
Add Just Percent to your iPhone, Android or laptop home screen — own icon, full screen, works offline. Two minutes, no app store.
Read the guide →Find the right calculator in seconds
Search the way you speak, star what you use, and read the worked solution under every result. Three habits, three minutes.
Read the guide →Being written next
Planned after launch — shorter than the ones above, just as practical.
Percent change vs percentage points
Why a rise from 10% to 12% is two percentage points yet a 20% increase — and when each number is the honest one.
Discount stacking at the till
“Extra 20% off already reduced prices” — what the till will actually charge, and how to check it before you queue.
Working offline, end to end
What keeps working with no connection, what needs one, and how the app updates itself when you come back online.