Comparison

Block Spam vs OpenHTML

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

Head to head
About

Block Spam

Features
Read full description

Block Spam is a software that can customize caller identification and call blocking. Just edit the number to be identified / blocked, and click [Reload Extension] to complete the configuration. * Custom caller identification and call blocking * Batch block phone numbers * Show the country / region where the number is added * Support multi-country number addition * Clear all blocked calls with one click Tips: After each operation, please click [Reload Extension] to take effect. If you are prompted that you do not have permission, please enter the permission in the phone [Settings]-> [Phone]-> [Call blocking & Identification].

About

OpenHTML

A private, on-device viewer for HTML, Markdown, ZIP web projects, and source files on iOS. Inspect files offline, diagnose rendering issues, and export clean copies. Designed for developers, students, and anyone needing to safely view web content.

Highlights
  • View HTML, Markdown, ZIP archives
  • Offline preview with network access off
  • Diagnose rendering and JavaScript issues
  • Code-friendly reader for JSON, XML, source files
  • Export pages to PDF or long images (Pro)
  • iCloud Drive integration for multi-device access (Pro)
Features
Read full description

OpenHTML is a private, on-device viewer for HTML, Markdown, ZIP web projects and source files on iPhone and iPad. Open files from Files, Mail, chat apps, AI tools or Safari. Preview pages offline, inspect what went wrong when a file does not render, and export finished pages when you need a clean copy. What you can do: - Open .html, .htm, .xhtml and Markdown files - Import ZIP archives and multi-file web projects - Render LaTeX math in Markdown offline, with no scripts - Preview local pages with network access off by default - Diagnose missing files, blocked resources and JavaScript issues - View JSON, XML and source files with a code-friendly reader - Export full pages to PDF or long images with OpenHTML Pro - Keep selected files in your OpenHTML folder in iCloud Drive and open them on your other devices with OpenHTML Pro Private by default: OpenHTML has no accounts, no analytics and no ads. Files are copied into the app's private storage and stay on your device unless you add them to your own OpenHTML folder in iCloud Drive. Remote resources stay blocked unless you choose to allow them for a trusted document. OpenHTML is designed for developers, students, researchers, writers and anyone who receives HTML reports, AI-generated pages, saved webpages or packaged web projects and wants to inspect them safely on iOS.

Screenshots

Block Spam4 screens
OpenHTML4 screens

Verdict

The call

The clearest difference is price: OpenHTML at Free against Block Spam's $0.99. OpenHTML also leads on update cadence (every 5 days vs every 4 months). Block Spam's advantage is in-app purchases (none vs 1) and iOS requirement (15.6 vs 18.0). On 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

CostPrice · In-app purchases · Ads · Monetization

OpenHTML is free to download; Block Spam costs $0.99 up front. OpenHTML sells 1 one-off in-app purchase. Block Spam asks for nothing beyond the download.

UpkeepUpdate frequency

Block Spam ships an update every 4 months, OpenHTML every 5 days. The most recent releases landed on November 11, 2026 and November 10, 2026 respectively.

Scorecard4 real differences · 6 level
Block Spam versus OpenHTML: the parameters behind the verdict, then further details
ParameterBlock SpamOpenHTML
Price$0.99Free — better
Rating—5.0 (5 ratings) — better
Positive reviews—71.4% of reviews
Number of ratings—5 — better
Update frequencyEvery 4 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.6 — better18.0
Further details — not scored
Size11 MB20 MB
Age rating4+4+
Developer恒俭 董吉帅 仇

In-app purchases

None

Block Spam

No in-app purchases

1 purchases

OpenHTML

One-time1
  • OpenHTML Pro$2.99

Questions

Is Block Spam free?
Block Spam costs $0.99, with no in-app purchases.
Is OpenHTML free?
OpenHTML is free to download, with in-app purchases available.
Do Block Spam or OpenHTML have ads?
Neither Block Spam nor OpenHTML shows ads.
Which is updated more often, Block Spam or OpenHTML?
Block Spam ships an update every 4 months, and OpenHTML every 5 days. Most recently, Block Spam was updated on November 11, 2026 and OpenHTML on November 10, 2026.

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