Comparison

To Do Machine vs Trayzero

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

Head to head
About

To Do Machine

Design your ideal productivity system with this highly customizable task manager. It adapts to your unique workflow using natural language commands and AI organization. Seamlessly syncs across Mac and iOS devices.

Highlights
  • Natural language task creation
  • AI-powered organization
  • Customizable views (list, kanban, calendar)
  • Invent custom statuses and fields
  • Two-way calendar sync
  • Instant cross-device sync
  • Personalized productivity system assessment
Features
Read full description

The only productivity app designed just for you. Most to-do apps make you bend to their rules. To Do Machine flips the workshop on its head — open the back panel, swap the parts, paint it your color. Talk to it in plain English and watch your task inbox, your projects, and your entire workflow rebuild themselves in real time. Built natively for Mac and iOS. Perfectly in sync. — WHO IT'S FOR — For the people who've tried every to-do app and bounced off them all. For the ones who keep building systems in Notion, then abandoning them. For anyone whose brain works a specific way and is tired of apps that don't. To Do Machine isn't another opinionated workflow. It's a workshop where you build the one that fits you. — DESIGN IT YOURSELF — Tell To Do Machine what you want and it remakes the app around you. "Make the inbox darker and put due dates on the right" — done. Switch any project to list, kanban, calendar, focus, or blueprint view. Invent your own statuses, fields, and automations, project by project. Every tweak syncs to all your devices instantly. — AI THAT DOES THE ORGAINZING — Just say what's on your mind. To Do Machine writes the tasks, breaks them into projects, sets reminders, and finds time on your calendar — no tapping the + button (if you don't want to). "Plan my Q3" → full project with milestones, weekly check-ins, and time blocks. Auto-triage your inbox: priority, due dates, parent project. Orgainize your tasks in bulk: "Complete all of my overdue tasks and let's start fresh." — CALENDAR IN, DAY OUT — Connect Apple or Google Calendar and your tasks thread themselves between your meetings. Two-way sync with Apple or Google Calendar. Time-blocking that respects your meetings, focus blocks, and breaks. Move a meeting and your tasks move with it. — INSTANTLY SYNCED BETWEEN iOS AND MAC — Tasks, projects, and calendars sync in milliseconds. Custom layouts and themes travel with you. Redesign your inbox on Mac at lunch — it's waiting on your iPhone by the time you stand up. — FREE TRIAL AND PRICING — -A free personalized assessment and recommendation of one of nine proven productivity systems. -Start your free 7-day trial (available with an annual subscription) to unlock full usage of To Do Machine, including task management and system customization. After your trial, task management and system customization is only available on a paid plan. -Pricing starts at $23.99 for three months. -Auto-renewal can be cancelled at any time via Apple subscription settings. Assembled in Brooklyn, NY. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

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.

Highlights
  • 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
Features
Read full description

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

To Do Machine4 screens
Trayzero4 screens

Verdict

The call

The clearest difference is ratings volume: To Do Machine at 11 against Trayzero's 1. Trayzero's advantage is iOS requirement (15.0 vs 17.6). On price, rating, review sentiment 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. To Do Machine sells 6 in-app purchases, starting at $7.99 per month and Trayzero sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for To Do Machine against 5.0 for Trayzero. That said, the two scores are not equally well evidenced: To Do Machine has 11 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

To Do Machine ships an update every 2 weeks, Trayzero monthly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
To Do Machine versus Trayzero: the parameters behind the verdict, then further details
ParameterTo Do MachineTrayzero
PriceFreeFree
Rating5.0 (11 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings11 — better1
Update frequencyEvery 2 weeks — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, MaciPhone, iPad, iPod — better
Requires iOS17.615.0 — better
Further details — not scored
Size39 MB39 MB
Age rating17+4+
DeveloperElectric Lantern LLCFeipeng Liu

Customer experience

To Do Machine

All ratings9 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Trayzero

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

6 purchases

To Do Machine

Subscriptions6
  • Standard7 Days trial$7.991 Month
  • To Do Machine Max7 Days trial$19.991 Month
  • Standard - 3 Months$23.993 Months
Show 3 more
  • Welcome Price7 Days trial$44.991 Year
  • To Do Machine - Annual7 Days trial$69.991 Year
  • To Do Machine Max - Annual7 Days trial$199.991 Year
4 purchases

Trayzero

Subscriptions2
  • Supporter (Monthly)$0.991 Month
  • Supporter (Yearly)$7.991 Year
One-time2
  • Small Tip$1.99
  • Large Tip$9.99

Questions

Is To Do Machine free?
To Do Machine is free to download, with in-app purchases available.
Is Trayzero free?
Trayzero is free to download, with in-app purchases available.
Which has better reviews, To Do Machine or Trayzero?
To Do Machine and Trayzero are both rated 5.0 out of 5 on the App Store, from 11 and 1 ratings respectively.
Do To Do Machine or Trayzero have ads?
Neither To Do Machine nor Trayzero shows ads.
Which is updated more often, To Do Machine or Trayzero?
To Do Machine ships an update every 2 weeks, and Trayzero monthly. Most recently, To Do Machine was updated on November 5, 2026 and Trayzero on October 31, 2026.

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