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 — its 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: Percent change vs. percentage points · Discount stacking at the register · Working offline, end to end.