Principal Task vs Sublime Task
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Principal Task
This app helps you manage tasks by tracking your completion rate against new tasks created. It offers a unique 'Task Velocity' score to show if you're keeping up with your workload. Organize with folders, contexts, and priorities, with advanced features available through a premium subscription.
- Task Velocity score
- GTD-native structure
- Due dates and repeating tasks
- Markdown support
- Kanban boards
- Private templates
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Track your Task Velocity — the ratio of tasks you complete against the ones you create, updated every day. See at a glance whether you're ahead or falling behind, not just what's on your list. Principal Task is a GTD-native task manager built for people who've outgrown to-do apps. Folders, contexts, priorities, statuses, and unlimited nested subtasks — organized the way real work actually happens. TASK VELOCITY Your 30-day completed-vs-created ratio, shown as a simple multiplier. Free members see their current score. Premium unlocks the full history, filterable by folder, context, priority, and status. SYSTEM HEALTH A live verdict — Healthy, Strained, or Overloaded — so you know where things stand today, separate from where they're heading. BUILT FOR GTD Folders and sub-folders, contexts, priorities, statuses, and stars. Subtasks nest as deep as you need, with independent completion — no forced parent-child status. KANBAN, HEATMAP, TEMPLATES See your work as a board. Watch your activity over time. Turn repeatable processes into templates you can apply in one tap. BUILT FOR AI ASSISTANTS Principal Task connects to AI assistants over MCP — read and write your tasks, subtasks, and folders directly from the assistant you already use. SHARE WITHOUT FRICTION Share a task list with a four-word link. No account required to view. You control how long it stays open. Free, no credit card. Premium is about $3/month or $24/year, and it doesn't limit how much you can do — it unlocks Task Velocity history, Kanban, the Activity Heatmap, and private templates. Principal Task. Software that gets out of the way. Terms of Use: https://principaltask.com/terms
Sublime Task
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Your mind is for having ideas—not holding every loose end. Sublime Task turns scattered commitments into a calm, dependable system inspired by GTD. Capture anything in seconds, clarify what it means, organize the next action, and choose what to do with confidence. FROM INBOX TO ACTION • Capture tasks and ideas before they slip away • Use a guided clarify flow to decide whether an item is actionable • Add notes and checklists without losing context ORGANIZE YOUR WHOLE SYSTEM • Connect actions to goals, areas of focus, projects, and contexts • Plan with start dates, due dates, energy, and time required • Build custom action lists and filter for exactly what fits now • Keep reference material and review checklists together SEE THE BIG PICTURE • View internal events and actions in calendar views • Keep waiting, someday, tickler, completed, and uncategorized items in their proper place • Review your system regularly so it stays current • Sign in to keep your Sublime Task workspace available across supported devices OPTIONAL CALENDAR CONNECTION Connect Google Calendar only if you want to. Sublime Task can project its events into a dedicated managed calendar and show selected external or device calendars read-only. External events are never edited by Sublime Task. SUBSCRIPTION Sublime Task for iPhone requires an auto-renewing monthly or annual subscription. Apple may offer eligible new subscribers a 7-day introductory trial. Eligibility, price, and final terms are shown before you confirm. If no trial applies, Apple shows the subscription price before purchase. Manage or cancel in App Store subscription settings and restore eligible purchases in the app. Privacy Policy: https://sublimetask.com/privacy/ Terms and Conditions: https://sublimetask.com/terms/ Support: https://sublimetask.com/support/ GTD® and Getting Things Done® are registered trademarks of David Allen Company. Sublime Task is not affiliated with or endorsed by David Allen Company.
Screenshots
Verdict
Principal Task and Sublime Task are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Principal Task sells 2 in-app purchases, starting at $3.99 per month and Sublime Task sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | Principal Task | Sublime Task |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 32 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Zechariah Schwenk | Adrian Guerra Marrero |
In-app purchases
Principal Task
- Monthly Subscription$3.991 Month
- Annual Subscription$29.991 Year
Sublime Task
- Sublime Task PRO7 Days trial$4.991 Month
- Sublime Task Pro7 Days trial$44.991 Year









