Comparison

Doo vs Quartrix

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

Head to head
About

Doo

This app helps you overcome procrastination by breaking down tasks into manageable digital cards. Its unique card-based interface and focus on one task at a time promote productivity and habit building. It offers various task types, scheduling options, and cross-device syncing.

Highlights
  • Card-based task interface
  • Customizable task groups
  • Open-ended, calendar, and location-based tasks
  • Share extension for creating tasks from other apps
  • Customizable task scheduling and alerts
  • iCloud sync across devices
  • Task collaboration
Features
Read full description

Become a more productive you, one card at a time. WHY DOO? It’s easy to procrastinate your to-do list without a clear first step. Tasks with large goals can feel impossible to finish. Doo helps you procrastinate less. Your reminders become cards that are easy to start and easy to finish. The streamlined edit screen encourages you to create tasks that can fit on a digital index card. Each card shows up in a stack — instead of a list — so you can focus on one thing at a time. BUILD BETTER HABITS Pick a few tasks each day and snooze the rest. Doo helps you create more consistent, sustainable habits. Reduce your anxiety and become a more productive you, one card at a time. *** 2021 Webby Award Nominee *** Best App - Work & Productivity *** 2021 Webby Award Honoree *** Best App User Interface REVIEWS “I absolutely love this app... *incredibly* satisfying...” – Doo 2 Review, Buzzfeed “There’s just enough guilt involved in hitting snooze that I often just complete the task. That’s the point." – WIRED “Doo is a beautiful way to get things done without stressing yourself out.” – Doo 2 Review, The Next Web FEATURE HIGHLIGHTS • Be more productive with a unique, card-based interface • Separate cards into custom groups • Create open-ended, calendar, or location-based tasks • Create tasks within other apps with the share extension • Schedule tasks with custom intervals and alerts • Sync with iCloud across iOS and Mac devices • Collaborate on tasks with other Doo users (requires iCloud) • Support for VoiceOver, Dynamic Text, and keyboard shortcuts • Stay on task with Home Screen & Lock Screen widgets • Complete or snooze tasks from notifications • Drag and drop text, locations, and URLs to create tasks • Screen lock with FaceID, TouchID, or passphrase • Create and complete reminders with Siri • Multitask with Split View and Slide Over

About

Quartrix

Features
Read full description

Every small choice adds up to a balanced life. Find your perfect equilibrium with Quartrix. Simple and Intuitive Task Management # Keep all your tasks in one place - Easily classify by importance and urgency - Get guidance from a friendly classification wizard - See your work/play/relationship/health balance at a glance # Find Your Personal Balance - Track energy levels and engagement for completed tasks - Discover your patterns through data - Find your sustainable balance point - Experience growth without burnout # Perfect For - Freelancers juggling multiple roles - Professionals seeking work-life harmony - Students balancing studies and personal life - Anyone feeling overwhelmed or anxious - Those wanting to reclaim control of their time # Convenient Features - Seamless calendar integration for unified scheduling - Focus mode to secure deep work time

Screenshots

Doo4 screens
Quartrix4 screens

Verdict

The call

The clearest difference is price: Quartrix at Free against Doo's $4.99. On update cadence, 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

Quartrix is free to download; Doo costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Doo ships an update every 2 weeks, Quartrix weekly. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

Scorecard1 real difference · 9 level
Doo versus Quartrix: the parameters behind the verdict, then further details
ParameterDooQuartrix
Price$4.99Free — better
Rating4.4 (39 ratings) — better—
Positive reviews55.2% of reviews—
Number of ratings39 — better—
Update frequencyEvery 2 weeksWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS17.617.5 — better
Further details — not scored
Size17 MB1 MB
Age rating4+4+
DeveloperCiarlo Software, LLCOOMOOL CREATIVE

In-app purchases

None

Doo

No in-app purchases

None

Quartrix

No in-app purchases

Questions

Is Doo free?
Doo costs $4.99, with no in-app purchases.
Is Quartrix free?
Quartrix is free to download, with no in-app purchases.
Do Doo or Quartrix have ads?
Neither Doo nor Quartrix shows ads.
Which is updated more often, Doo or Quartrix?
Doo ships an update every 2 weeks, and Quartrix weekly. Most recently, Doo was updated on November 3, 2026 and Quartrix on October 27, 2026.

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