CarbonFin Outliner

CarbonFin Outliner organizes thoughts, tasks and projects in hierarchical outlines. Tasks can contain subtasks, with progress indicators for parent tasks that have them. The editor supports inline editing, cut, copy, paste, undo, redo, drag-and-drop reordering, search, and collapsing or expanding items. Users can tag and filter outlines, search across them, archive older outlines, and optionally number items. Outlines can include notes, with configurable checkboxes, note previews and numbering. The iPhone and iPad app costs $4.99, paid once. Outliner Online is a free browser companion for syncing, editing, printing, importing, exporting and sharing outlines. Outliner can sync OPML files with Dropbox or OneDrive, import OPML files, and export outlines as plain text or OPML. Users of the app can invite other Outliner users to view and edit shared outlines; published outlines are readable by anyone with the URL. Shared editing through Outliner Online is limited to iPhone or iPad Outliner users. The app has no native printing, though synced outlines can be printed through Outliner Online in a browser.

CarbonFin Outliner provides detailed outline editing with a free browser companion and multiple import and export options. Note the limits on shared editing and printing before relying on it for those tasks.

CarbonFin Outliner suits people who want to organize projects, tasks and notes into nested lists. It may also suit users who need OPML import or export, or a browser companion for syncing and sharing outlines.

CarbonFin Outliner is a nested-list workspace for thoughts, tasks, and projects, with apps for Apple devices and a browser companion. It best suits people who naturally plan in hierarchies and want flexible rearrangement, notes, and portable outline files. The low one-time app price is appealing, but collaboration and printing require understanding how Outliner Online fits into the workflow.

Overview

Outliner treats an outline as the primary workspace, letting you break a project into hierarchical tasks and subtasks rather than forcing everything into a flat checklist. Parent tasks can show progress for their subtasks, giving multi-step work a visible status cue. Collapsing sections keeps a long plan readable, while drag-and-drop reordering supports changing priorities without rebuilding the structure.

It is a focused choice rather than an all-purpose project suite. The model works well for people who think in nested lists, meeting notes, study plans, or progressively refined ideas. Those wanting broad team-workspace features should weigh the product's sharing limits before committing.

Key features

The editor handles inline editing, cut, copy, paste, undo, and redo, alongside search and expand/collapse controls. That combination is useful when an outline is being drafted and repeatedly reshaped. Notes can accompany items, and each outline can independently configure checkboxes, note previews, and numbering, so a planning outline can behave differently from a reference outline.

Organization tools become more valuable as the collection grows. Tags and tag filters help separate subjects, search works across outlines, and archiving removes older material from the active set without discarding it. Optional numbering adds a formal structure when item references matter.

OPML import and export provide a route into and out of compatible outlining software, while plain-text export is suitable for simpler handoffs. Dropbox and OneDrive can sync outlines as OPML files. CarbonFin describes online syncing as secure, and its version history says syncing used HTTPS in version 2.1.

Outliner Online is a free browser companion for syncing, editing, printing, importing, exporting, and sharing. Outliner users can invite other Outliner users to view and edit shared outlines; a published outline can instead be read by anyone who has its URL. The distinction matters: shared editing through Outliner Online is limited to people using Outliner on iPhone or iPad. The app itself has no native printing, so paper copies depend on the browser companion and a web browser.

Pricing

Outliner Online — $$0, free. This browser companion covers syncing, editing, printing, importing, exporting, and sharing, making it useful even for owners who mainly work in an app. It is also the required path for printing.

Outliner — $$4.99, once. The one-time purchase is for the iPhone and iPad app. It is a modest entry cost for users who want native mobile outlining and do not need a recurring subscription. Buyers should remember that the purchase does not remove the browser dependency for printing, and shared editing remains restricted to iPhone or iPad Outliner users.

Platforms

CarbonFin lists iOS, macOS, and web availability. The paid Outliner app is identified for iPhone and iPad, while Outliner Online supplies browser access for syncing, editing, file exchange, printing, and sharing. Dropbox and OneDrive integration is based on OPML files, and exports are available as OPML or plain text.

Who it's for

Choose CarbonFin Outliner if your work is best represented by nested tasks, you want outline-level controls for notes and numbering, and you value OPML portability. The low one-time iPhone and iPad price also fits an individual who prefers avoiding a subscription.

It is less suitable for teams requiring unrestricted collaborative editing, since shared editing is confined to Outliner users on iPhone or iPad. It is also a poor fit if printing must happen directly from the app rather than through a browser.

Pros and cons

Pros

• Strong hierarchical planning: Subtasks, parent-task progress, and collapse controls keep complex work navigable.
• Useful outline management: Tags, cross-outline search, archiving, numbering, and configurable notes support a substantial outline library.
• Portable formats: OPML import/export, plain-text export, and Dropbox or OneDrive OPML syncing ease migration and backup workflows.
• Low upfront cost: The iPhone and iPad app costs $4.99 once, with a free browser companion.

Cons

• Restricted collaboration: Shared editing through Outliner Online is only for people using Outliner on iPhone or iPad.
• No native printing: Printing requires syncing to Outliner Online and using a web browser.
• Outline-first scope: Its strengths center on nested lists, so it may not satisfy readers seeking a broader project-management workspace.

Alternatives

Outlining Software is the broader directory starting point when you want to compare more outlining tools.

Pick Outliner by Alfred Fritz instead for Android access and a free app with a $5.00 one-time Pro Key; its free tier has no sync.

Workflowy is the better choice for broad platform coverage, including Android, Windows, Linux, web, and API access, with a free tier capped at 100 nodes per month and 100 MB of file uploads.

Choose Bulletlist if you want a free service where every feature is included without caps or locked tiers across Android, iOS, macOS, and web.

Checkvist suits readers prioritizing unlimited hierarchical lists and unlimited sharing and collaboration on its free plan.

Cloud Outliner is an alternative for an iOS and macOS-focused setup with Pro sync across iPhone, iPad, and Mac.

Dynalist is worth choosing for unlimited items and documents on its free plan and wider platform support, including Windows, Linux, Android, and web.

Legend offers a multi-platform pane-and-plugin approach with unlimited documents and items on its free tier.

Logseq is the alternative for a free personal-use knowledge tool spanning Android, iOS, desktop, and web.

Verdict

CarbonFin Outliner is a strong fit for individual planners who want a capable hierarchical editor, portable OPML files, and a low one-time iPhone or iPad purchase. Choose it for focused outline work and flexible reorganization; look elsewhere when unrestricted team editing or direct in-app printing is essential.