Spectraless vs Onyx
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Spectraless
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Spectraless is a Safari extension for removing the Spectral font from Substack newsletters in order to improve their readability. It works on newsletters that use the substack.com domain as well as those using custom domains.
Onyx
This Safari extension for iOS applies a dark mode to all websites, blocks ads, and reduces blue light. It offers customizable themes and scheduling for a more comfortable browsing experience, especially at night.
- Force Dark Mode on all websites
- 7 built-in themes plus custom colors
- Built-in ad blocker
- Blue light reduction filter
- Scheduled Dark Mode activation
- Per-site settings
- iCloud settings sync
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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.
Screenshots
Verdict
The clearest difference is in-app purchases: Spectraless at none against Onyx's 1. Spectraless also leads on iOS requirement (18.5 vs 26.2). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Onyx sells 1 one-off in-app purchase. Spectraless asks for nothing beyond the download.
| Parameter | Spectraless | Onyx |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | — | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 18.5 — better | 26.2 |
| Further details — not scored | ||
| Size | 0 MB | 12 MB |
| Age rating | 4+ | 17+ |
| Developer | Jeremy Kanter | Takaki Takemura |
In-app purchases
Spectraless
No in-app purchases
Onyx
- Onyx Pro$2.99









