Comparison

Paintsight vs Undertone

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Paintsight

This app helps artists analyze and draw from reference photos. It offers tools for value studies, color analysis, composition guides, and proportional drawing grids. Users can also compare their work directly against references.

Highlights
  • Notan and value studies
  • Color palette analysis
  • Drawing grids and guides
  • Painting comparison tools
  • Reference photo organization
  • iPad-optimized interface
Features
Read full description

Paint from photos with a painter's eye. Paintsight keeps your reference photos in one place and gives you the studio tools to read them: notan and value studies, grids, color palettes, design tools, and a way to check your painting against the reference. SEE THE VALUES • Notan and value study: simplify any photo into 2 to 7 values, then tap a value to highlight it • Notan options: several ways to design the lights and darks, side by side • Thumbnail: see the design at postage-stamp size, where only the big shapes count • Squint and grayscale views, to judge light and dark without detail or color in the way • Sample: tap any spot to read its value on a 0 to 10 scale, its color and whether it reads warm or cool READ THE COLOR • Palette: the main color masses with their share of the picture, value, hex and RGB. Tap one to see everywhere it appears • Color blocks: flat color masses for the block-in • Warm and cool map, and a chroma map of where the most intense color sits • Gamut wheel: the palette on a color wheel, with its color scheme named SEE THE DESIGN • Planes: the photo as flat facets, finer where the form turns • Silhouette: check that the subject reads as a single shape • Focal point, big lines and flow: where the eye goes first, the main directions, and the direction of form for planning brushstrokes • Hard and soft edges: see how sharply shapes meet • Contours: clean lines for drawing in or transferring DRAW IT IN PROPORTION • Drawing grid with numbered and lettered squares, sized to your canvas (such as 16x20 in) so you can scale up square by square • Rule of thirds, golden section, diagonals and harmonic armature guides • Measure angles and proportions, with a plumb line • Sketch over a reference with Apple Pencil. The sketch is saved with the photo • Mirror, rotate, and crop to your canvas shape or a standard ratio CHECK YOUR PAINTING • Photograph your painting, straighten it, and compare it with the reference: overlaid, flicking between the two, or side by side • Compare in any view, such as values or color blocks, to see where the painting has drifted KEEP YOUR REFERENCES ORGANIZED • Import from the camera or your photo library, one at a time or in bulk • Tag photos, such as hands, skies, fabric or portraits, and filter in a tap • Add notes to each reference: palette ideas, mixes, what to try next time • Syncs with iCloud, so the same library is on your iPhone and iPad BUILT FOR iPAD • Library sidebar, and tool options in a side panel so the photo stays full size • Open a reference in its own window beside your painting app in Split View or Stage Manager • Drag a reference straight into Procreate, Files or another app • Keyboard shortcuts for the main tools MADE FOR PAINTERS For oil, acrylic, watercolor, gouache and plein air painters, and for anyone drawing from reference. Plan a painting at the kitchen table, then prop your iPad or iPhone by the easel while you work. The screen stays awake while a reference is open. SIMPLE PRICING Try Paintsight free with up to 3 reference photos and every tool. One payment unlocks unlimited photos for life. No subscription, no account, no ads. Questions or ideas? Get in touch from Settings. Paintsight is made by an independent developer.

About

Undertone

Analyze images like a painter by visualizing values, color temperatures, and composition. Understand the underlying structure and pigment colors of any reference photo or artwork. Save your analyses for future reference.

Highlights
  • Value study (grayscale tonal zones)
  • Warm/cool temperature map
  • Composition analysis (rule of thirds, golden ratio)
  • Real pigment color palette
  • Saturation visualization
  • Contrast mapping
Features
Read full description

See any image the way a painter does. Bring in a reference photo, a master painting or a screenshot. In seconds, Undertone shows what sits underneath it: the values, the warm and cool, the composition and the real pigment colors. The things a painter checks before the first brushstroke, made visible. All processing happens on your device. Your images never leave it. Value study. The image stripped to grayscale and divided into clear tonal zones. Two values give you a notan, three give you light, middle and dark. Value does more work than color: a painting with strong values and wrong colors still reads. This automates the painter's squint. Composition. The structure under the image, from the rule of thirds and the golden ratio to triangles, leading lines, symmetry and framing. Ten types, and Undertone only shows the ones the image actually follows, each with how closely it matches. Premium. Warm and cool. A temperature map over the image. Muddy shadows? Probably warm paint leaking into your cools. Golden hour? Warm light forces cool shadows by contrast. Toggle the map on, and what you couldn't diagnose becomes obvious. Palette with real pigment names. Dominant colors shown by actual weight, each matched to the closest real pigment. Yellow Ochre, not "Autumn Sunset Dream." Undertone names the closest harmony and plots the colors on a wheel so you see the geometry. Saturation. Vivid areas glow, muted areas recede. See whether the intensity sits where you want the eye to go. Contrast. Where the eye lands first. Rings mark the strongest areas. Premium. Made for painters and artists: studying a master painting, planning a piece from a reference photo, or finding out why the shadows went muddy. Photographers use it to understand why a light works so they can find it again. Every analysis is saved, and over time your history becomes your own color reference. Free: 20 analyses at a time with the Original, Temperature, Values and Saturation modes, plus the palette and harmony for every image. Premium: Composition (10 guide types), Contrast, tinted value bands, the 2-value notan and 2 to 9 tonal steps, unlimited history, higher-resolution export. One-time purchase. No subscription. Stop guessing. Start seeing.

Screenshots

Paintsight4 screens
Undertone4 screens

Verdict

The call

The clearest difference is rating: Undertone at 5.0 against Paintsight's 3.0. Undertone also leads on device support (4 vs 2) and iOS requirement (15.0 vs 26.0). Paintsight's advantage is monetization model (free vs free with in-app purchases). On price, ratings volume, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Paintsight sells 1 one-off in-app purchase and Undertone sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Undertone holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

UpkeepUpdate frequency

Paintsight ships an update every 2 weeks, Undertone every 10 days. The most recent releases landed on November 4, 2026 and November 8, 2026 respectively.

Scorecard4 real differences · 6 level
Paintsight versus Undertone: the parameters behind the verdict, then further details
ParameterPaintsightUndertone
PriceFreeFree
Rating3.0 (2 ratings)5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings2 — better1
Update frequencyEvery 2 weeksEvery 10 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod, Mac — better
Requires iOS26.015.0 — better
Further details — not scored
Size8 MB33 MB
Age rating4+4+
DeveloperGruffydd JohnstonPaintingstack Technologies SpA

Customer experience

Paintsight

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

Undertone

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Paintsight

One-time1
  • Lifetime$4.99
1 purchases

Undertone

One-time1
  • Lifetime Premium$12.99

Questions

Is Paintsight free?
Paintsight is free to download, with in-app purchases available.
Is Undertone free?
Undertone is free to download, with in-app purchases available.
Which has better reviews, Paintsight or Undertone?
Undertone is rated higher. Paintsight averages 3.0 out of 5 from 2 ratings, while Undertone averages 5.0 from 1 ratings.
Do Paintsight or Undertone have ads?
Neither Paintsight nor Undertone shows ads.
Which is updated more often, Paintsight or Undertone?
Paintsight ships an update every 2 weeks, and Undertone every 10 days. Most recently, Paintsight was updated on November 4, 2026 and Undertone on November 8, 2026.

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