Comparison

DoE Toolkit vs 4.Do

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

Head to head
About

DoE Toolkit

Features
Read full description

The DoE Toolkit provides designer tools that allow you to generate classic experimental designs for the following methodologies: Screening: Full Factorial and Fractional Factorial Response Surface: Central Composite and Box-Behnken Mixture Orthogonal In addition, the DoE Toolkit includes an optimizer tool, which allows you to find an optimal subset of runs based on a design already generated using one of the designer tools. The DoE Toolkit allows you to augment any design by randomizing, replicating, and/or blocking. You can also add central points as well as axial points. You can control the way in which a generated design is displayed in the usual ways, by displaying factor levels as values or as factor level indices. Unique to the DoE Toolkit , you can also assign colors to factor levels and display a generated design using colors to represent factor levels. You can export any generated design to text (comma-separated value form), thereby making it easy to import your design into any spreadsheet or statistical analysis app.

About

4.Do

This app helps you organize and prioritize tasks using the Eisenhower Matrix. Break down projects, set reminders, and collaborate with others to boost your productivity and achieve your goals.

Highlights
  • Eisenhower Matrix 4-Quadrant organization
  • Focused Mode for specific quadrants
  • Subtasks and checklists
  • Task attachments (photos)
  • Smart reminders and recurring tasks
  • Seamless multi-device sync
  • Collaboration features
Features
Read full description

Boost Your Productivity with 4.Do – The Eisenhower Matrix Task Organizer Tired of feeling overwhelmed? Struggling to decide what to work on first? 4.Do helps you focus on what truly matters with the Eisenhower Matrix, the prioritization method featured in Dr. Stephen R. Covey's The 7 Habits of Highly Effective People. 4.Do is your checklist and task management tool, empowering you to organize, prioritize, and tackle goals with ease. Not sure which quadrant a task belongs in? Let on-device AI suggest it. Capture tasks by voice, from a photo, with Siri, or straight from a notification, then see your week at a glance in Calendar view. With 4.Do Cloud, everything stays in sync across iPhone, iPad, Mac, and other platforms. Key Features 4-Quadrant Matrix: Visualize and prioritize tasks by urgency and importance. On-Device AI Suggestions: Type a task and 4.Do recommends which quadrant it belongs in. Runs entirely on your device, so your tasks never leave it. Capture Anywhere: Add tasks by voice, scan them from a photo or screenshot, or use Quick-Add right from a notification. Siri & Spotlight: Add, find, and complete tasks by voice or from your home screen search. Calendar View: See your tasks grouped by due date so nothing sneaks up on you. 4.Do Cloud: Sync across all your Apple devices and other platforms. Focused Mode: Zoom in on a single quadrant to work without distraction. Subtasks & Checklists: Break projects into actionable steps and track progress. Reminders & Recurring Tasks: Stay ahead of deadlines and build lasting habits. Smart Search: Fuzzy matching finds your task even if you misspell it. Filters & Sorting: Organize your to-do list by priority, due date, or custom tags. Attachments: Add photos for context. Collaboration: Share lists and tasks with others. Make It Yours: Rename quadrants, choose color tones, adjust contrast, pick empty-state animations, and add widgets. Your Productivity, Simplified Whether you're tackling errands, managing a checklist, planning long-term goals, or building daily habits, 4.Do keeps you focused and efficient, helping you achieve more in less time while staying aligned with your priorities. Start Today Download 4.Do and take control of your tasks, time, and goals. 4.Do is free, with a Premium upgrade for full access to all features. Subscription plans: – Monthly – $4.99/month – Yearly – $29.99/year The subscription automatically renews unless auto-renewal is turned off at least 24 hours before the end of the current period. Payment will be charged to your iTunes account at confirmation of purchase. Account will be charged for renewal within 24 hours of the end of the current period, and the cost of the renewal will be provided. Subscriptions may be managed by the user. Auto-renewal may be turned off by going to the user's Account Settings after purchase. No cancellation of the current subscription is allowed during active subscription period. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication. For more information: Terms of Use - https://www.4do.app/about/termsandconditions/ios Privacy Policy - https://www.4do.app/about/privacy-policies/ios

Screenshots

DoE Toolkit4 screens
4.Do4 screens

Verdict

The call

The clearest difference is price: 4.Do at Free against DoE Toolkit's $9.99. 4.Do also leads on update cadence (every 5 days vs every 21 months). DoE Toolkit's advantage is in-app purchases (none vs 6) and iOS requirement (14.5 vs 26.0). On ads 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

4.Do is free to download; DoE Toolkit costs $9.99 up front. 4.Do sells 6 in-app purchases, starting at $1.99 per month. DoE Toolkit asks for nothing beyond the download.

UpkeepUpdate frequency

DoE Toolkit ships an update every 21 months, 4.Do every 5 days. The most recent releases landed on October 9, 2026 and October 13, 2026 respectively.

Scorecard4 real differences · 6 level
DoE Toolkit versus 4.Do: the parameters behind the verdict, then further details
ParameterDoE Toolkit4.Do
Price$9.99Free — better
Rating—4.9 (17 ratings) — better
Positive reviews—90.0% of reviews
Number of ratings—17 — better
Update frequencyEvery 21 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS14.5 — better26.0
Further details — not scored
Size13 MB160 MB
Age rating4+4+
DeveloperKal-El SoftwareAyodeji Shoola

In-app purchases

None

DoE Toolkit

No in-app purchases

6 purchases

4.Do

Subscriptions6
  • Monthly7 Days trial$1.991 Month
  • Monthly7 Days trial$4.991 Month
  • Monthly Premium$4.991 Month
Show 3 more
  • Yearly14 Days trial$19.991 Year
  • Yearly Premium$29.991 Year
  • Yearly7 Days trial$29.991 Year

Questions

Is DoE Toolkit free?
DoE Toolkit costs $9.99, with no in-app purchases.
Is 4.Do free?
4.Do is free to download, with in-app purchases available.
Do DoE Toolkit or 4.Do have ads?
Neither DoE Toolkit nor 4.Do shows ads.
Which is updated more often, DoE Toolkit or 4.Do?
DoE Toolkit ships an update every 21 months, and 4.Do every 5 days. Most recently, DoE Toolkit was updated on October 9, 2026 and 4.Do on October 13, 2026.

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