Comparison

Spectraless vs HTML Viewer (013653)

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

Head to head
About

Spectraless

Features
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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.

About

HTML Viewer (013653)

Features
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Every HTML file you generate with AI deserves a proper home โ€” and a proper canvas. HTML Viewer is the studio built for the age of AI-generated code. Whether you're creating dashboards, prototypes, or data visualizations from any AI assistant or large language model, this app gives your HTML artifacts the full-fidelity rendering environment they deserve. IMPORT FROM FILES, INSTANTLY Bring in any HTML file straight from the Files app โ€” iCloud Drive, local storage, or any connected provider. No copy-pasting, no workarounds. Tap, import, and render. ORGANIZED THE WAY YOU WORK Build a nested folder structure and manage all your HTML files in a collapsible file tree. When it's time to focus, one tap hides the entire sidebar and expands the canvas to fill your screen. TABS AND SPLIT VIEW Open multiple HTML files at once with a clean tabbed interface, or activate split view to compare two files side by side. Perfect for reviewing iterations, design variations, or before-and-after states across your projects. YOUR FILES, YOUR DEVICE Everything stays on your device. No uploads, no remote servers, no accounts required. Your files are stored privately on-device by default. HTML Viewer is the tool that was missing from every AI-assisted workflow. Download it today and give your artifacts a studio-grade home.

Screenshots

Spectraless2 screens
HTML Viewer (013653)2 screens

Verdict

The call

Spectraless and HTML Viewer (013653) are too close to call on the numbers: across 5 compared parameters โ€” price, ads, in-app purchases and device support among them โ€” neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

ScorecardNo meaningful differences
Spectraless versus HTML Viewer (013653): the parameters behind the verdict, then further details
ParameterSpectralessHTML Viewer (013653)
PriceFreeFree
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, Mac โ€” betteriPhone, iPad
Requires iOS18.518.0 โ€” better
Further details โ€” not scored
Size0 MB3 MB
Age rating4+17+
DeveloperJeremy KanterNaoya Yamashita

In-app purchases

None

Spectraless

No in-app purchases

None

HTML Viewer (013653)

No in-app purchases

Questions

Is Spectraless free?
Spectraless is free to download, with no in-app purchases.
Is HTML Viewer (013653) free?
HTML Viewer (013653) is free to download, with no in-app purchases.
Do Spectraless or HTML Viewer (013653) have ads?
Neither Spectraless nor HTML Viewer (013653) shows ads.

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