Liquid Color Puzzle

Pour glowing liquid between glass tubes until every colour stands alone. The rule takes ten seconds to learn; the campaign has ten thousand solvable levels across six difficulty tiers and a hundred themed regions, with frozen, capped and webbed tubes and geysers changing the rules as it climbs.

Seven tools for the hard ones, a daily challenge with streaks, stars and gold, unlockable themes — and no account, no timer, and play offline.

What it does

• 10,000 campaign levels, every one solvable
• Six difficulty tiers, from Easy to Nightmare
• Daily challenge with streak rewards
• Offline, no account, on iPhone and iPad

Privacy and terms are on the app's own site.