# RedCrab Calculator vs Moolight

The clearest difference is ads: Moolight at none against RedCrab Calculator's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. RedCrab Calculator sells 1 one-off in-app purchase and Moolight sells 5 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

RedCrab Calculator ships an update fortnightly, Moolight every 11 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | RedCrab Calculator | Moolight |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Every 11 days** |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 15 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [少泽 梁](https://appshunter.io/developer/897112791) | [畅 刘](https://appshunter.io/developer/1777588920) |

## 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 |


### Moolight

[App page](https://appshunter.io/ios/app/moolight-screen-light-and-flash/id6738958459)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Moolight Pro Monthly | $0.99 | per month |
| Moolight Pro Annual | $3.99 | per year |
| Moolight Pro Annual | $3.99 | per year |
| Moolight Pro Annual | $3.99 | per year |
| Moolight Pro Lifetime | $7.99 | one-time |


## Frequently asked questions

### Is RedCrab Calculator free?

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

### Is Moolight free?

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

### Do RedCrab Calculator or Moolight have ads?

RedCrab Calculator shows ads; Moolight does not.

### Which is updated more often, RedCrab Calculator or Moolight?

RedCrab Calculator ships an update fortnightly, and Moolight every 11 days. Most recently, RedCrab Calculator was updated on October 27, 2026 and Moolight on October 28, 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.*