Comparison

Obsidian vs Heardline Infinite Dictionary

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

Head to head
About

Obsidian

Organize your thoughts and ideas with a powerful knowledge base that utilizes local Markdown files. This app acts as your personal second brain, accessible on your mobile device for seamless note-taking and idea connection.

Highlights
  • Local Markdown file storage
  • Customizable toolbar
  • Graph view for connections
  • Community plugins
  • Themes
  • iCloud sync
Features
Read full description

Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files. It is a second brain, for you, forever. Now available on the go for iOS! Features include: - Customizable toolbar - Pull down quick actions - Graph view - Community plugins - Themes - Sidebar pinning for tablet - iCloud vaults

About

Heardline Infinite Dictionary

Features
Read full description

Heardline | The Infinite Dictionary Discover language in a whole new way. Infyrium is an interactive dictionary built for people who love words, learning, and exploration. Instead of looking up one definition at a time, Infyrium lets you move through language endlessly—every word you tap opens a new definition, creating a smooth, infinite chain of discovery. No dead ends. No limits. Just pure curiosity. How It Works Start with any word. Read its definition, examples, and related terms. Tap any word inside the definition to instantly open its meaning. Keep going as far as your curiosity takes you. Heardline turns language into a living map you can explore. Why You'll Love It Endless Discovery: Every word leads to more words, creating an infinite learning loop. Clean, Focused Design: No clutter. No distractions. Just clear definitions with fast navigation. Learn Naturally: Understand words in context by seeing how they connect to each other. Build Vocabulary Effortlessly: Perfect for students, writers, learners, or anyone curious about language. A New Way to Explore Language: Not a list of definitions—an entire world of words you can walk through. Who It’s For Learners who want a simpler way to understand vocabulary Writers looking for inspiration Curious minds who love exploring ideas Anyone who wants a smarter, more intuitive dictionary

Screenshots

Obsidian4 screens
Heardline Infinite Dictionary3 screens

Verdict

The call

The clearest difference is update cadence: Obsidian at every 3 weeks against Heardline Infinite Dictionary's every 8 months. Obsidian also leads on chart position (#123 vs unranked) and device support (3 vs 1). On price, ads, in-app purchases 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

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

UpkeepUpdate frequency

Obsidian ships an update every 3 weeks, Heardline Infinite Dictionary every 8 months. The most recent releases landed on October 29, 2026 and October 4, 2026 respectively.

Scorecard3 real differences · 8 level
Obsidian versus Heardline Infinite Dictionary: the parameters behind the verdict, then further details
ParameterObsidianHeardline Infinite Dictionary
PriceFreeFree
Rating4.5 (2.8K ratings) — better—
Positive reviews62.0% of reviews—
Number of ratings2.8K — better—
Update frequencyEvery 3 weeks — betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
Best chart rank#123 — better—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better16.4
Further details — not scored
Size40 MB52 MB
Age rating4+4+
DeveloperDynalist Inc.Oluwafemi Obajuluwa

Bugs and requests

Obsidian

Reported bugs

3 issues
  • Sync issues leading to data loss
  • Freezing and crashing on mobile devices
  • Editing bugs and text input issues

Requested features

5 requests
  • Improved sorting and organization options
  • WYSIWYG editing on mobile
  • Better integration with other cloud storage services
  • More intuitive onboarding process for new users
  • Native mobile widgets and share sheet integration

Heardline Infinite Dictionary

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Obsidian

No in-app purchases

None

Heardline Infinite Dictionary

No in-app purchases

Questions

Is Obsidian free?
Obsidian is free to download, with no in-app purchases.
Is Heardline Infinite Dictionary free?
Heardline Infinite Dictionary is free to download, with no in-app purchases.
Do Obsidian or Heardline Infinite Dictionary have ads?
Neither Obsidian nor Heardline Infinite Dictionary shows ads.
Which is updated more often, Obsidian or Heardline Infinite Dictionary?
Obsidian ships an update every 3 weeks, and Heardline Infinite Dictionary every 8 months. Most recently, Obsidian was updated on October 29, 2026 and Heardline Infinite Dictionary on October 4, 2026.

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