chmod vs PaintGenius
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
chmod
This app helps you understand and master the 'chmod' command by easily deciphering octal values. Choose to click individual bits or select octal values to learn file permissions.
- Decipher octal values
- Learn file permissions
- User-friendly interface
- Click individual bits
- Select octal values
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Ever been curios about what those numbers means in a chmod command? Well, wonder no more! Learn and master the art of chmod-fu. With chmod-fu's super easy to use user-interface you can decipher those octal values in a blink of an eye. You choose if you want to click on individual bits, such as read, write, execute, or pick an octal value, both are available to suite your preference.
PaintGenius
This professional tool assists in matching paint colors for general and automotive applications. It calculates precise paint recipes using advanced algorithms and provides a guided verification workflow for accurate results. The app ensures optimal color matching by analyzing source colors and suggesting ideal palettes.
- Advanced recipe calculation (CMY & Kubelka-Munk)
- Iterative optimization for color accuracy
- Intelligent source color analysis and recommendations
- Support for 2-stage and 3-stage automotive paints
- Multi-angle sampling for metallic/pearl paints
- Recipe library with volume calculator
- Step-by-step verification workflow
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PaintGenius is a professional tool for general and automotive paint color matching. It supports source color management, target color setting, recipe calculation, and a comprehensive verification workflow. Key Features: - Advanced Recipe Calculation: Utilizes two distinct algorithms for precision. For general paints, a CMY-based subtractive mixing model is used. For complex automotive finishes, it employs the powerful Kubelka-Munk (K-M) theory, which simulates light absorption and scattering for superior accuracy with multi-layer and effect paints. - Iterative Optimization: A sophisticated iterative algorithm fine-tunes the paint ratios by minimizing the color difference (ΔE2000) between the mix and the target, ensuring the best possible match. - Intelligent Source Analysis: The app analyzes the quality of your source colors, assessing their contribution and effectiveness. When color difference exceeds the threshold (ΔE > 10), it blocks verification and provides smart recommendations for source color replacement. - Ideal Source Recommendation: If a good match is not possible with the current palette, the app leverages LCH color space principles to suggest an ideal set of source colors that will provide maximum mixing coverage around your target. - Advanced Settings: Fine-tune algorithm parameters including color difference thresholds, layer thickness, iteration counts, and step sizes to match your specific needs and expertise level. - General & Automotive Paint Matching: Create recipes for wall paint, furniture paint, and complex automotive paints with intelligent workflow selection. - Advanced Automotive Support: Supports 2-stage (base + clear) and 3-stage (base + effect + clear) systems for metallic and pearl paints, with automatic fallback to simpler systems when source colors are insufficient. - Multi-Angle Sampling: Capture color accurately for metallic/pearl paints at different angles (15°, 45°, 110°) to account for angle-dependent color shifts. - Smart Adjustment Suggestions: Only displays adjustment recommendations when color difference exceeds the threshold (ΔE > 2.0), avoiding unnecessary adjustments for excellent matches. - Recipe Library with Calculator: Save and manage your paint recipes with a built-in volume calculator that lets you scale recipes to any desired total volume. - Step-by-Step Verification: A guided workflow to verify and fine-tune your paint recipes for a perfect match, with automatic quality assessment. - Privacy-Focused: All your data is stored locally on your device. We do not collect any user data.
Screenshots
Verdict
The clearest difference is price: chmod at Free against PaintGenius's $3.99. chmod also leads on iOS requirement (8.2 vs 17.6). PaintGenius's advantage is update cadence (every 5 weeks vs every 5 months). On review sentiment, ads, in-app purchases 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
chmod is free to download; PaintGenius costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
chmod ships an update every 5 months, PaintGenius every 5 weeks. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.
| Parameter | chmod | PaintGenius |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.2 — better | 17.6 |
| Further details — not scored | ||
| Size | 10 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Red Shark AB | 秀银 林 |
Customer experience
chmod
PaintGenius
In-app purchases
chmod
No in-app purchases
PaintGenius
No in-app purchases









