penX vs Palettra
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
penX
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PenX手写笔，结合APP信号调节，您可以在ipad上感受到真实的笔触，更好的解决断触，延迟等现象，实现书写的自然感受，为您提供更流畅灵敏的体验。开机搜索连接蓝牙后，可切换到功能设置界面，实现20多个快捷设置功能（包括电源键开关机，加减音量，播放上下曲，拍照，快速截屏，智能关机）等功能，给您带来更高效的进行记录，学习和使用
Palettra
This tool helps researchers, students, and designers recolor scientific figures and images. It offers professional and adaptive color palettes, allowing you to remap chart colors and export high-quality images for various professional uses.
- Professional color palettes
- Adaptive palette generation
- Image and PDF import
- Chart color remapping
- High-quality image export (PNG, JPEG, TIFF, PDF)
- Cross-platform access
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Palettra is a scientific figure and image recoloring tool for researchers, students, designers, and creators. Import images or PDFs, preview professional color palettes suitable for papers, presentations, and reports, remap chart foreground colors, and export processed images for reports, course materials, presentation slides, and manuscript preparation. Key features: • Professional palettes A curated collection of scientific, design, journal-style, and open-source chart palettes helps make figures clearer and more visually consistent. • Adaptive palettes Generate adaptive palettes locally on your device based on imported images or reference images, ideal for extracting color inspiration from an existing visual style. • High-quality export Export as PNG, JPEG, TIFF, or PDF, with original, 300 ppi, or 600 ppi resolution options for papers, presentations, course materials, and design drafts. • Cross-platform access One subscription works across iOS and macOS, allowing you to use Palettra Pro features on both mobile and desktop. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: penX at none against Palettra's 3. penX also leads on iOS requirement (12.0 vs 18.0). Palettra's advantage is update cadence (every 4 days vs every 6 weeks). 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. Palettra sells 3 in-app purchases, starting at $1.99 per month. penX asks for nothing beyond the download.
penX ships an update every 6 weeks, Palettra every 4 days. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.
| Parameter | penX | Palettra |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 6 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 33 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Xinyun Zhilian Technology Co., Ltd | 新焰 陈 |
In-app purchases
penX
No in-app purchases
Palettra
- Palettra Pro Monthly$1.991 Month
- Palettra Pro Yearly$9.991 Year
- Palettra Pro Lifetime$14.99
