Comparison

Tida Tasks vs CalStack

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

Head to head
About

Tida Tasks

Organize your life with simple, intuitive buckets for tasks. Capture ideas instantly, set reminders with natural language, and manage your day without clutter. Enjoy a calm, private, and customizable experience.

Highlights
  • Task buckets for organization
  • Instant task capture
  • Natural language date/time input
  • Intuitive gesture controls
  • Private, on-device data storage
  • Customizable color themes
Read full description

Tida is a task app built on one idea: put things in buckets, and the list stops being a wall. Capture whatever's on your mind into Inbox. Sort it into a bucket when you know where it belongs. Nest subtasks as deep as the job actually goes. Anything with a date shows up in Upcoming, in order, so you can see the week without hunting for it. That's the whole app. No projects inside workspaces inside teams. BUILT FOR IPAD Three panels on one screen: your buckets on the left, the bucket you open beside them, and the task you're working on in a third panel, without anything sliding away. Drag the dividers to the widths you like and they stay that way. On a narrower iPad there are two panels, and the task you open rises from the bottom as a band. Drag it taller when you want the detail and push it back down when you don't. Press and hold a bucket for a quick look inside without leaving where you are. Drag a task onto a bucket in the first panel to move it there. Paste an indented list and it arrives as a task with its subtasks. WHAT YOU GET FOR FREE • Inbox, Upcoming and a bucket of your own • Subtasks, nested as deep as you need • Upcoming, month and week views • Home screen widgets in three sizes • Reminders at the time you set • An app icon badge you can configure — choose what counts • Six themes, light and dark, cream or grey • Add tasks with Siri • Export everything to a file, any time WHAT PREMIUM ADDS $2.99 a month, with 7 days free. • Unlimited buckets — go beyond your Inbox and one free bucket • Calendar sync — your Apple, Google and subscribed ICS calendars, shown beside your tasks in Upcoming • Sync across devices — your buckets on your iPhone, iPad and Mac, kept in step through your own iCloud • iCloud backups — save a moment you can come back to before a big change, and restore it later YOUR TASKS ARE YOURS There is no Tida account and no Tida server. We never see your tasks. On the free plan everything stays on your device. With Premium it syncs through your own iCloud, held by Apple under your Apple ID — not by us. We have no way to read any of it. No analytics. No advertising. No third-party tracking of any kind. Calendar access is read-only and optional. Tida never creates, edits or deletes anything in your calendar, and calendar information is never sent anywhere. SUBSCRIPTION DETAILS Tida Premium is an auto-renewing monthly subscription at $2.99, after a 7-day free trial. Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple ID settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://tidaapp.com/privacy

About

CalStack

Features
Read full description

CalStack is a personal command center for your calendar, email, tasks, notes, contacts, and AI assistant. Built for people who live across meetings, travel, family schedules, projects, and inboxes, CalStack brings the day into one focused view instead of scattering it across apps. See your day, upcoming week, pinned events, meetings, reminders, and time zones in a single dashboard. Use Start Day, Check In, and Wind Down rituals to turn your calendar, email, tasks, and notes into practical daily context. CalStack also includes an AI chatbot that can work with your local app context, including calendar events, synced notes, processed email, contacts, and saved preferences. You can connect supported AI providers or local model servers depending on your setup. Key features: • Unified calendar dashboard • Day, week, month, quarter, year, and list calendar views • Pinned and starred calendar events • Time zone dashboard with time scrubber • AI-assisted Start Day, Check In, and Wind Down workflows • Email sync and searchable email context • Brain notes and memory layer • Contact tracking • Meeting and video link support • Local model support for privacy-focused workflows • iCloud sync for supported app data • Native iPhone, iPad, and Mac layouts CalStack is designed to help you understand what matters today, prepare for what is coming next, and keep useful context close without turning your day into another inbox.

Screenshots

Tida Tasks4 screens
CalStack4 screens

Verdict

The call

The clearest difference is price: Tida Tasks at Free against CalStack's $9.99. CalStack's advantage is in-app purchases (none vs 1). On update cadence, 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

Tida Tasks is free to download; CalStack costs $9.99 up front. Tida Tasks sells 1 in-app purchase, starting at $2.99 per month. CalStack asks for nothing beyond the download.

UpkeepUpdate frequency

Tida Tasks ships an update every 6 days, CalStack every 5 days. The most recent releases landed on October 11, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 7 level
Tida Tasks versus CalStack: the parameters behind the verdict, then further details
ParameterTida TasksCalStack
PriceFree — better$9.99
Rating5.0 (4 ratings) — better—
Number of ratings4 — better—
Update frequencyEvery 6 daysEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad, MaciPhone, iPad, Mac, Apple Watch — better
Requires iOS17.0 — better18.0
Further details — not scored
Size10 MB20 MB
Age rating4+4+
DeveloperDaoud MansourPick Two Productions Inc

In-app purchases

1 purchases

Tida Tasks

Subscriptions1
  • Tend Premium7 Days trial$2.991 Month
None

CalStack

No in-app purchases

Questions

Is Tida Tasks free?
Tida Tasks is free to download, with in-app purchases available.
Is CalStack free?
CalStack costs $9.99, with no in-app purchases.
Do Tida Tasks or CalStack have ads?
Neither Tida Tasks nor CalStack shows ads.
Which is updated more often, Tida Tasks or CalStack?
Tida Tasks ships an update every 6 days, and CalStack every 5 days. Most recently, Tida Tasks was updated on October 11, 2026 and CalStack on October 9, 2026.

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