# Calc vs RainbowCalc

The clearest difference is rating: Calc at 3.7 against RainbowCalc's 2.0. Calc also leads on ads (none vs shown) and monetization model (free vs ad-supported). RainbowCalc's advantage is update cadence (fortnightly vs every 10 months). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Calc holds the better App Store score, 3.7 against 2.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Calc ships an update every 10 months, RainbowCalc fortnightly. The most recent releases landed on November 2, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Calc | RainbowCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/calc-50/id1193016704/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/rainbowcalc/id6479331134/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Fortnightly** |
| Monetization | **Free** | Ad-supported |
| Size | 38 MB | 34 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [David Smith](https://appshunter.io/developer/1193016703) | [Andre Silva](https://appshunter.io/developer/1719182490) |

## What reviewers say

### Calc

[App page](https://appshunter.io/ios/app/calc-50/id1193016704)

This app offers a high-precision scientific calculator with over 50 digits of accuracy. It supports advanced mathematical functions, complex arithmetic, and programmable features for derivatives, integrals, and root finding.

**Highlights:** High-precision calculations (50+ digits), Extensive mathematical functions, Programmable features, Complex arithmetic, Graphing capabilities, Derivative and integral calculation

**Features:** macOS Compatibility

**In-app purchases:** none


### RainbowCalc

[App page](https://appshunter.io/ios/app/rainbowcalc/id6479331134)

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.

**Highlights:** Customizable background and key colors, Advanced color picker, Calculation history, Share calculations, Basic operations, Percentage calculations, Square root calculations

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calc free?

Calc is free to download, with no in-app purchases.

### Is RainbowCalc free?

RainbowCalc is free to download, with no in-app purchases.

### Which has better reviews, Calc or RainbowCalc?

Calc is rated higher. Calc averages 3.7 out of 5 from 3 ratings, while RainbowCalc averages 2.0 from 1 ratings.

### Do Calc or RainbowCalc have ads?

RainbowCalc shows ads; Calc does not.

### Which is updated more often, Calc or RainbowCalc?

Calc ships an update every 10 months, and RainbowCalc fortnightly. Most recently, Calc was updated on November 2, 2026 and RainbowCalc on October 27, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*