Comparison

Onyx vs DuoScreen

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Onyx

Features
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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 → Safari → Extensions and enable Onyx. 3. Tap the Onyx icon in Safari's toolbar to customize your settings.

About

DuoScreen

Features
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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

Onyx4 screens
DuoScreen4 screens

Verdict

The call

Onyx and DuoScreen are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — 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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ScorecardNo meaningful differences
Onyx versus DuoScreen: the parameters behind the verdict, then further details
ParameterOnyxDuoScreen
PriceFreeFree
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad — betteriPhone
Requires iOS26.226.0 — better
Further details — not scored
Size12 MB0 MB
Age rating17+17+
DeveloperTakaki TakemuraAlbin Shrestha

In-app purchases

None

Onyx

No in-app purchases

None

DuoScreen

No in-app purchases

Questions

Is Onyx free?
Onyx is free to download, with no in-app purchases.
Is DuoScreen free?
DuoScreen is free to download, with no in-app purchases.
Do Onyx or DuoScreen have ads?
Neither Onyx nor DuoScreen shows ads.

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