Comparison

ThreeNote vs Structured Outliner

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

Head to head
About

ThreeNote

Features
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Your Personal Knowledge Forest Tired of scattered notes and disorganized thoughts? TreeNote is here to help you cultivate a thriving ecosystem of ideas. With its intuitive tree-like structure, TreeNote allows you to: Create Hierarchies: Organize your notes in a logical, branching structure. Link Related Concepts: Connect ideas across different branches with ease. Quick Navigation: Zoom in and out of your knowledge tree effortlessly. Mobile-Friendly: Access your ideas anytime, anywhere on your iOS device. Secure: Keep your thoughts safe with local storage. Easy Sharing: Export your data for backup or sharing. Key Features: โ€ข Unlimited nested levels for complex hierarchies โ€ข Rich text editing for detailed notes โ€ข Quick add for rapid idea capture โ€ข Search functionality to find information fast โ€ข Customizable themes to suit your style Data Export and Backup: โ€ข Export your entire database as a SQLite file for comprehensive backups โ€ข Generate a human-readable text file of your notes' structure and content โ€ข Email both SQLite and text files directly from the app for easy sharing and safekeeping Whether you're a student organizing study materials, a professional managing projects, or a creative mind mapping out stories, TreeNote adapts to your needs. Start planting your ideas today and watch your knowledge grow!

About

Structured Outliner

Features
Read full description

Keep your entire outline in a single portable file you control. No account, no server, no lock-in, future-proof. ORGANIZE IN UNLIMITED DEPTH Build trees as deep as you need. Expand, collapse, and reorder topics with just a few taps. Every topic can have its own notes. Write as much or as little as you like. SEARCH EVERYTHING Search titles or note content at once. The tree expands automatically to show every match in context, so you always know where a result lives in your outline. CROSS-LINK TOPICS Link any note to another topic using the outlook: link format. Tap to jump directly there. Tap the back arrow to return where you came from. OPEN FILES AND URLS Tap any file path or URL inside a note to open it. Connect your outline to existing documents in the folder: PDFs, photos, or anything else you reference. COLOR LABELS Assign a background color to any topic: Red, Orange, Yellow, Green, Blue, or Purple. The color flows down to all child topics that don't have their own. Use it to visually separate sections at a glance. AUTOMATIC BACKUPS The app writes a .bak backup before every save. Restore at any time from the menu. SYNC YOUR WAY Store your file in iCloud, Dropbox, Google Drive, or any Files-compatible provider. Open it from there on each device. No special sync setup required. MEMPAD COMPATIBLE Structured Outliner uses the same .lst format as MemPad for Windows, a portable outliner that has been around since the early 2000s. Open existing MemPad files directly, no conversion needed. FREE VERSION Structured Outliner is free to use. Development is supported by a small banner ad shown at the bottom of the screen. PRO VERSION Upgrade to Pro to remove the banner ad, unlock Color Labels and Topic + Note Search and future planned features. One-time purchase. Restore on any device from the menu.

Screenshots

ThreeNote1 screens
Structured Outliner4 screens

Verdict

The call

The clearest difference is in-app purchases: ThreeNote at none against Structured Outliner's 1. ThreeNote also leads on ads (none vs shown) and update cadence (daily vs every 9 days). On price, device support and iOS requirement there is nothing between them.

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. Structured Outliner sells 1 one-off in-app purchase. ThreeNote asks for nothing beyond the download.

UpkeepUpdate frequency

ThreeNote ships an update daily, Structured Outliner every 9 days. The most recent releases landed on September 14, 2026 and September 19, 2026 respectively.

Scorecard3 real differences ยท 3 level
ThreeNote versus Structured Outliner: the parameters behind the verdict, then further details
ParameterThreeNoteStructured Outliner
PriceFreeFree
Update frequencyDaily โ€” betterEvery 9 days
AdsNo โ€” betterYes
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.6 โ€” better17.0
Further details โ€” not scored
Size1 MB6 MB
Age rating4+4+
DeveloperJouni ErolaFelipe Carraro

In-app purchases

None

ThreeNote

No in-app purchases

1 purchases

Structured Outliner

One-time1
  • Pro Version$7.99

Questions

Is ThreeNote free?
ThreeNote is free to download, with no in-app purchases.
Is Structured Outliner free?
Structured Outliner is free to download, with in-app purchases available.
Do ThreeNote or Structured Outliner have ads?
Structured Outliner shows ads; ThreeNote does not.
Which is updated more often, ThreeNote or Structured Outliner?
ThreeNote ships an update daily, and Structured Outliner every 9 days. Most recently, ThreeNote was updated on September 14, 2026 and Structured Outliner on September 19, 2026.

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