ToDue vs Stack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ToDue
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The reminder that won't let go. Most reminders ping once and vanish. The ones that matter deserve better. ToDue keeps nudging you—again and again—until you actually mark it done or push it to later. HOW IT WORKS • Type it in two seconds. "Call the dentist tomorrow 9am" — ToDue reads the date, time and repeat for you. • It comes back. Pick how insistent each reminder is, from a gentle tap to relentless nudging. • Always in sight. Active reminders live on your Lock Screen and in the Dynamic Island, with a live countdown to the next nudge—act right from there. • Done in one tap. Complete, snooze, or reschedule (in 1 hour, tonight, tomorrow) without opening the app. NOT ANOTHER TO-DO APP No projects. No folders. No tags. No endless lists to manage. ToDue does one thing—make sure you don't forget what matters—and does it beautifully. FREE • Up to 5 active reminders • Smart natural-language input • Simple, reliable alerts PRO — one-time purchase, no subscription Pro is free for your first 7 days—no card, nothing to cancel. Try the full escalation before you decide. • Unlimited reminders • Relentless escalation that won't quit • Live Activity & Dynamic Island • Apple Watch app & complications • Custom alert sounds PRIVACY Your reminders sync privately through your own iCloud. No account, no tracking, no data collected by us. ToDue. Set it once. It won't let you forget.
Stack
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Stack is a project planner built the way a Mac app should be. Lay work out on boards, see the same work on a calendar, and watch it run on a timeline — on iPhone, iPad and Mac, with everything synced privately through your own iCloud. BOARDS THAT MOVE Lists and tasks you can drag anywhere. Colour-coded labels, cover images, checklists, due dates, priorities, attachments and comments. Give a board a key and every task gets a number you can quote — HRB-14. THREE WAYS TO SEE THE SAME WORK Columns when you are running the work. One long list when you are working through it. A month calendar when you need to know what lands when — and a timeline of lanes and bars when you need to see the whole project at once. PLAN ITEMS, NOT JUST TASKS "Design freeze". "Launch". Dates a project has to remember that are nobody's to-do. They sit on the calendar and the timeline beside the work without pretending to be tasks. TODAY, THIS WEEK, FLAGGED Saved views that cut across every board, so you can start the day in one place instead of opening four boards to find out what is due. FIND ANYTHING Full-text search across every board — titles, descriptions, checklists and attachment names — with the board and list each result came from. SHARE A BOARD Invite someone with a link. They see your board, you see their edits, and it all runs on iCloud sharing. No accounts to create, no seats to buy. EVERYWHERE YOU WORK Quick add from anywhere. A menu bar item on Mac. A share extension so anything you are looking at can become a task. A home-screen widget for what is due today. Shortcuts and Siri support for the rest. WORKS OFFLINE, ALWAYS Every read and every write happens on your device first. Sync catches up when the network does. A plane, a basement, a bad hotel — the app does not care. PRIVATE BY DESIGN No account. No server. No tracking. No ads. Your boards live on your device and sync through your personal iCloud — nobody else can see them, including us. Free, with no subscription and nothing to unlock. Built natively for iPhone, iPad and Mac, localized into six languages, and designed to feel at home on every screen size.
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Verdict
The clearest difference is in-app purchases: Stack at none against ToDue's 1. On price, 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
Both are free to download. ToDue sells 1 one-off in-app purchase. Stack asks for nothing beyond the download.
| Parameter | ToDue | Stack |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Mac |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Tournillon | SouthIndus Labs |
In-app purchases
ToDue
- ToDue Pro$9.99
Stack
No in-app purchases









