What is the best alternative to Jelly Field - Color Merge on iPhone?

Play Colors, A tier, #2 in color merging.

Is there a free alternative to Jelly Field - Color Merge?

Yes: Play Colors (A tier, #2) is free to download, with in-app purchases.

No. Jelly Field - Color Merge is #1 in color merging.

Jelly Field - Color Merge is S tier, #1 of the 6 tiered apps in color merging. Here is everything that competes with it on iPhone, in tier order.

2
Play ColorsA
Free + IAP · ★ 4.5 · 10,826 ratings · score 83
A color mixing puzzle game, listed under Games, in which the player tries to mix colors correctly.
3
Color Merge PuzzleB
Free + IAP · ★ 4.5 · 5,419 ratings · score 79
A color mixing puzzle where you combine base colors on a canvas to match shades shown at the top of the screen.
4
Color Sort: Stack Sorting GameC
Free + IAP · ★ 4.7 · 2,815 ratings · score 67
A turn-based color stacking game where you place and merge stacks to score points before your opponent.
5
Mix Colors!C
Free download · ★ 4.4 · 27,958 ratings · score 61
A color-mixing puzzle game where you pour liquids to match a given target color.
6
tint.D
n/a · ★ 4.7 · 9,598 ratings · score 58
A puzzle game where you solve levels by mixing and painting watercolors to match the color of origami.

What is the best alternative to Jelly Field - Color Merge on iPhone?: Play Colors, A tier, #2 in color merging.
Is there a free alternative to Jelly Field - Color Merge?: Yes: Play Colors (A tier, #2) is free to download, with in-app purchases.
Does anything rank above Jelly Field - Color Merge?: No. Jelly Field - Color Merge is #1 in color merging.