Comparison

Calendar Pro vs DiagramFlow Studio

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

Head to head
About

Calendar Pro

This smart calendar and daily planner helps you schedule events faster and easier. It offers natural language event creation, document scanning for event details, and supports multiple calendar systems. Organize your day with customizable categories and sync with your existing Apple Calendar.

Highlights
  • Natural language event creation
  • AI document scanning for events
  • Support for six calendar systems
  • Home screen widgets
  • Color-coded event categories
  • Apple Calendar sync
  • On-device AI processing
Features
Read full description

Plan your time. Organize your day. Never miss what matters. Calendar Pro is a smart calendar and daily planner designed to make scheduling faster and easier. Create events naturally, organize your week, set reminders, and see your entire schedule in one clear view. SMART CALENDAR PLANNING Plan your day with a powerful calendar built around the way you organize your life. • Full month calendar view • Day, week and month planning • Clear event organization • Color-coded event categories • Easy event creation and editing • Quick access to your daily agenda SMART TYPE Create events naturally without filling out complicated forms. Simply type something like: “Team meeting Monday at 3 PM for 2 hours” Calendar Pro can understand the event title, date, time, duration, and location to help you schedule faster. AI DOCUMENT SCAN Turn information from real-world documents into calendar events. Scan invitations, flyers, schedules, PDFs, and other event information using your camera. Calendar Pro uses Apple's on-device Vision technology to recognize event details and help you add them to your calendar. Your information stays on your device. SIX CALENDAR SYSTEMS Choose from six calendar systems: • Gregorian • Hijri • Hebrew • Persian • Buddhist • Chinese Plan and view your schedule using the calendar system that works best for you. HOME SCREEN WIDGETS See your upcoming events and daily agenda without opening the app. Stay informed about what's next directly from your Home Screen. SMART EVENT CATEGORIES Keep your schedule organized with categories such as: • Work • Personal • Health • Social • Travel • Finance • Other Calendar Pro can automatically identify categories based on your event. APPLE CALENDAR SYNC Calendar Pro works with Apple's native Calendar framework, allowing your events to appear in your existing Apple Calendar. Your calendar. Your iCloud. Your control. PRIVACY FIRST Your privacy matters. Calendar Pro uses on-device Apple technologies for AI processing. Your scanned documents and event information don't need to be sent to a cloud server. • No account required • No cloud-based AI processing • Your data stays on your device FREE CALENDAR + PRO FEATURES Use Calendar Pro with full core calendar functionality for free. Upgrade with a one-time purchase to unlock: • Home Screen widgets • Accent color themes • Week numbers • Unlimited AI scans Plan smarter. Schedule faster. Stay organized. Create events in seconds, turn documents into calendar events with AI, stay on top of reminders, and manage your schedule from one beautiful calendar. Download Calendar Pro today and take control of your day. Privacy Policy : https://sites.google.com/view/globalcalendarapp/home Apple Terms of Use : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

DiagramFlow Studio

Features
Read full description

Move from outline to diagram without losing the structure of your idea. DiagramFlow Studio is a local-first visual workspace for mind maps, flows, system sketches, and project outlines. BUILD VISUALLY • Create projects with connected nodes • Drag nodes around the canvas • Add, edit, and connect ideas • Apply an automatic layout when you want a clean starting point START FROM TEXT • Convert a Markdown outline into diagram nodes • Keep a readable outline alongside the visual canvas • Search and organize your project library SAVE AND DELIVER • Create named version snapshots • Export the complete project as Markdown, SVG, or JSON • Share only when you choose PRIVATE BY DEFAULT Projects and snapshots are stored locally. DiagramFlow Studio does not include advertising or cross-app tracking. The free version includes the core workflow. Pro is a one-time in-app purchase that unlocks unlimited projects and snapshots, complete exports, and future Pro features. Price and availability are shown by the App Store. The Pro screen includes Restore Purchases and a direct link to Apple’s refund-request process, including guidance for requests submitted within seven days. Eligibility and approval are determined by Apple.

Screenshots

Calendar Pro4 screens
DiagramFlow Studio4 screens

Verdict

The call

The clearest difference is ads: DiagramFlow Studio at none against Calendar Pro's shown. DiagramFlow Studio also leads on iOS requirement (17.0 vs 26.0). On price, update cadence, in-app purchases and device support 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. Calendar Pro sells 1 one-off in-app purchase and DiagramFlow Studio sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Calendar Pro ships an update monthly, DiagramFlow Studio every 5 weeks. Both last shipped on October 31, 2026.

Scorecard2 real differences · 7 level
Calendar Pro versus DiagramFlow Studio: the parameters behind the verdict, then further details
ParameterCalendar ProDiagramFlow Studio
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyMonthly — betterEvery 5 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad — better
Requires iOS26.017.0 — better
Further details — not scored
Size17 MB5 MB
Age rating9+4+
Developerxita appsYu Shiung Jiang

In-app purchases

1 purchases

Calendar Pro

One-time1
  • Calendar Pro$5.99
1 purchases

DiagramFlow Studio

One-time1
  • 圖流 DiagramFlow Studio Pro 解鎖$2.99

Questions

Is Calendar Pro free?
Calendar Pro is free to download, with in-app purchases available.
Is DiagramFlow Studio free?
DiagramFlow Studio is free to download, with in-app purchases available.
Do Calendar Pro or DiagramFlow Studio have ads?
Calendar Pro shows ads; DiagramFlow Studio does not.
Which is updated more often, Calendar Pro or DiagramFlow Studio?
Calendar Pro ships an update monthly, and DiagramFlow Studio every 5 weeks. Most recently, Calendar Pro was updated on October 31, 2026 and DiagramFlow Studio on October 31, 2026.

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