Just Do Three vs Trayzero
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Just Do Three
Focus on what truly matters by selecting three key priorities for the day. Once these are completed, the day is considered a success. This app offers a simple, clear, and achievable approach to productivity without overwhelming task management features.
- Select three daily priorities
- Focus on task completion
- Track progress and build momentum
- Schedule tasks up to a week ahead
- Import tasks from a file
- Productivity analytics
- Recurring tasks
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Trying to do everything means finishing nothing. Just Do Three helps you focus on what actually matters today. Instead of managing an overwhelming list of tasks, you choose three priorities for the day. That’s it. When those three things are done, the day is a success. Simple. Clear. Achievable. Just Do Three is designed for people who want a lightweight productivity tool without complicated systems, subscriptions, or endless task management features. How it works • Pick the three most important things you want to accomplish today • Focus on completing those tasks • Track your progress and build momentum Premium Features Upgrade to unlock powerful insights and planning tools: • Schedule tasks up to a week ahead • Import tasks from a file • Day, week, month, and year productivity analytics • Recurring weekly and monthly tasks • Stretch goal tracking • “Most Avoided Tasks” insights • Add tasks from a paper list or photo via OCR. • Add tasks to your iPhone calendar as tasks or calendar entries • Have a "work list" and a "personal list" and track them separately. • Export your list as a csv for use elsewhere. Built for simplicity • No clutter • No complicated productivity systems • No endless lists Just pick three things. And do them.
Trayzero
This app implements David Allen's Getting Things Done (GTD) methodology for task management. It offers a streamlined inbox, clarification flow, and organization into canonical GTD lists. Features include reminders, voice capture, and on-device data storage for enhanced privacy.
- GTD inbox and capture
- Clarify flow for processing tasks
- Organize into GTD lists
- Weekly Review wizard
- Engage tab by context/energy/time
- On-device data storage
- Voice and photo capture
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Trayzero brings David Allen's Getting Things Done (GTD) method to your iPhone. Free, no ads, no account, no sign-up. Your data lives on your device. Always. THE FIVE GTD STEPS, BUILT IN Capture - one tap, anywhere. A floating Capture button on every screen. Share anything from any app straight into your inbox. Voice-to-text for hands-free thoughts. A Home Screen widget for the fastest possible "add to inbox." Clarify - the killer flow. Process Inbox runs you through your captures one at a time, card-stack style. Each card walks the full GTD decision tree: actionable? Two-minute rule? Delegate? Single step or a project? When? Where? You hit inbox-zero faster than you thought possible. Organize - the canonical GTD lists. Inbox, Next Actions, Projects, Waiting For, Someday/Maybe, Calendar, Reference. Plus a real Project type with outcome, next-action warning, and Active / On Hold / Someday / Done / Dropped status. Seven default @-contexts you can extend (@phone, @computer, @errands, @home, @office, @anywhere, @waiting). Areas of Responsibility for the higher altitudes. Reflect - a Weekly Review wizard. A seven-step Friday review walks you through the canonical GTD pass: clear inbox, review next actions, check waiting-for, scan calendar, review someday/maybe, look at projects, set next week's intentions. Daily review supported too. Engage - do now. The Engage tab filters Next Actions by Context, Energy (low / medium / high), and Time Available (under 5m / 15m / 30m / 1h). Pull up the actions that match the moment you're in. REMINDERS THAT ACTUALLY WORK Due-date, defer-until, waiting-for follow-up, and weekly-review nudges fire as system notifications with action buttons - Done, Snooze, Move to Next Actions. Calendar two-way sync mirrors dated items into your system calendar. VOICE, PHOTOS, AUDIO Capture by voice. Attach photos or voice memos to any item. PRIVACY YOU DON'T HAVE TO THINK ABOUT - 100% on-device. SQLite under the hood. - No account, no servers, no analytics. - Crash reporting is opt-in and off by default. - Backup/restore as plain JSON: you own your data, you can take it anywhere. WHO IT'S FOR - GTD practitioners who want a clean, focused app that respects the method. - Anyone tired of cloud-syncing personal task data through someone else's servers. - People who want their tasks where their phone is - and nowhere else. Trayzero is an independent app inspired by the Getting Things Done methodology. It is not affiliated with, endorsed by, or sponsored by David Allen Company. "Getting Things Done" and "GTD" are trademarks of the David Allen Company. Terms of Use (EULA): https://trayzero.app/terms Privacy Policy: https://trayzero.app/privacy
Screenshots
Verdict
The clearest difference is in-app purchases: Just Do Three at none against Trayzero's 4. Trayzero's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, rating, ratings volume and update cadence 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
Both are free to download. Trayzero sells 4 in-app purchases, starting at $0.99 per month. Just Do Three asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Just Do Three against 5.0 for Trayzero. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Just Do Three ships an update every 3 weeks, Trayzero monthly. The most recent releases landed on October 5, 2026 and October 24, 2026 respectively.
| Parameter | Just Do Three | Trayzero |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Freemium | Freemium |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Todd Vallie | Feipeng Liu |
In-app purchases
Just Do Three
No in-app purchases
Trayzero
- Supporter (Monthly)$0.991 Month
- Supporter (Yearly)$7.991 Year
- Small Tip$1.99
- Large Tip$9.99









