Comparison

Principal Task vs Lesson Flo

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

Head to head
About

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.

Highlights
  • Task Velocity score
  • GTD-native structure
  • Due dates and repeating tasks
  • Markdown support
  • Kanban boards
  • Private templates
Features
Read full description

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

About

Lesson Flo

Features
Read full description

Transform your classroom time management with LessonFlo - the elegant, distraction-free timer designed specifically for teachers. WHAT MAKES LESSONFLO DIFFERENT • 100% Ad-Free Experience - Focus on teaching, not ads • Privacy First - No tracking, no data collection, no accounts • Beautiful Design - Clean, professional interface built for the classroom • Landscape Mode - Perfect for projecting or displaying on your desk • Flexible Timing - Adapt on the fly as your lesson evolves POWERFUL FEATURES Create Custom Lesson Plans • Build multi-segment lessons with custom durations • Color-code each activity for visual clarity • Reorder segments with drag-and-drop • Save and reuse your favorite lesson templates Stay on Track, Stay Flexible • Visual timer with progress indicators • Extend time when discussions run long • Skip segments that need less time • Distribute extra time intelligently across remaining activities Perfect for Every Teaching Style • Direct instruction segments • Group work activities • Individual practice time • Transitions and cleanup • Assessment periods STAY ORGANIZED • Calendar view of all your planned lessons • Quick access to upcoming classes • Edit and refine lessons before class • Never lose track of your teaching schedule DESIGNED FOR TEACHERS, BY A TEACHER LessonFlo was created by an educator who understands the challenges of classroom time management. Every feature is thoughtfully designed to help you: • Maintain instructional pace • Keep students engaged • Maximize learning time • Reduce lesson planning stress PREMIUM QUALITY, FREE No subscriptions. No in-app purchases. No ads. We believe great teaching tools should be accessible to every educator. NOVEMBER LAUNCH SPECIAL Download LessonFlo in November and enjoy all premium features completely free. Join thousands of teachers who are transforming their classroom time management. Perfect for: • K-12 teachers • University professors • Tutors and instructors • Homeschool educators • Workshop facilitators Download LessonFlo today and take control of your classroom time!

Screenshots

Principal Task4 screens
Lesson Flo4 screens

Verdict

The call

The clearest difference is in-app purchases: Lesson Flo at none against Principal Task's 2. On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Principal Task sells 2 in-app purchases, starting at $3.99 per month. Lesson Flo asks for nothing beyond the download.

Scorecard1 real difference · 8 level
Principal Task versus Lesson Flo: the parameters behind the verdict, then further details
ParameterPrincipal TaskLesson Flo
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 months—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size32 MB22 MB
Age rating4+4+
DeveloperZechariah SchwenkAndre Burch

In-app purchases

2 purchases

Principal Task

Subscriptions2
  • Monthly Subscription$3.991 Month
  • Annual Subscription$29.991 Year
None

Lesson Flo

No in-app purchases

Questions

Is Principal Task free?
Principal Task is free to download, with in-app purchases available.
Is Lesson Flo free?
Lesson Flo is free to download, with no in-app purchases.
Do Principal Task or Lesson Flo have ads?
Neither Principal Task nor Lesson Flo shows ads.

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