# Dark Reader for Safari vs Uno Calculator

The clearest difference is price: Uno Calculator at Free against Dark Reader for Safari's $4.99. Uno Calculator also leads on rating (4.6 vs 4.3) and review sentiment (73% vs 64%). Dark Reader for Safari's advantage is update cadence (every 2 months vs every 5 months) and chart position (#14 vs unranked). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Uno 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.

Uno Calculator holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 286 and 116 respectively. Written reviews point the same way: 64% of Dark Reader for Safari's written reviews are positive against 73% of Uno Calculator's.

Dark Reader for Safari ships an update every 2 months, Uno Calculator every 5 months. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Dark Reader for Safari | Uno Calculator |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.3 (286 ratings)](https://appshunter.io/ios/app/dark-reader-for-safari/id1438243180/reviews) | **[4.6 (116 ratings)](https://appshunter.io/ios/app/uno-calculator/id1464736591/reviews)** |
| Number of ratings | **286** | 116 |
| Positive reviews | 64.2% of reviews | **73.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Paid | **Free** |
| Best chart rank | **#14** | — |
| Size | 4 MB | 96 MB |
| Requires iOS | 15.0 | **14.2** |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Dark Reader Ltd](https://appshunter.io/developer/1438243179) | [Uno Platform Inc.](https://appshunter.io/developer/1617866832) |

## 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, #155 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


### Uno Calculator

[App page](https://appshunter.io/ios/app/uno-calculator/id1464736591)

This app offers a comprehensive suite of calculation tools, handling everything from basic arithmetic to complex unit conversions. It supports measurements for size, temperature, speed, energy, and currency, making it a versatile solution for diverse needs.

**Highlights:** Arithmetic calculations, Unit conversions, Size measurements, Temperature conversions, Speed calculations, Energy calculations, Currency exchange

**In-app purchases:** none

**What reviewers like**

- 💰 Completely free with no ads or in-app purchases
- 🎨 Clean, minimalist, and intuitive user interface
- 🔧 Multiple calculator modes (standard, scientific, programmer)
- 📊 Useful unit conversion features
- 📜 Helpful history and memory panes for tracking calculations

**What reviewers complain about**

- ⌨️ No keyboard input support on Mac or iPad (major recurring complaint)
- 📍 Calculator buttons positioned on left side (inconvenient for right-handed users)
- 📜 History pane cannot be hidden or minimized
- ⏱️ Slower app launch time compared to stock calculator
- 🐢 Laggy performance on macOS with slow button responsiveness

**Reported bugs**

- Standard calculator mode doesn't follow order of operations (1+2*3 = 9 instead of 7)
- Buttons disappear while using on iPad
- Apple Pencil input causes buttons to blend into background
- Slow key responsiveness on macOS
- Numeric keypad input not recognized from Apple keyboard

**Requested features**

- Keyboard input support for Mac and iPad (most requested)
- Copy and paste functionality for results and formulas
- Option to reposition calculator buttons to right side
- Ability to hide or collapse history pane
- Persistent history that saves after app closes


## Frequently asked questions

### Is Dark Reader for Safari free?

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

### Is Uno Calculator free?

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

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

Uno Calculator is rated higher. Dark Reader for Safari averages 4.3 out of 5 from 286 ratings, while Uno Calculator averages 4.6 from 116 ratings.

### Do Dark Reader for Safari or Uno Calculator have ads?

Neither Dark Reader for Safari nor Uno Calculator shows ads.

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

Dark Reader for Safari ships an update every 2 months, and Uno Calculator every 5 months. Most recently, Dark Reader for Safari was updated on November 11, 2026 and Uno Calculator on November 3, 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.*