# RedCrab Calculator vs Basic Calculator With BIDMAS

The clearest difference is update cadence: Basic Calculator With BIDMAS at weekly against RedCrab Calculator's fortnightly. RedCrab Calculator's advantage is iOS requirement (15.6 vs 17.0). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. RedCrab Calculator sells 1 one-off in-app purchase and Basic Calculator With BIDMAS sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

RedCrab Calculator ships an update fortnightly, Basic Calculator With BIDMAS weekly. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | RedCrab Calculator | Basic Calculator With BIDMAS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (6 ratings)](https://appshunter.io/ios/app/basic-calculator-with-bidmas/id6758761367/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 5 MB | 91 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [少泽 梁](https://appshunter.io/developer/897112791) | [Paul Flowers](https://appshunter.io/developer/1874852072) |

## What reviewers say

### RedCrab Calculator

[App page](https://appshunter.io/ios/app/redcrab-calculator/id947845140)

This powerful scientific calculator offers a modern UI and robust engine for users of all levels. It handles basic arithmetic to complex engineering equations with smart expression parsing and a high-precision display. Enjoy a seamless calculation experience with features like history recall and dark mode.

**Highlights:** Basic & Advanced Calculations, Smart Expression Parsing, Calculation History & Reuse, High-Precision Display, Dark Mode & Modern UI, VIP Ad-Free Experience

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 终身会员 | $1.99 | one-time |


### Basic Calculator With BIDMAS

[App page](https://appshunter.io/ios/app/basic-calculator-with-bidmas/id6758761367)

This app offers a customizable calculator experience with a clean interface and advanced features like PEMDAS mode and calculation history. Personalize its appearance with numerous themes and button styles to suit your preferences.

**Highlights:** PEMDAS order of operations mode, Over 50 customizable color themes, Full calculation history, Adjustable decimal precision, Copy and paste functionality, Sales tax calculations

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| More Beans Calculator | $2.99 | one-time |


## Frequently asked questions

### Is RedCrab Calculator free?

RedCrab Calculator is free to download, with in-app purchases available.

### Is Basic Calculator With BIDMAS free?

Basic Calculator With BIDMAS is free to download, with in-app purchases available.

### Do RedCrab Calculator or Basic Calculator With BIDMAS have ads?

Both RedCrab Calculator and Basic Calculator With BIDMAS show ads.

### Which is updated more often, RedCrab Calculator or Basic Calculator With BIDMAS?

RedCrab Calculator ships an update fortnightly, and Basic Calculator With BIDMAS weekly. Most recently, RedCrab Calculator was updated on October 29, 2026 and Basic Calculator With BIDMAS on October 31, 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.*