What is Heftle?
Heftle is a free daily logic puzzle you play in your browser. Every item weighs a different whole number
from 1 to N, and a few balance scales are your only clues: one side is heavier, or both sides balance.
Work out what every item weighs with as few mistakes as you can, then share your result with friends.
Everyone gets the same puzzle each day.
How to play
- Read the scales. A tilted scale means its lower side is heavier; a level scale means both sides weigh the same. Grey blocks weigh exactly what they say.
- Tap an item, then tap its weight to lock it in. A wrong weight counts as a mistake.
- Turn on Notes to cross out weights you have ruled out, with no penalty.
- Lock in every item, then share your score: one square per item, green for no mistakes.
Frequently asked questions
- Is Heftle free?
- Yes. Heftle is free to play in your browser, with no sign-up and no download.
- When does a new puzzle come out?
- Every day at midnight in your own time zone.
- How hard is Heftle?
- Mondays are gentle, with four items. Puzzles get harder through the week, and Sunday's seven-item puzzle is the toughest.
- Do I ever have to guess?
- Never. Every puzzle has exactly one answer, and you can always reach it by logic alone.
- Can I play past puzzles?
- Yes. Every earlier puzzle is in the archive, and you can play them any time.
- Does Heftle work on my phone?
- Yes. It works in any modern phone browser, and you can add it to your home screen like an app.