InstaCal vs Task Zero
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
InstaCal
This comprehensive calendar app offers multiple views and integrates events with Apple Reminders. It features natural-language event creation in 12 languages and includes native apps for Mac and Apple Watch with a single purchase.
- Six touch-optimized calendar views
- Integrates events and Apple Reminders
- Natural-language Quick Add in 12 languages
- Native Mac and Apple Watch apps
- Customizable widgets and Live Activities
- One-time purchase, no subscription
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InstaCal is a fast, complete calendar for iPhone and iPad: six views built for touch, your events and Apple Reminders in one agenda, and natural-language Quick Add in 12 languages. One purchase includes native Mac and Apple Watch apps too—no subscription, no platform add-on. ON IPHONE AND IPAD Take the whole calendar with you in six touch-optimized views: Agenda, Day, Week, Month, Quarter and Year. Month and Year scroll continuously, multi-day events draw as banners across the grid, and events, Apple Reminders, weather, moon phases and meeting Join buttons appear together. On iPad, an adaptive multi-pane layout keeps the agenda, calendar and event details visible at once. IN YOUR LANGUAGE InstaCal is fully localized in 12 languages: English, German, French, Spanish, Italian, Dutch, Brazilian Portuguese, Russian, Japanese, Korean, and Simplified and Traditional Chinese. Not only the interface — Quick Add reads dates and times in each one, so "Mittagessen mit Ana morgen um 15 Uhr" or "réunion jeudi à 9h" becomes the right event. Wording follows Apple's own in every language, and week start, date order and 12- or 24-hour time follow your region. ONE PURCHASE. FOUR NATIVE APPS. • iPhone: six calendar views designed for touch • iPad: an adaptive multi-pane calendar, agenda and inspector • Apple Watch: Now, Next and Later at a glance, with complications • Mac: a customizable menu bar panel plus a full calendar window • No subscription or separate mobile unlock PLAN FASTER • Create events and reminders with natural-language Quick Add, in any of the 12 languages • Move, rename or cancel events with Quick Edit • Search from the same field • Add plans with Siri, Shortcuts and the Quick Add Control STAY AHEAD • Calendar events and Apple Reminders in one agenda • Multi-day events as continuous banners across the month • One-tap Join buttons for online meetings • An invitation inbox: pending invites ring a bell until you answer, and you reply right there • Weather and moon phases in your day headers • Alert and repeat badges on events at a glance • Countdowns to the dates that matter • Travel time, leave-by guidance and notifications WIDGETS AND LIVE ACTIVITIES • Ten widgets — agenda, month, next event, now and next, week map, days ahead, countdowns, reminders and more — for the Home Screen, the Lock Screen and the Mac desktop • A Live Activity keeps your next event on the Lock Screen and in the Dynamic Island, counting down to its start • A Quick Add control for Control Center and the Action button • Eleven Apple Watch complications: now and next, leave by, countdowns, conflicts, today's load and more MAKE IT YOURS • Arrange every button on your bars — or fold the view switcher into one compact button, with a press-and-hold shortcut straight to the view you choose • Calendar sets, customizable colors and a second time zone • Your settings follow your devices through your own iCloud ON MAC Click the menu bar or press a global shortcut to see what's next without losing focus. Open the full calendar window for Day, Week, Month, Quarter, Year and List views, then drag events to reschedule or resize them. WORKS WITH THE CALENDARS YOU ALREADY USE Use calendars available through Apple Calendar, or connect Google and Microsoft accounts directly for richer event and invitation support. ZERO DATA RETENTION InstaCal has no servers, no account and no sign-up—nothing about you is collected, stored or analyzed by us. Ever. There are no analytics and no tracking of any kind. Your calendar stays on your device and syncs through the accounts you already own; settings sync travels through your personal iCloud; natural-language parsing happens on your device in all 12 languages; account tokens never leave Apple's Keychain. Some features require supported devices or services.
Task Zero
This app simplifies task management with intuitive swipe gestures for completion and scheduling. It helps users build habits, manage projects with subtasks, and organize their lives across multiple Apple devices. The core functionality is free, with premium features available via subscription.
- Swipe to complete or schedule tasks
- Habit building with recurring tasks
- Project management with subtasks
- Voice input with Siri
- Widgets for quick access
- Cloud sync across Apple devices
- Customizable tags for organization
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Get things done with a swipe. Task Zero is the beautifully simple task manager that actually helps you finish your tasks instead of just organizing them. WHY TASK ZERO WORKS Most productivity apps overwhelm you with features you'll never use. Task Zero does the opposite: swipe right to complete, swipe left to schedule. That's it. No learning curve, no decision fatigue, just momentum. Three tabs show you everything: what's scheduled, what needs doing now, and what you've accomplished. Nothing falls through the cracks. BUILD HABITS THAT STICK Create recurring tasks that match real life: Morning routines that repeat every day Weekly review meetings every Monday Workouts Monday through Friday only Anything on any schedule you need MANAGE PROJECTS WITHOUT THE CHAOS Break big tasks into action steps. "Launch website" becomes a checklist: buy domain, design homepage, write copy, test on mobile. Track progress as you go. EVERYWHERE YOU NEED IT Add tasks by voice with Siri while driving. Check your watch during meetings. Use widgets to see what's next without unlocking your phone. Cloud sync keeps everything current on iPhone, iPad, and Apple Watch. ORGANIZE YOUR WAY Create tags for work, home, errands, urgent, someday, just whatever makes sense to you. Filter instantly to see only what matters right now. WHO USES TASK ZERO People tired of complicated productivity systems. Students juggling classes and deadlines. Freelancers managing client work. Parents coordinating family schedules. Anyone who wants to spend less time organizing and more time doing. FREE TO START The core app is free forever. Premium unlocks recurring tasks, subtasks, and unlimited tags for $2.99/month or $10.95/year. WHAT MAKES IT DIFFERENT Your data stays yours—export anytime. Native iOS design that feels fast and familiar. Built by someone who actually uses it daily. Email us at taskzero@simplecore.org to get involved in the development process! THE BOTTOM LINE Download Task Zero if you want to actually complete your to-do list instead of just maintaining it. Join us in getting things done. Terms of Use: https://taskzero.simplecore.org/terms.html Apple EULA (End-User License Agreement): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: Task Zero at Free against InstaCal's $19.99. Task Zero also leads on review sentiment (100% vs 58%) and update cadence (every 2 days vs every 10 days). InstaCal's advantage is in-app purchases (none vs 2). On 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
Task Zero is free to download; InstaCal costs $19.99 up front. Task Zero sells 2 in-app purchases, starting at $2.99 per month. InstaCal asks for nothing beyond the download.
InstaCal ships an update every 10 days, Task Zero every 2 days. The most recent releases landed on September 25, 2026 and September 17, 2026 respectively.
| Parameter | InstaCal | Task Zero |
|---|---|---|
| Price | $19.99 | Free — better |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 58.1% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 10 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad, Mac, Apple Watch — better | iPhone, iPad, Apple Watch |
| Requires iOS | 18.0 | 17.6 — better |
| Further details — not scored | ||
| Size | 56 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Higher Bar, LLC | SimpleCore |
Customer experience
InstaCal
Task Zero
In-app purchases
InstaCal
No in-app purchases
Task Zero
- Premium Monthly7 Days trial$2.991 Month
- Premium Annual7 Days trial$10.951 Year





