Comparison

Just Do it vs 3by4

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

Head to head
About

Just Do it

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A simple and practical ToDoList App. Own your lives, arrange your plans, and better life.

About

3by4

This app helps you break down large goals into actionable daily, weekly, monthly, and yearly plans. A virtual assistant guides you through habit formation and task management, offering friendly reminders and progress tracking.

Highlights
  • Goal breakdown into actionable plans
  • Habit tracking with reminders
  • Daily task management
  • Focus timer
  • Home screen widgets
  • AI-powered planning assistance
Features
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3by4 turns your goals into a plan for your day, week, month and year. Timi, your little planning buddy, helps you follow through. Tell Timi what you want, from a big goal to a small daily habit. Timi turns it into a plan and keeps you on track until it's done. GOALS THAT BECOME PLANS • Tell Timi a goal in your own words, like getting healthier or saving for a trip • Timi asks a few questions, then lays out the steps across your year • Change anything you like, then add the plan with one tap HABITS THAT STICK • Daily and weekly habits that repeat on their own • Reminders and alarms at the right moment • Friendly check-ins from Timi on the days you need a nudge • Progress rings that fill as you keep going, and Timi celebrates with you YOUR DAY, PLANNED • Today's tasks right next to your calendar's meetings • Say a task out loud and Timi adds it for you • A focus timer for the work that matters • Home Screen widgets for today at a glance ALL YOUR TIME IN ONE PLACE 3by4 keeps four sizes of time: day, week, month and year. Look back at yesterday, act on today and get ready for tomorrow. That's the 3by4 method, and Timi does the sorting for you. YOURS No account needed. Your tasks stay on your iPhone, with iCloud backup. Planning with Timi uses AI, and the app tells you what is shared before anything is sent. TRY IT FREE Start with a 7-day free trial, and Timi will remind you before it ends. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings. Privacy Policy: https://3by4.com/privacy Terms of Use: https://3by4.com/terms

Screenshots

Just Do it4 screens
3by44 screens

Verdict

The call

The clearest difference is in-app purchases: Just Do it at none against 3by4's 3. Just Do it also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 3 months). On price, 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. 3by4 sells 3 in-app purchases, starting at $6.99 per 7 days. Just Do it asks for nothing beyond the download.

UpkeepUpdate frequency

Just Do it ships an update every 3 weeks, 3by4 every 3 months. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Just Do it versus 3by4: the parameters behind the verdict, then further details
ParameterJust Do it3by4
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 3 weeks — betterEvery 3 months
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone
Requires iOS16.0 — better16.4
Further details — not scored
Size31 MB110 MB
Age rating4+4+
Developer剑平 沈Karimulla Mohammed

In-app purchases

None

Just Do it

No in-app purchases

3 purchases

3by4

Subscriptions3
  • 3by4 Premium Weekly$6.997 Days
  • 3by4 Premium Monthly$12.991 Month
  • 3by4 Premium Yearly7 Days trial$39.991 Year

Questions

Is Just Do it free?
Just Do it is free to download, with no in-app purchases.
Is 3by4 free?
3by4 is free to download, with in-app purchases available.
Do Just Do it or 3by4 have ads?
3by4 shows ads; Just Do it does not.
Which is updated more often, Just Do it or 3by4?
Just Do it ships an update every 3 weeks, and 3by4 every 3 months. Most recently, Just Do it was updated on November 1, 2026 and 3by4 on October 31, 2026.

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