GCM DIALER vs RainbowCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GCM DIALER
This communication app facilitates high-quality audio and video calls within closed groups. It offers features like audio conferencing for seamless group discussions.
- High-quality audio calling
- Audio conferencing
- Video calling
- Closed group communication
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GCM Dialer is a communication application which focuses on communication between closed group. GCM Dialer comprises of high quality audio calling, audio conferencing and video calling.
RainbowCalc
This calculator app offers extensive customization with a wide color picker for backgrounds and keys, enhancing usability and accessibility. It includes a calculation history with sharing options and supports basic arithmetic, percentages, and square roots.
- Customizable background and key colors
- Advanced color picker
- Calculation history
- Share calculations
- Basic operations
- Percentage calculations
- Square root calculations
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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.
Screenshots
Verdict
The clearest difference is rating: GCM DIALER at 5.0 against RainbowCalc's 2.0. GCM DIALER also leads on ads (none vs shown) and monetization model (free vs ad-supported). RainbowCalc's advantage is update cadence (fortnightly vs monthly) and device support (3 vs 1). On price, ratings volume 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.
GCM DIALER holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
GCM DIALER ships an update monthly, RainbowCalc fortnightly. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.
| Parameter | GCM DIALER | RainbowCalc |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 2.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Monthly | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 18.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 60 MB | 34 MB |
| Age rating | 4+ | 4+ |
| Developer | GCM TECH SOLUTIONS | Andre Silva |
In-app purchases
GCM DIALER
No in-app purchases
RainbowCalc
No in-app purchases
