Onyx vs DuoScreen
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
Onyx
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Onyx is a Safari extension for iOS that brings Dark Mode to every website while blocking ads, reducing blue light, and automatically enabling on your schedule. Features ⢠Force Dark Mode on all websites ⢠7 built-in themes plus custom color creation ⢠Built-in ad blocker for faster, cleaner browsing ⢠Blue light reduction filter ⢠Schedule mode: Automatically enables Dark Mode at the times you set ⢠Per-site settings: Always On, Always Off, or Default ⢠Sync your settings across devices with iCloud Comfortable Browsing at Night Reduce eye strain from nighttime screen use. Set your preferred hours and Onyx automatically turns on Dark Mode for a more comfortable browsing experience. How to Use 1. Install the app. 2. Go to Settings ā Safari ā Extensions and enable Onyx. 3. Tap the Onyx icon in Safari's toolbar to customize your settings.
DuoScreen
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Two browsers. One screen. DuoScreen puts two real web browsers side-by-side on your iPhone. The dual-screen experience, no new hardware required. WHY DUOSCREEN ⢠Two fully independent panes, each with its own navigation, history, and media playback ⢠Drag the seam to resize either pane ⢠Double-tap to lock the split and pin the orientation ⢠Swap panes instantly without reloading either page ⢠Safari-style bottom bar that auto-hides as you scroll ⢠Video and audio in both panes at the same time ⢠Portrait stacks the panes; landscape puts them side-by-side MADE FOR MULTITASKING ⢠Compare prices and products across two stores at once ⢠Watch the stream while you browse the thread ⢠Follow a recipe while a video plays ⢠Read the docs on one side, work on the other ⢠Preview what a foldable dual-screen phone feels like PRIVATE BY DESIGN No accounts. No analytics. No tracking. No data collection. Your browsing never leaves your device. Your iPhone already has the space for two. DuoScreen splits it.
Screenshots
Verdict
Onyx and DuoScreen are too close to call on the numbers: across 5 compared parameters ā price, ads, in-app purchases and device support among them ā neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Onyx | DuoScreen |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | ā |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad ā better | iPhone |
| Requires iOS | 26.2 | 26.0 ā better |
| Further details ā not scored | ||
| Size | 12 MB | 0 MB |
| Age rating | 17+ | 17+ |
| Developer | Takaki Takemura | Albin Shrestha |
In-app purchases
Onyx
No in-app purchases
DuoScreen
No in-app purchases









