One Calendar vs NADCA Defects
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.
NADCA Defects
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Solve Diecasting Defects On the Spot The official NADCA Defect Dictionary puts comprehensive troubleshooting knowledge in your pocket. Designed for metallurgists, engineers, and quality professionals, this essential reference helps you quickly identify defects, understand root causes, and find proven solutions. Key Features: - Comprehensive defect catalog with detailed descriptions - Visual identification guides - Root cause analysis for each defect type - Recommended corrective actions and solutions - Quick search functionality for rapid troubleshooting - Offline access - no internet required on the shop floor Perfect For: - Metallurgists troubleshooting casting issues - Quality control engineers - Process engineers optimizing die casting operations - Production managers solving floor problems - Technical professionals in aluminum, zinc, and magnesium casting About NADCA: The North American Diecasting Association is the premier trade organization serving the diecasting industry. This app provides members with instant access to industry-standard technical knowledge. Membership Required: This app is exclusively for NADCA members. Not a member? Visit www.diecasting.org to learn about membership benefits and join today.
Screenshots
Verdict
The clearest difference is in-app purchases: NADCA Defects at none against One Calendar's 1. One Calendar's advantage is update cadence (fortnightly vs every 2 months) and device support (4 vs 1). On price, ads 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
Both are free to download. One Calendar sells 1 one-off in-app purchase. NADCA Defects asks for nothing beyond the download.
One Calendar ships an update fortnightly, NADCA Defects every 2 months. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.
| Parameter | One Calendar | NADCA Defects |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (21K ratings) — better | — |
| Positive reviews | 80.7% of reviews | — |
| Number of ratings | 21K — better | — |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone |
| Requires iOS | 15.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 89 MB | 52 MB |
| Age rating | 12+ | 4+ |
| Developer | Code Spark | Solutions Fonderie |
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
NADCA Defects
Not enough reviews yet to summarise bugs or requests.
In-app purchases
One Calendar
- OneCalendar premium$5.99
NADCA Defects
No in-app purchases
Questions
Is One Calendar free?
Is NADCA Defects free?
Do One Calendar or NADCA Defects have ads?
Which is updated more often, One Calendar or NADCA Defects?
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