Comparison

Doo vs Multi Scanner USB

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

Multi Scanner USB

Features
Read full description

Im klinischen Alltag und bei Studien müssen immer wieder Geräte und Patientendaten für einen definierten Zeitraum miteinander verknüpft werden (Langzeit EKG, 24 Blutdruckmessung, Studien mit Wearables...). Mit der Multi-Scanner App können diese Vorgänge nur problemlos durch Scan des jeweiligen Devices und des Patienten Codes erfolgen. Durch die Scann-Funktion der App, die sowohl QR-Codes als auch EAN-Codes erkennt werden die Verknüpfungen eindeutig und mit Historie inklusive Such-Funktion zuverlässig ermöglicht.

Screenshots

Doo4 screens
Multi Scanner USB4 screens

Verdict

The call

The clearest difference is price: Multi Scanner USB at Free against Doo's $4.99. Multi Scanner USB also leads on update cadence (every 2 days vs every 2 weeks) and iOS requirement (14.0 vs 17.6). On 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

Multi Scanner USB 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, Multi Scanner USB every 2 days. The most recent releases landed on October 15, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 7 level
Doo versus Multi Scanner USB: the parameters behind the verdict, then further details
ParameterDooMulti Scanner USB
Price$4.99Free — better
Rating4.4 (39 ratings) — better—
Positive reviews55.2% of reviews—
Number of ratings39 — better—
Update frequencyEvery 2 weeksEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.614.0 — better
Further details — not scored
Size17 MB1 MB
Age rating4+4+
DeveloperCiarlo Software, LLCMax Eckstein

In-app purchases

None

Doo

No in-app purchases

None

Multi Scanner USB

No in-app purchases

Questions

Is Doo free?
Doo costs $4.99, with no in-app purchases.
Is Multi Scanner USB free?
Multi Scanner USB is free to download, with no in-app purchases.
Do Doo or Multi Scanner USB have ads?
Neither Doo nor Multi Scanner USB shows ads.
Which is updated more often, Doo or Multi Scanner USB?
Doo ships an update every 2 weeks, and Multi Scanner USB every 2 days. Most recently, Doo was updated on October 15, 2026 and Multi Scanner USB on October 7, 2026.

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