Pix8 vs Undertone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pix8
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Improve your artistic learning curve using Pix8. Pix8 allows users to get a close-up view of the individual pixels of a subject. Surprise yourself with the knowledge of what colors are what in the complex world of imagery, what looks white may only be gray compared to a similar looking white in the same image! Pix8 will enable you to enlarge the pixel size, and additionally, lower the number of colors in your image, thus making it easier to paint, or draw. As a bonus, Pix8 allows you to save your pixelated images for use in other apps.
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.
- Value study (grayscale tonal zones)
- Warm/cool temperature map
- Composition analysis (rule of thirds, golden ratio)
- Real pigment color palette
- Saturation visualization
- Contrast mapping
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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
Verdict
The clearest difference is in-app purchases: Pix8 at none against Undertone's 1. Pix8 also leads on iOS requirement (11.4 vs 15.0). Undertone's advantage is update cadence (every 10 days vs every 4 months). On price, ads and device support 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
Both are free to download. Undertone sells 1 one-off in-app purchase. Pix8 asks for nothing beyond the download.
Pix8 ships an update every 4 months, Undertone every 10 days. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.
| Parameter | Pix8 | Undertone |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 11.4 — better | 15.0 |
| Further details — not scored | ||
| Size | 8 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Samuel Hart | Paintingstack Technologies SpA |
In-app purchases
Pix8
No in-app purchases
Undertone
- Lifetime Premium$12.99









