Three Todo vs OneTask
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
OneTask
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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
Verdict
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
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.
Three Todo ships an update every 12 months, OneTask fortnightly. The most recent releases landed on November 6, 2026 and October 28, 2026 respectively.
| Parameter | Three Todo | OneTask |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.9 (16 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 16 — better | — |
| Update frequency | Every 12 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Requires iOS | 17.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 9 MB | 39 MB |
| Age rating | 9+ | 4+ |
| Developer | Jeffrey Lai | ARZU ARSLAN |
In-app purchases
Three Todo
No in-app purchases
OneTask
- One Task Pro - Monthly$0.991 Month
- One Task Pro - Yearly$2.991 Year









