Calendar Op.2 vs ScheduleViewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calendar Op.2
Organize your daily schedule with a clean and simple calendar app. It offers a beautiful month and list view with event titles, a mini pop-up for daily events, and seamless scrolling. Easily copy and paste events and search your schedule.
- Works with built-in iOS calendar
- Month & list view with event title
- Mini pop-up for daily events
- Seamless vertical scrolling
- Copy & Paste for events
- Incremental search view
Read full descriptionHide full description
Calendar Op.2 [opus two] is a very simple and easy-to-use calendar application designed for everyone who loves simple life. With its clean user interface and carefully selected feature set, you can organize your daily schedule smoother than ever. FEATURES: ● Works with built-in iOS calendar. ● Beautiful month & list view with event title. ● Mini pop-up window for daily events. ● Seamless vertical scrolling to the previous and next month. ● Copy & Paste for events. ● Incremental search view. ● Syncing with iCloud, Google Calendar, etc. via built-in iOS calendar.
ScheduleViewer
Read full descriptionHide full description
ScheduleViewer is the companion app for Provider Schedule Calendar. Instantly view the master schedule in real-time, with automatic updates as changes occur. Includes a print feature for easy schedule sharing or posting.
Screenshots
Verdict
The clearest difference is in-app purchases: ScheduleViewer at none against Calendar Op.2's 1. ScheduleViewer also leads on ads (none vs shown) and iOS requirement (17.0 vs 26.0). Calendar Op.2's advantage is update cadence (weekly vs every 2 weeks). On price 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
Both are free to download. Calendar Op.2 sells 1 one-off in-app purchase. ScheduleViewer asks for nothing beyond the download.
Calendar Op.2 ships an update weekly, ScheduleViewer every 2 weeks. The most recent releases landed on November 5, 2026 and October 30, 2026 respectively.
| Parameter | Calendar Op.2 | ScheduleViewer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (13K ratings) — better | — |
| Positive reviews | 68.5% of reviews | — |
| Number of ratings | 13K — better | — |
| Update frequency | Weekly — better | Every 2 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Yoshihiro Sakamoto | Marlix Holdings, LLC |
Bugs and requests
Calendar Op.2
Reported bugs
3 issues- Events disappearing from past months
- Time zone issues when traveling
- Inability to edit event details
Requested features
6 requests- Add more color options
- Implement landscape mode
- Allow disabling of irrelevant holidays
- Add support for Apple Watch
- Improve event editing functionality
Show 1 moreShow fewer
- Retain past event history
ScheduleViewer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calendar Op.2
- Remove Ads$5.99
ScheduleViewer
No in-app purchases
Questions
Is Calendar Op.2 free?
Is ScheduleViewer free?
Do Calendar Op.2 or ScheduleViewer have ads?
Which is updated more often, Calendar Op.2 or ScheduleViewer?
Other comparisons
