Principal Task vs Dobby AI Notes
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
Dobby AI Notes
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Your mind moves fast. Dobby AI Notes keeps up. The AI-powered second brain that captures, organizes, and retrieves everything you know — all in one place. Tired of hunting through piles of notes to find that one insight? With Dobby AI Notes, simply type, speak, paste a URL, or upload a file, and state-of-the-art Gemini AI instantly turns raw input into clear, structured summaries and actionable to-do lists. Your notes work for you — not the other way around. The crown jewel is the conversational RAG chatbot: your own AI assistant that knows everything inside your personal knowledge base. Ask "What did I read about that marketing strategy last week?" and it will semantically search every saved note in real time, surfacing the exact answer with source references — just like having a personal research assistant available 24/7. [Perfect For] • Scattered thinkers and fast-moving minds who lose ideas before they can write them down • Professionals who want automatic meeting notes and action items without lifting a pen • Students who record lectures and need clean, searchable summaries instantly • Researchers and content creators building a curated, queryable knowledge archive • Productivity enthusiasts building a personal knowledge management (PKM) system or second brain [Core Features] • Smart Web Clipping: Paste any URL to strip away ads and clutter, saving a clean Markdown summary directly to your notes • Voice Notes & AI Refinement: Record live audio with real-time transcription, then let Gemini AI extract key points, summaries, and action items automatically • Conversational RAG Chatbot: Semantically search your entire note database with vector search — ask natural language questions and get accurate, cited answers • Home Screen Widgets (1x1): Record voice notes, check/add to-do lists, and quick-create notes in a single tap without opening the app • Guest Login & Easy Account Linking: Try the app immediately without registering and easily link to your Google, Apple, or email account later • Free Premium Ad Credits: Earn premium AI usage credits by watching rewarded ads without an active subscription • Interactive Onboarding: Learn to navigate the app with our brand new step-by-step interactive coachmarks on mobile and web • Organized Knowledge Base: Sort notes into folders and tags, write in Markdown, and manage tasks with built-in to-do checklists • Multi-Format Input: Text, voice, web clips, and file attachments — every format of knowledge, unified in one app • Usage Dashboard: Monitor daily AI token costs and cloud storage in a clear, transparent dashboard Capture your thoughts. Build your knowledge base. Meet your AI assistant. Start with Dobby AI Notes today! Privacy Policy: https://www.dobby-canvas.com/docs/privacy-policy.html Terms of Service: https://www.dobby-canvas.com/docs/terms-of-service.html
Screenshots
Verdict
The clearest difference is ads: Principal Task at none against Dobby AI Notes's shown. Dobby AI Notes's advantage is update cadence (weekly vs every 3 months). On price, in-app purchases, device support and iOS requirement 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
Both are free to download. Principal Task sells 2 in-app purchases, starting at $3.99 per month and Dobby AI Notes sells 5 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Principal Task ships an update every 3 months, Dobby AI Notes weekly. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | Principal Task | Dobby AI Notes |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 32 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | Zechariah Schwenk | Dobby Canvas, Inc. |
In-app purchases
Principal Task
- Monthly Subscription$3.991 Month
- Annual Subscription$29.991 Year
Dobby AI Notes
- Pro Plan (Monthly)14 Days trial$4.991 Month
- AI Credits - Boost S$10.00
- AI Credits - Boost M$50.00
- AI Credits - Boost L$100.00
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- AI Credits - Boost XL$200.00









