Undertone vs sukuji

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Undertone compared with sukuji
Detail	Undertone	sukuji
What it does	See why colors work	Free App Store Screenshot Generator
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	JP
Pricing model	Freemium	Freemium
Pricing	Free: Original view, Temperature map, Value structure, Saturation map, Palette and Harmony for every image, 20 analyses at a time. Lifetime Premium: one-time purchase includes Composition guides, Contrast map, tinted value bands, unlimited history, full-res export. No subscription.	Free tier includes one set of 5 screenshots with watermark (3 ready to use) in English or Japanese. Paid packs: 10 generations for $9 one-time, or 50 generations for $29 one-time. Both paid packs include multiple languages, iPad and iPhone Duo sizes, 7 shots per set, and no watermark.
Key features	Palette with proportions showing dominant colors sized by image weight Color harmony identification (Complementary, Analogous, Triadic, Split-complementary, Tetradic, Square, Monochromatic) Temperature map showing warm and cool distribution across image Value structure divided into clear zones (light, mid-tone, dark) Saturation map showing vivid and muted areas Composition guides identifying classic guides like golden ratio and rule of thirds Contrast map showing where the eye lands first (Premium) Painter-friendly color names (Yellow Ochre, Payne's Gray, etc.) Local device processing with no image uploads Works offline with no account required	Automatic headline generation Supports multiple languages iPhone, iPad and iPhone Duo support No watermark on paid plans App Store Connect ready Upload up to 3 screenshots Generates 5 screenshots per set
What makes it different	Shows color proportions, not just colors, recognizing that a 60/5 split is fundamentally different from 50/50 Four layers of analysis together show relationships single layers cannot reveal Built by people who actually mix paint with painter-friendly vocabulary Lifetime Premium with single payment, no subscription model All data stays on device, no account signup required	Headlines are drawn by code so text never breaks across lines Free with no sign-up required Completes in 1-2 minutes per set One-time purchases instead of subscriptions
Community votes	0	0
DR (Domain Rating by Ahrefs)	8 +1 (up) since last check	1 no change since last check
Trust Flow (Majestic)	4	3
Citation Flow (Majestic)	32	19
Referring domains (Majestic)	31	5

5 details filled in for both companies.

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