# Dark Reader for Safari vs RayCrest Lab Calculator

The clearest difference is price: RayCrest Lab Calculator at Free against Dark Reader for Safari's $4.99. RayCrest Lab Calculator also leads on rating (4.7 vs 4.3). Dark Reader for Safari's advantage is ratings volume (286 vs 3) and chart position (#14 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

RayCrest Lab Calculator is free to download; Dark Reader for Safari costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RayCrest Lab Calculator holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Dark Reader for Safari has 286 ratings behind it against 3, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 11, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Dark Reader for Safari | RayCrest Lab Calculator |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.3 (286 ratings)](https://appshunter.io/ios/app/dark-reader-for-safari/id1438243180/reviews) | **[4.7 (3 ratings)](https://appshunter.io/ios/app/raycrest-lab-calculator/id6785651551/reviews)** |
| Number of ratings | **286** | 3 |
| Positive reviews | 64.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | **Free** |
| Best chart rank | **#14** | — |
| Size | 4 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Dark Reader Ltd](https://appshunter.io/developer/1438243179) | [RAYCREST SOFTWARE LLC](https://appshunter.io/developer/1847966144) |

## What reviewers say

### Dark Reader for Safari

[App page](https://appshunter.io/ios/app/dark-reader-for-safari/id1438243180)

**Currently charting:** #14 Top Paid · Productivity, #148 Top Paid (US App Store)

This Safari extension transforms websites into dark themes, reducing eye strain and improving readability. It offers customizable brightness, contrast, and color themes, and seamlessly integrates with system dark mode. Enjoy a comfortable browsing experience, especially in low light conditions.

**Highlights:** Creates dark themes for websites, Adjustable brightness and contrast, Multiple color theme presets, Customizable background and text colors, Enable/disable for specific websites, Syncs with system dark mode

**Features:** Safari Extension, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Works well on most websites
- 🚀 Fast and efficient
- 💡 Customizable settings
- 👍 Preserves website design
- 👍 Easy to enable/disable per site

**What reviewers complain about**

- 🐛 Inconsistent performance on some websites
- 🐛 Occasional rendering issues
- 🔒 Privacy concerns about data access
- 💰 Paid extension when free versions exist
- 🔋 Can slow down Safari performance

**Reported bugs**

- Extension stops working after Safari has been open for a while
- Fails to load on certain websites
- Inverts colors incorrectly on some websites

**Requested features**

- Per-site settings for Dynamic vs Filter modes
- Automatic dark mode based on time of day
- Ability to customize accent colors
- Support for PDF documents
- Sync settings across devices


### RayCrest Lab Calculator

[App page](https://appshunter.io/ios/app/raycrest-lab-calculator/id6785651551)

This app assists researchers, students, and lab teams with essential calculations for preparing buffers, solutions, and dilutions. It provides practical guidance for weighing solids, mixing stocks, and titration, with built-in tools for buffer charts, recipes, and protocol timers.

**Highlights:** Buffer preparation guidance, Henderson-Hasselbalch recipes, Stock mixing and titration, Solution and dilution calculations, Mass/volume conversions, Protocol timers, Saved recipes and compounds

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Dark Reader for Safari free?

Dark Reader for Safari costs $4.99, with no in-app purchases.

### Is RayCrest Lab Calculator free?

RayCrest Lab Calculator is free to download, with no in-app purchases.

### Which has better reviews, Dark Reader for Safari or RayCrest Lab Calculator?

RayCrest Lab Calculator is rated higher. Dark Reader for Safari averages 4.3 out of 5 from 286 ratings, while RayCrest Lab Calculator averages 4.7 from 3 ratings.

### Do Dark Reader for Safari or RayCrest Lab Calculator have ads?

Neither Dark Reader for Safari nor RayCrest Lab Calculator shows ads.

### Which is updated more often, Dark Reader for Safari or RayCrest Lab Calculator?

Dark Reader for Safari ships an update every 2 months, and RayCrest Lab Calculator every 2 months. Most recently, Dark Reader for Safari was updated on November 11, 2026 and RayCrest Lab Calculator on November 5, 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.*