Comparison

Three Todo vs OneTask

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

Head to head
About

Three Todo

This task management app focuses on simplicity by presenting only three tasks at a time. It offers three actions: Done, Defer, or Drop, to help users manage their to-do list without added stress or complexity.

Highlights
  • Focus on 3 tasks at a time
  • Stress-free task management
  • Action tasks: Done, Defer, or Drop
  • Minimalist and non-intrusive design
  • Prioritizes tasks based on user actions
Features
Read full description

THREE: Made for procrastinators by procrastinators. The Refreshingly Simple Stress Free Todo List. THREE is designed to be a minimal task assistant that is non intrusive. Traditional todo lists add stress and complexity by making YOU track, categorize, and prioritize tasks. They're digital task masters that nag and confuse you until you give up in frustration. They punish you with incessant notifications when you're overdue on a task (which you would probably ignore anyways). THREE changes the way you manage tasks. Tasks go in. THREE will present you with three and only three tasks at any given time. As you deal with them, we'll keep track and tell you how you're doing. There are only three ways to action a task - Done, Defer, or Drop. When you are done with a task, it falls off your list. If you make a mistake - don't sweat it. Next time the task you entered erroneously appears in the list , just Drop it - we won't hold it against you. If you're looking at a task that you just don't want to deal with, Defer it. This tells us that a particular task is unpleasant and it gets prioritized lower. THREE isn't designed to keep you on top of every facet of your life. No meaningless trophies or achievements. Rather, THREE will slowly but surely change the course of your life and help point you in the right direction by keeping track of the stuff that matters to you and presenting them to you in a manageable fashion. THREE: Made for procrastinators by procrastinators.

About

OneTask

Features
Read full description

Stop juggling endless lists. Focus on one thing at a time. OneTask is an ADHD-friendly, minimalist daily planner that shows you the single most important task right now. Everything else waits its turn. No overwhelm. No guilt. Just clarity. Today only. No future dates. You can't push tasks to tomorrow. If it matters, do it today. This one rule breaks procrastination at the root. Built for ADHD and neurodivergent minds. Long to-do lists freeze you; one clear task gets you moving. OneTask removes extra choices, deadline pile-ups, and visual noise - the exact things that make traditional planners fail for ADHD brains. Private by design. No accounts. No sign-up. No distractions. Just open the app and start. Your data stays on your device - always. End your day with a streak. Every night, see a clean summary of what you completed. Build a daily habit with weekly and monthly reports that show your real routine. Free forever. 3 tasks a day, no catch. Most people don't need more than three meaningful tasks. Add your three and go. KEY FEATURES - Daily agenda - today's tasks only, zero clutter - Habit tracker - streak tracking to stay consistent - Smart reminder - notifies you at the right time - Home screen widget - no need to open the app - Schedule summary - weekly & monthly reports - Works offline - no account, no sign-up - Dark mode & 35 languages supported - Your data stays on device - always private Research shows multitasking reduces productivity by up to 40%. OneTask solves this at the root. Minimal design. Maximum focus. Privacy Policy: https://erkarslan.github.io/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Three Todo4 screens
OneTask4 screens

Verdict

The call

The clearest difference is price: OneTask at Free against Three Todo's $0.99. OneTask also leads on update cadence (fortnightly vs every 12 months). Three Todo's advantage is in-app purchases (none vs 2). On 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

OneTask is free to download; Three Todo costs $0.99 up front. OneTask sells 2 in-app purchases, starting at $0.99 per month. Three Todo asks for nothing beyond the download.

UpkeepUpdate frequency

Three Todo ships an update every 12 months, OneTask fortnightly. The most recent releases landed on November 6, 2026 and October 28, 2026 respectively.

Scorecard3 real differences · 7 level
Three Todo versus OneTask: the parameters behind the verdict, then further details
ParameterThree TodoOneTask
Price$0.99Free — better
Rating4.9 (16 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings16 — better—
Update frequencyEvery 12 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS17.616.0 — better
Further details — not scored
Size9 MB39 MB
Age rating9+4+
DeveloperJeffrey LaiARZU ARSLAN

In-app purchases

None

Three Todo

No in-app purchases

2 purchases

OneTask

Subscriptions2
  • One Task Pro - Monthly$0.991 Month
  • One Task Pro - Yearly$2.991 Year

Questions

Is Three Todo free?
Three Todo costs $0.99, with no in-app purchases.
Is OneTask free?
OneTask is free to download, with in-app purchases available.
Do Three Todo or OneTask have ads?
Neither Three Todo nor OneTask shows ads.
Which is updated more often, Three Todo or OneTask?
Three Todo ships an update every 12 months, and OneTask fortnightly. Most recently, Three Todo was updated on November 6, 2026 and OneTask on October 28, 2026.

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