ThreeNote vs Structured Outliner
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
ThreeNote
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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: โข Unlimited nested levels for complex hierarchies โข Rich text editing for detailed notes โข Quick add for rapid idea capture โข Search functionality to find information fast โข Customizable themes to suit your style Data Export and Backup: โข Export your entire database as a SQLite file for comprehensive backups โข Generate a human-readable text file of your notes' structure and content โข 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!
Structured Outliner
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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
Verdict
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
Both are free to download. Structured Outliner sells 1 one-off in-app purchase. ThreeNote asks for nothing beyond the download.
ThreeNote ships an update daily, Structured Outliner every 9 days. The most recent releases landed on September 14, 2026 and September 19, 2026 respectively.
| Parameter | ThreeNote | Structured Outliner |
|---|---|---|
| Price | Free | Free |
| Update frequency | Daily โ better | Every 9 days |
| Ads | No โ better | Yes |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.6 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 1 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Jouni Erola | Felipe Carraro |
In-app purchases
ThreeNote
No in-app purchases
Structured Outliner
- Pro Version$7.99
Questions
Is ThreeNote free?
Is Structured Outliner free?
Do ThreeNote or Structured Outliner have ads?
Which is updated more often, ThreeNote or Structured Outliner?
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