Liquid Lab
Draw finger-paths to stream colored liquids into matching test tubes before they overflow.
Drag a continuous stream of liquid with one finger; route each color to its flask and chain combos when vessels fill simultaneously.
One-thumb drag — trace a path, lift to cut off the stream, tap flask to seal a full tube.
Magical potion-pouring tied to Magic Sort's liquid-coloring craze, but you literally draw the flow.
Magic Sort sits #4 top free in the US with 543K ratings — water/color sort is white-hot, yet the draw-the-path variant is barely explored on mobile charts.
Water/liquid sort is a top-chart proven hook — Magic Sort! sits #3 Top Free iPhone Puzzle in the US with ~4M downloads and ~$6M monthly revenue per Sensor Tower; draw-the-path layer adds a tactile novelty.Sensor Tower: Magic Sort! #3 Top Free iPhone Puzzle, 4M downloads / $6M revenue last month ↗Magic Sort! ranks #1 in water sorting puzzles with 4.7★ across 480K ratings ↗
Pouring/streaming water is a proven viral theme — Water Pouring Challenge content has amassed millions of views across TikTok, Snapchat and Facebook, giving the visual hook organic shareability, though the specific draw-path mechanic hasn't been independently validated as viral yet.'EPIC Water Pouring Challenge' trending viral video ↗Snapchat topic page aggregating millions of Water Pouring Game clips ↗
One-finger drag-to-pour and tap-to-seal are trivially understood inputs, but the continuous-stream/overflow-failure loop adds more state to manage than a tap-pour sort, so build is simple but not trivial.
Category leader Magic Sort! ranks #17 Top Grossing iPhone Puzzle with ~$6M/month revenue, confirming rewarded video + interstitials work well for the genre; no draw-path specific ad-format data yet.Magic Sort! #17 Top Grossing iPhone Puzzle, ~$6M monthly revenue ↗
Category is heavily saturated — 247+ water-sorting puzzle apps tracked, and IEC Global's Water Sort Puzzle alone has 100M+ Google Play downloads; the draw-the-path variant returned no clear chart-topping hit, leaving the niche unproven rather than wide-open.247+ apps tracked in the water sorting puzzle category ↗Water Sort Puzzle by IEC Global Pty Ltd — 100M+ downloads ↗