RainbowCalc vs Calculator 4U
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RainbowCalc
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It has large numbers for easy visualization and better usability and accessibility! Easy to use and with easily readable characters! With this customizable calculator, it is possible to change the background and numeric key colors to the ones you like the most, bringing more visual comfort to the user. Thanks to the advanced color picker, you can choose any color! Combine colors with your phone case or device color, stand out with your unique customization. No more limited themes and colors chosen for you! Choose your favorite theme yourself. It also features a history of all calculations, where you can delete them individually or all at once, and the ability to share a calculation via messaging apps. Download this great, lightweight, beautiful, and personalized calculator for free now. • All colors are possible! • Combine colors with your style. • Calculation history and sharing. • Basic operations. • Percentage calculations. • Square root calculations.
Calculator 4U
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Experience the perfect blend of style and substance with our sleek, modern calculator. Designed for speed, accuracy, and ease of use, it handles everyday math as well as advanced calculations—making it ideal for students, professionals, and anyone who loves a beautiful, powerful tool. Key Features: • Modern Interface: Enjoy a visually appealing design with smooth gradients and rounded buttons for a stress-free user experience. • Advanced Math Tools: Perform complex operations (addition, subtraction, multiplication, division, and more) with complete precision. • History Tracking: Quickly revisit previous calculations. Swipe through, rewind, or fast-forward your history, so you never lose track of important results. • Fast Load & Haptic Feedback: Dive straight into calculations without delay. Optional sound effects make button presses feel satisfying. • Intuitive Controls: Toggle signs, use percentages, or clear the entire display with a tap. • Optimized for All Devices: Whether you’re on an iPhone or iPad, portrait or landscape, the layout adapts beautifully to your screen. Discover a calculator that not only looks good but also delivers every feature you need—right at your fingertips. Download now and see the difference!
Screenshots
Verdict
The clearest difference is ads: Calculator 4U at none against RainbowCalc's shown. RainbowCalc's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 18.2). On price, update cadence and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
RainbowCalc ships an update fortnightly, Calculator 4U every 3 weeks. The most recent releases landed on October 18, 2026 and October 6, 2026 respectively.
| Parameter | RainbowCalc | Calculator 4U |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly — better | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 18.2 |
| Further details — not scored | ||
| Size | 34 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Andre Silva | Naseer Mohammed |
In-app purchases
RainbowCalc
No in-app purchases
Calculator 4U
No in-app purchases









