Comparison

Cairn vs WP Project Manager

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

Head to head
About

Cairn

Manage tasks and notes directly within your existing Markdown files. This app offers focused views, quick capture, and robust task management features, all while keeping your data private and locally stored. It integrates seamlessly with Obsidian and other file sync services.

Highlights
  • Native Markdown task and note management
  • Works with Obsidian vaults or any folder
  • Quick capture with date, tag, and priority parsing
  • Multiple task views (Today, Upcoming, Inbox, Pool)
  • Full support for sub-tasks and recurring tasks
  • Local reminders and Live Activity integration
  • Data stays local, no cloud sync required
Read full description

Cairn is a fast, native task and note companion that lives on top of the Markdown files you already own. Point it at your Obsidian vault — or any folder of Markdown notes — and your tasks and notes appear in clean, focused views. Everything you do in Cairn is written straight back to your files as plain text, in the Obsidian Tasks format. YOUR NOTES STAY YOURS • No account, no sign-up, no Cairn cloud database — your tasks live in your own files • Cairn does not send your notes or tasks to the developer • Careful, patch-based edits change only the content you touched, preserving the rest of your note • Works alongside Obsidian, iCloud Drive, Git, or any sync you already use CAPTURE, BROWSE, AND PLAN • Browse and edit Markdown notes directly in your vault • Quick capture into your daily note, with date, tag, and priority tokens parsed as you type • Choose where longer captures are saved • Today, Upcoming, Inbox, and Pool views, plus a global filter for folders, tags, dates, priority, and status • Full support for sub-tasks and task hierarchies • Recurring tasks in Obsidian Tasks format, with safe completion handling • Convert upcoming calendar events into tasks, or mirror your dated tasks into a calendar you choose (optional) STAY ON TRACK • Local reminders for due tasks — including sunrise-relative reminders computed entirely on your device • A Live Activity keeps today's progress on your Lock Screen and in the Dynamic Island • Home Screen widgets and a Control Center quick-capture control • Search across every task in your vault MADE FOR OBSIDIAN — NOT ONLY OBSIDIAN Cairn reads and writes the Obsidian Tasks plugin format (due, scheduled, start, and done dates, priorities, recurrence, tags), so your vault stays fully compatible with your desktop setup. Don't use Obsidian? Create a plain task folder in the Files app and Cairn works as a stand-alone Markdown to-do app. Cairn asks for access only to the folder you pick. Calendar access and location (used to compute local sunrise times) are optional and processed on your device. If you choose iCloud Drive or another Files or calendar provider, that provider's own sync and privacy terms apply.

About

WP Project Manager

Features
Read full description

If you already use WP Project Manager on your WordPress website, this mobile app is built directly for you. Connect your site in seconds and keep track of your team, tasks, and deadlines without staying glued to your desk. QUICK AND SIMPLE SETUP * Type in your WordPress site URL. * Log in using your regular WordPress account details. * Access your projects instantly with zero extra setup or added plugins. COMPLETE TASK MANAGEMENT * Create tasks and subtasks on the spot. * Set due dates, priority levels, and assign work to your team. * Update task progress, mark items complete, or shift status quickly. VIEWS THAT MATCH YOUR WORKFLOW * Task Lists: Clear, detailed lists for daily work tracking. * Kanban Boards: Move tasks visually between stages to track workflow. * Gantt Charts: View project timelines, milestones, and task dependencies. EASY TEAM COLLABORATION * Join task discussions and post comments from your phone. * Attach documents and images directly to specific tasks. * Get instant notifications for new assignments, comments, and deadline reminders. * Check activity logs to see recent updates across all your projects. WHO USES THIS APP? * Freelancers managing work across multiple client projects. * Agencies and marketing teams coordinating campaigns. * Business owners who need quick project updates during meetings or travel. * Development teams tracking sprints and daily progress. ALWAYS IN SYNC Everything connects directly to your WordPress site. The app respects your existing WordPress user roles and permissions, keeping your project data safe and organized. Note: This is a companion app. You need an active WordPress website with the WP Project Manager plugin installed and a valid user login to use this app. [:mav: 1.1.1]

Screenshots

Cairn4 screens
WP Project Manager4 screens

Verdict

The call

The clearest difference is update cadence: Cairn at every 5 days against WP Project Manager's monthly. WP Project Manager's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support 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

Cairn ships an update every 5 days, WP Project Manager monthly. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

Scorecard2 real differences · 8 level
Cairn versus WP Project Manager: the parameters behind the verdict, then further details
ParameterCairnWP Project Manager
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 5 days — betterMonthly
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.0 — better
Further details — not scored
Size9 MB38 MB
Age rating4+4+
DeveloperYoung Hun JEONGweDevs Pte. Ltd.

In-app purchases

None

Cairn

No in-app purchases

None

WP Project Manager

No in-app purchases

Questions

Is Cairn free?
Cairn is free to download, with no in-app purchases.
Is WP Project Manager free?
WP Project Manager is free to download, with no in-app purchases.
Do Cairn or WP Project Manager have ads?
Neither Cairn nor WP Project Manager shows ads.
Which is updated more often, Cairn or WP Project Manager?
Cairn ships an update every 5 days, and WP Project Manager monthly. Most recently, Cairn was updated on October 1, 2026 and WP Project Manager on October 12, 2026.

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