ColPick vs Rub Memo
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ColPick
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Design with Color & Contrast Tired of switching between tools to convert color codes? The Ultimate Color Picker is a powerful, offline, and elegant utility for designers, developers, and artists. Select any hue from the color wheel and fine-tune saturation and brightness with precision. Key Features: Intuitive HSV/HSL Selector: Use the smooth Hue Slider and the detailed Saturation/Value Square for pinpoint color accuracy. 5-in-1 Instant Conversion: Get instant conversions for HEX, RGB, HSV, HSL, and CMYK formats simultaneously. No manual calculations needed. Zero Data Collection: The app is 100% offline. No tracking, no analytics, and no internet connection required. Your activity stays entirely private. Clipboard Ready: Tap any code field (HEX, RGB, etc.) to copy the value instantly to your clipboard. Haptic Feedback & Dark Mode: Enjoy a polished user experience with subtle haptic feedback and automatic support for your device’s Dark/Light Mode setting. Find the perfect color, convert it instantly, and drop it into your next project with ease. Download the definitive color tool today!
Rub Memo
This app allows you to erase text by rubbing your finger over it, mimicking the feel of erasing pencil on paper. It also offers a home screen widget for quick access, reordering paragraphs, and inserting various media like tables, checklists, and drawings.
- Erase text with finger rub
- Home screen widget for notes
- Reorder paragraphs by long-press and drop
- Insert tables, checklists, images, and drawings
- Full-text search with highlighted matches
- Lock notes with Face ID/Touch ID
- Export and share as PDF
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■ Rub to erase Turn on the "Eraser" in the toolbar and just rub your finger over the text you want gone. Characters fade away one by one — no selecting and deleting. It feels like rubbing out pencil on a paper notebook, right on your phone. ■ Home Screen widget Your most recent note appears in a Home Screen widget. Tap it to jump straight back in. ■ More features ・Long-press a paragraph to lift it, then drop it anywhere to reorder ・Insert tables, checklists, images, and finger drawings (you can erase those too) ・Full-text search with highlighted matches ・Lock individual notes with Face ID / Touch ID ・Export and share as PDF ・Switch between Japanese and English ・Adjust font size, font, ruled lines, and eraser width ■ No ads, no in-app purchases, no sign-up, no data collection. All your data stays on your device.
Screenshots
Verdict
ColPick and Rub Memo are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | ColPick | Rub Memo |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | — | Every 6 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 29 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Ergun Bassan | seiji honda |
In-app purchases
ColPick
No in-app purchases
Rub Memo
No in-app purchases









