One Calendar vs Brainstorm Master
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
One Calendar
Consolidate all your digital calendars into a single, easy-to-read view. Manage appointments, events, and birthdays from various providers like Google, Outlook, iCloud, and more, all within one application.
- Integrates multiple calendar providers
- Easy-to-read overview
- Manage appointments and events
- View birthdays
- Cross-platform availability
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The most popular app to view all your calendars like Google, Live, Outlook, iCloud, Exchange, Office365, Yahoo, Nextcloud, Synology, GMX, Mailbox.org, ownCloud and more. OneCalendar integrates all your calendars into an easy-to-read overview. View and manage all your appointments, events and birthdays. OneCalendar is available on all platforms.
Brainstorm Master
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Brainstorm Master is the ultimate idea generation app powered by Apple Intelligence bringing professional grade creative thinking to your iPhone and iPad INSTANT IDEA GENERATION Generate anywhere from 10 to 200 unique creative ideas in seconds all powered by on device Apple Intelligence for complete privacy Your ideas never leave your device and generation happens instantly without internet connection CURATE YOUR BEST IDEAS Select your favorite ideas from each brainstorm session and save them into beautifully organized Final Lists Choose from vibrant color themes and give each list a custom name for easy reference and quick access BEAUTIFUL USER EXPERIENCE Every interaction is crafted with care Premium animations smooth transitions and haptic feedback create a delightful experience that makes brainstorming feel effortless and inspiring The interface is clean modern and gets out of your way so you can focus on creativity POWERFUL EXPORT OPTIONS Share your ideas as formatted PDFs perfect for presentations meetings or archival Export as plain text for easy sharing via email messaging or any other app Copy individual ideas or entire lists with a single tap COMPLETE HISTORY TRACKING Never lose an idea Every brainstorm session is automatically saved to your history Browse past sessions see how many ideas you generated and track which sessions led to your best Final Lists SMART BATCHING TECHNOLOGY Request up to 200 ideas and our intelligent batching system ensures every idea is unique and creative avoiding repetition even for large requests Each batch generates fresh diverse perspectives PRIVACY FIRST DESIGN All idea generation happens entirely on your device using Apple Intelligence Your creative thoughts remain completely private with no data sent to servers or third parties FULL FEATURE LIST Generate 10 to 200 ideas per session Select and organize favorite ideas Create custom named and color coded Final Lists Export sessions and lists as PDFs Share as formatted text Individual idea editing and deletion Comprehensive history of all sessions Link Final Lists back to source sessions Contextual menus and swipe actions Haptic feedback throughout Dark mode support iPad multitasking support Smooth animations and transitions REQUIREMENTS iPhone 15 Pro iPhone 15 Pro Max iPhone 16 series or iPad with M1 or later chip iOS 26 or later Apple Intelligence enabled in Settings PERFECT FOR Content creators and writers Marketing and advertising professionals Product managers and entrepreneurs Students and educators Event planners Anyone who needs creative ideas quickly Brainstorm Master transforms the way you generate and organize ideas Download now and unleash your creative potential with the power of Apple Intelligence
Screenshots
Verdict
The clearest difference is in-app purchases: Brainstorm Master at none against One Calendar's 1. One Calendar's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 18.0). On price and ads 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. One Calendar sells 1 one-off in-app purchase. Brainstorm Master asks for nothing beyond the download.
| Parameter | One Calendar | Brainstorm Master |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (21K ratings) — better | — |
| Positive reviews | 80.7% of reviews | — |
| Number of ratings | 21K — better | — |
| Update frequency | Fortnightly | — |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 89 MB | 10 MB |
| Age rating | 12+ | 4+ |
| Developer | Code Spark | Ian SMITH |
Bugs and requests
One Calendar
Reported bugs
5 issues- Sync errors
- Unresponsive buttons
- Incorrect time zone display
- Duplicate events
- Inability to delete future occurrences of recurring events
Requested features
6 requests- Multiple reminders for events
- Ability to edit recurring events
- Option to change event calendar after creation
- Printing support
- More customization options
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- Widgets for better visibility
Brainstorm Master
Not enough reviews yet to summarise bugs or requests.
In-app purchases
One Calendar
- OneCalendar premium$5.99
Brainstorm Master
No in-app purchases
Questions
Is One Calendar free?
Is Brainstorm Master free?
Do One Calendar or Brainstorm Master have ads?
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