Principal Task vs Shrimpodoro
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
Shrimpodoro
This productivity app uses a unique approach to focus by requiring users to complete squats to unlock subsequent work intervals. It gamifies productivity with collectible tomatoes and landmark badges earned through focused work and physical activity.
- Squat-based Pomodoro timer
- Front camera rep counting
- Collectible tomatoes for focus
- Landmark badges for squats
- Home/Lock Screen widgets
- Siri integration
- Day, week, month, year stats
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Your pomodoro breaks are making you tired. Five minutes of scrolling turns into forty, and you come back curled up like a shrimp. Shrimpodoro is a pomodoro timer with one rule: your next pomodoro stays locked until you squat. HOW A ROUND WORKS • Focus for 5–120 minutes (25 by default). A tiny hand-drawn version of you types along and slowly curls into a shrimp. • Time's up. The next pomodoro is locked. • Do 5, 10 or 20 squats. Your front camera counts every rep right on your iPhone. Video is never recorded or uploaded, and it works up close, even with your feet out of frame. • A pink tomato drops into your pile, and the next round unlocks. TWO THINGS TO COLLECT • Tomatoes for focus: finish a round and squat for a pink tomato. Skip or give up and it's a black one. They pile up on your home screen all day. • Landmarks for squats: every squat climbs 1 meter. Unlock 38 badges, from a little house to the Eiffel Tower, Mt. Fuji and Everest (8,849 m). ALSO • Home Screen and Lock Screen widgets, StandBy, and a Dynamic Island timer • Siri: "Start a pomodoro with Shrimpodoro" or "Add 10 minutes in Shrimpodoro" • Day, week, month and year stats • Share your day as an image or a short video • No account, no sign-up. Your history stays on your iPhone. WHY SQUATS Short movement breaks during long sitting are linked to less fatigue and better mood, and a minute of squats every 20 minutes helped keep brain blood flow from dropping during hours of sitting. Standing up alone isn't enough. Moving is. FREE AND PRO Free: unlimited pomodoros and all 38 landmark badges. Shrimpodoro Pro: month and year reports, focus insights (your golden hour, the minute you tend to quit, and whether you’re improving), sharing without a watermark, and the big Tomato Pile and Lock Screen widgets. Monthly, yearly or a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage them in your Apple ID settings. Terms: https://www.shrimpodoro.com/terms Privacy: https://www.shrimpodoro.com/privacy Shrimpodoro is not a medical app. Squat only if it's safe for you.
Screenshots
Verdict
The clearest difference is update cadence: Shrimpodoro at every 2 days against Principal Task's every 3 months. Shrimpodoro also leads on ratings volume (4 vs 1). Principal Task's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, rating, ads and in-app purchases 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 Shrimpodoro sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 5.0 for Principal Task against 5.0 for Shrimpodoro. Both are backed by a comparable volume of ratings — 1 and 4 respectively.
Principal Task ships an update every 3 months, Shrimpodoro every 2 days. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.
| Parameter | Principal Task | Shrimpodoro |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (4 ratings) |
| Number of ratings | 1 | 4 — better |
| Update frequency | Every 3 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 32 MB | 81 MB |
| Age rating | 4+ | 4+ |
| Developer | Zechariah Schwenk | 千皓 罗 |
Customer experience
Principal Task
Shrimpodoro
In-app purchases
Principal Task
- Monthly Subscription$3.991 Month
- Annual Subscription$29.991 Year
Shrimpodoro
- Pro Monthly$3.991 Month
- Pro Yearly$8.991 Year
- Pro Lifetime$14.99









