Comparison

Planfect vs CalStack

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

Head to head
About

Planfect

Features
Read full description

Planfect is your AI day planner. Tell it what's on your plate — by text or voice — and it builds a realistic schedule around your routine, commute, and habits. No forms. No dragging blocks around a grid. Just say "dentist Friday afternoon, groceries this weekend, finish the report this week" and Planfect works out the when: it fits things around your work and sleep, adds real travel time so you leave on time, and asks only when it's truly unsure. WHAT YOU CAN DO • Plan by voice or text — fire off a quick thought, get a full day back • Smart scheduling around your routine, sleep, and your real calendar • Real travel times, so a 2:00 appointment means leaving at the right minute • Recurring habits, gentle reminders, and Apple Calendar sync • A clean day / week / month timetable, plus insights into where your time goes • Home- and lock-screen widgets for what's next, at a glance Planfect learns how you like your days — workouts in the morning, focused work when you're sharp — and plans around it. Tell it your plans. It builds your day.

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

Planfect4 screens
CalStack4 screens

Verdict

The call

The clearest difference is price: Planfect at Free against CalStack's $9.99. CalStack's advantage is update cadence (every 5 days vs fortnightly) and device support (4 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Planfect is free to download; CalStack costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Planfect ships an update fortnightly, CalStack every 5 days. The most recent releases landed on October 1, 2026 and October 9, 2026 respectively.

Scorecard3 real differences Ā· 3 level
Planfect versus CalStack: the parameters behind the verdict, then further details
ParameterPlanfectCalStack
PriceFree — better$9.99
Update frequencyFortnightlyEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad, Mac, Apple Watch — better
Requires iOS17.0 — better18.0
Further details — not scored
Size5 MB20 MB
Age rating4+4+
DeveloperåÆč 闫Pick Two Productions Inc

In-app purchases

None

Planfect

No in-app purchases

None

CalStack

No in-app purchases

Questions

Is Planfect free?
Planfect is free to download, with no in-app purchases.
Is CalStack free?
CalStack costs $9.99, with no in-app purchases.
Do Planfect or CalStack have ads?
Neither Planfect nor CalStack shows ads.
Which is updated more often, Planfect or CalStack?
Planfect ships an update fortnightly, and CalStack every 5 days. Most recently, Planfect was updated on October 1, 2026 and CalStack on October 9, 2026.

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