Grid Calendar+ vs Core 3D Viewer
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Grid Calendar+
This app offers a visual way to manage multiple overlapping schedules, perfect for balancing work, school, and personal life. Easily add events with icons and emojis, and sync your data across devices. Integrate with existing calendars for seamless organization.
- Multiple schedule visualization
- Event management with icons/emojis
- Automatic iCloud sync
- iOS Calendar integration
- Google Calendar integration
- Group schedule sharing
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Grid Calendar is a visual scheduling app that lets you see multiple overlapping schedules at a glance. For balancing your personal life with work or school For managing projects and shifts For keeping daily notes and reminders From your own and your family's schedules to work projects and client appointments, your favorite team's games, TV shows you want to watch, and important release datesβ manage everything in one app. Use emojis and icons to quickly and easily add events and identify them at a glance. Export your calendar as a PDF for printing or sharing. With iCloud, your data automatically syncs across iPhone, iPad, and Mac. You can also sync with Apple Calendar and Google Calendar, allowing you to use Grid Calendar alongside your existing calendar apps or share schedules with others. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Core 3D Viewer
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Core 3D Viewer is a fast, clean 3D model viewer built for people who make and present 3D work: designers, engineers, furniture makers, 3D artists Open your model, set up dimensions and saved views, and show it to your client β on the phone, in AR, or through a web link that works in any browser SUPPORTED FORMATS β’ GLB, glTF, FBX, OBJ, USDZ, STL, PLY β’ STEP β full CAD import right on the device, no cloud conversion VIEW β’ Smooth orbit camera tuned for touch β’ Blueprint mode: clean engineering look with real contour lines β’ Original mode: your materials with studio HDRI lighting β’ Layers: show or hide any part of the model β’ Tap animations play if your file has them MEASURE & PRESENT (PRO) β’ Dimensions that snap to geometry and align to main planes β’ Isolate any part and save it as a view β walk your client through the model view by view β’ Adjustable label sizes, tick marks and colors, mm or inches SHARE β’ Share a photo of the current view β’ Send the model as a USDZ file or export to OBJ, STL, PLY β’ AR Quick Look: place the model in the real world β’ Share Link: upload once and send a URL β the recipient sees your model with dimensions and views in the browser, no app or account needed. Update the link when the model changes; delete it anytime. PRIVACY FIRST No accounts. No tracking. Your files stay on your device β a model is uploaded only when you create a share link, and you can revoke it at any time. Core 3D Viewer is free for viewing, AR and one active share link. Dimensions and saved views come with a subscription (7-day free trial on the yearly plan) or a one-time lifetime purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://core3dviewer.com/privacy
Screenshots
Verdict
The clearest difference is device support: Grid Calendar+ at 3 against Core 3D Viewer's 1. Grid Calendar+ also leads on iOS requirement (15.6 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Grid Calendar+ sells 1 in-app purchase, starting at $1.99 per month and Core 3D Viewer sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
Grid Calendar+ ships an update every 8 days, Core 3D Viewer every 6 days. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.
| Parameter | Grid Calendar+ | Core 3D Viewer |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 37.9% of reviews | β |
| Update frequency | Every 8 days | Every 6 days β better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | β |
| Devices | iPhone, iPad, iPod β better | iPhone |
| Requires iOS | 15.6 β better | 17.0 |
| Further details β not scored | ||
| Size | 1 MB | 41 MB |
| Age rating | 4+ | 4+ |
| Developer | y-design | Oleksandr Neskoromiuk |
In-app purchases
Grid Calendar+
- 1 Month Unlimited1 Month trial$1.991 Month
Core 3D Viewer
- Pro Monthly$5.991 Month
- Pro Yearly7 Days trial$39.991 Year
- Pro Lifetime$99.99
Questions
Is Grid Calendar+ free?
Is Core 3D Viewer free?
Do Grid Calendar+ or Core 3D Viewer have ads?
Which is updated more often, Grid Calendar+ or Core 3D Viewer?
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