Comparison

Openings Studio vs Calendar.online

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

Head to head
About

Openings Studio

Manage door openings throughout the building lifecycle with this app. Document existing conditions, perform compliance checks, and complete punch lists for new construction. Syncs data with a desktop platform for seamless project management.

Highlights
  • Manage door openings and hardware
  • Document existing building conditions
  • Perform compliance checks (fire, egress, smoke)
  • Complete punch lists for new construction
  • Offline mode for on-site work
  • Syncs data with desktop platform
  • Attach photos, videos, and voice memos
Features
Read full description

Contact us to find out how you can get access to Openings Studio. Once you're in, download the Openings Studio app and start transforming your projects with cutting-edge tools designed for architects, contractors, and building professionals. The Openings Studio™ App is designed to manage door openings at all stages of a building project. Available for all smartphones, the Openings Studio™ App allows building facility managers and contractors to quickly document existing openings, perform compliance checks on fire, smoke, and egress openings, and complete punch outs for new construction. All information is synced to Openings Studio™ and accessible from the desktop, the mobile app, and field applied Smart Tags. WHY USE THE OPENINGS STUDIO™ APP? Throw away the notepad and move to digital! The mobile app allows you to access your building projects and doors and hardware on-the-go. Perform annual inspections or detail existing opening conditions. Easily transfer information from Openings Studio™ desktop-to-mobile, and back again. Streamline your on-site coordination, walkthroughs, surveys, and maintenance issues. FEATURES INCLUDE: - Add new building projects with doors, frames, and hardware sets - Document existing building conditions with detailed reporting - Add or edit door, frame and hardware information - Create access control hardware sets - Perform compliance checks, including Fire, Egress, Smoke, and Storm Shelter inspections - Share information with other project stakeholders - Complete punch lists on new construction - Identify and flag issues on openings, door-by-door, floor-by-floor - Review and update PDF floor plans on-site - Take and upload photos, videos, and voice memos - Record notations while on-site and upload to project - Create, print and affix unique Smart Tags to each opening - Access product catalogs, technical data sheets, wiring diagrams, templates and more The app is available in an off-line mode, allowing users to sync information when they’re ready via cellular or Wi-Fi connection. All information is stored in the cloud, accessible anywhere for building owners, facility managers, contractors, maintenance, and service professionals. Openings Studio™, ASSA ABLOY’s software solution for openings made easy, has evolved and set the standard for door opening scheduling, visualization, management and maintenance all within an information-rich, user-friendly environment.

About

Calendar.online

This free online calendar facilitates team collaboration with shareable access links. Manage permissions, set passwords, and customize views for seamless group scheduling. Access your calendar from any device with a simple bookmark.

Highlights
  • Shareable access links
  • Role-based permissions (admin, editor, reader)
  • Password protection for links
  • Customizable access link views
  • Dashboard for managing calendars
  • Device bookmarking
Features
Read full description

Our product is a free online calendar for teams and groups with easy access via access links without login. An access link is structured according to the following scheme: https://calendar.online/68dbf6166ace2865ccd7 Each access link has a specific permission. E.g. administrator, editor or reader. Use the admin link to manage your calendar. You can save this link as a bookmark on all your devices, for example. You could forward the editor or reader link to your teammates. Additional settings can be made for each access link. For example: - Permissions for specific sub-calendars - Password protection for extra security - Default access link view (for example 'day', 'week' and so on) - Custom access links. For example: https://calendar.online/sports In the dashboard view of the app you can add existing access links or register a new calendar. In this case, the admin link will be added automatically on the dashboard. You can access the dashboard from the calendar at any time using the button in the top left corner. To open the settings of a calendar, please open the calendar via the administrator link and then click on the gear symbol at the top right corner.

Screenshots

Openings Studio4 screens
Calendar.online4 screens

Verdict

The call

The clearest difference is rating: Openings Studio at 5.0 against Calendar.online's 4.7. Calendar.online's advantage is ratings volume (39 vs 11). On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Openings Studio holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 11 and 39 respectively.

UpkeepUpdate frequency

Openings Studio ships an update every 2 months, Calendar.online every 3 months. The most recent releases landed on July 18, 2026 and September 9, 2026 respectively.

Scorecard2 real differences · 8 level
Openings Studio versus Calendar.online: the parameters behind the verdict, then further details
ParameterOpenings StudioCalendar.online
PriceFreeFree
Rating5.0 (11 ratings) — better4.7 (39 ratings)
Positive reviews—100.0% of reviews
Number of ratings1139 — better
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size216 MB65 MB
Age rating4+4+
DeveloperOpeningsStudioKalender.digital

Customer experience

Openings Studio

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Calendar.online

All ratings39 ratings
Positive92.3%
Neutral2.6%
Negative5.1%
Written reviews15 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Openings Studio

No in-app purchases

None

Calendar.online

No in-app purchases

Questions

Is Openings Studio free?
Openings Studio is free to download, with no in-app purchases.
Is Calendar.online free?
Calendar.online is free to download, with no in-app purchases.
Which has better reviews, Openings Studio or Calendar.online?
Openings Studio is rated higher. Openings Studio averages 5.0 out of 5 from 11 ratings, while Calendar.online averages 4.7 from 39 ratings.
Do Openings Studio or Calendar.online have ads?
Neither Openings Studio nor Calendar.online shows ads.
Which is updated more often, Openings Studio or Calendar.online?
Openings Studio ships an update every 2 months, and Calendar.online every 3 months. Most recently, Openings Studio was updated on July 18, 2026 and Calendar.online on September 9, 2026.

Other comparisons