Comparison

Tana Outliner vs HTML Previewer

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

Head to head
About

Tana Outliner

This app is an AI-powered workspace designed to capture and organize your thoughts. It allows for quick idea capture, voice memo recording with transcription, and automatic organization into actionable items. Access your information on the go with advanced AI workflows available.

Highlights
  • AI-powered note-taking
  • Voice memo recording and transcription
  • Automatic organization of notes
  • Media uploads and text scanning
  • Offline note-taking
  • Actionable content transformation
Features
Read full description

Meet Tana Outliner – The next-gen all-in-one workspace built for AI and voice. Get Started with a Free 14-Day Trial and instantly turn thoughts into structured, ready to use action items, no matter where you are. After the trial, continue using basic features for free or unlock AI-powered workflows with a subscription. Why You Should Get It ↓ CAPTURE IDEAS AND THOUGHTS FAST - Media uploads, text scanning, smooth offline note-taking, and more (Free). - Record voice memos with AI transcription and processing (Requires In-App Purchase). AUTOMATICALLY ORGANIZE NOTES - Transform notes into actionable content like tasks, projects, and more. - Voice memos require an In-App Purchase to unlock AI-powered transcription. ACCESS ALL YOUR INFORMATION ON THE GO - Browse your content, get overviews, and access pinned items (Free). - Advanced AI workflows require an In-App Purchase. Free Trial and Paid Features - Tana Outliner offers a free 14-day trial for all premium features, including AI-powered voice memos and advanced workflows. After the trial, these features require an In-App Purchase.

About

HTML Previewer

Read full description

Open received HTML and ZIP reports, read Markdown notes, and inspect JSON or YAML on iPhone and iPad. Files are processed on your device. Read the content, keep the formatting - View HTML layouts, graphics, and animations. - Read Markdown tables and highlighted code, with one-tap code copying. - Display Markdown math equations and Mermaid diagrams offline. - Browse HTML and Markdown pages inside ZIP reports with local CSS and image assets. - Search within HTML and Markdown, navigate headings, adjust reading appearance, and reopen at your saved reading position. Inspect JSON and YAML - Expand nested objects and arrays, search fields and values, and check highlighted source with line numbers. - Copy values or field paths and jump to the corresponding source line. - View and copy large JSON numeric IDs without rounding their digits. - Locate syntax errors by line and column. YAML also supports multiple documents. Import, organize, and share - Open files from Files, Mail, AirDrop, messaging apps, cloud drives, or other apps. Open/share menu availability depends on iOS and the source app. - Select multiple documents or ZIP packages. Update duplicates, keep both copies, or skip individual files, then review import results. - Paste HTML, Markdown, JSON, or YAML text to create a local preview. - Find saved files by filename, pin frequent documents, and rename display titles. - Share original files or complete ZIP packages. Export HTML and Markdown previews as PDF. - Try the built-in HTML, Markdown, JSON, YAML, and ZIP samples. Supported extensions: .html, .htm, .md, .markdown, .json, .yaml, .yml, and .zip. JSON and YAML previews are read-only and share the original file. JSONC comments and trailing commas are not supported. PDF export is available for HTML and Markdown. Privacy and purchase Files are processed on device; the app does not upload your files. No account or ads. Paid download with no subscription or in-app purchase. New HTML files, including HTML inside ZIP packages, open in Interactive mode with page JavaScript and external resources enabled. The HTML content can make network requests. Select Safe Preview to block page scripts and external HTTP/HTTPS resources. External navigation and form navigation remain blocked in both modes. Saved preview choices are preserved when reopening files.

Screenshots

Tana Outliner4 screens
HTML Previewer4 screens

Verdict

The call

The clearest difference is price: Tana Outliner at Free against HTML Previewer's $5.99. HTML Previewer's advantage is in-app purchases (none vs 4) and update cadence (every 4 days vs every 8 days). On ads, device support and iOS requirement 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

Tana Outliner is free to download; HTML Previewer costs $5.99 up front. Tana Outliner sells 4 in-app purchases, starting at $10.00 per month. HTML Previewer asks for nothing beyond the download.

UpkeepUpdate frequency

Tana Outliner ships an update every 8 days, HTML Previewer every 4 days. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

Scorecard3 real differences · 7 level
Tana Outliner versus HTML Previewer: the parameters behind the verdict, then further details
ParameterTana OutlinerHTML Previewer
PriceFree — better$5.99
Rating4.0 (50 ratings) — better—
Positive reviews48.3% of reviews—
Number of ratings50 — better—
Update frequencyEvery 8 daysEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size172 MB9 MB
Age rating4+4+
DeveloperTanaSHIFENG ZHANG

In-app purchases

4 purchases

Tana Outliner

Subscriptions4
  • Tana Plus Monthly14 Days trial$10.001 Month
  • Tana Pro Monthly14 Days trial$17.991 Month
  • Tana Plus Yearly14 Days trial$96.001 Year
Show 1 more
  • Tana Pro Yearly14 Days trial$167.991 Year
None

HTML Previewer

No in-app purchases

Questions

Is Tana Outliner free?
Tana Outliner is free to download, with in-app purchases available.
Is HTML Previewer free?
HTML Previewer costs $5.99, with no in-app purchases.
Do Tana Outliner or HTML Previewer have ads?
Neither Tana Outliner nor HTML Previewer shows ads.
Which is updated more often, Tana Outliner or HTML Previewer?
Tana Outliner ships an update every 8 days, and HTML Previewer every 4 days. Most recently, Tana Outliner was updated on October 24, 2026 and HTML Previewer on October 11, 2026.

Other comparisons