Appworthy

Calendar Op.2: Planner & Diary

Aesthetic & Minimalist Design

Yoshihiro Sakamoto
Download on theApp Store
App Store rating4.7★13.5K ratings
PriceFreeIn-app $5.99
Age4+Store age rating
Size8 MBiPhone download
CategoryProductivity
DeveloperYoshihiro Sakamoto

What we found

Full report

Too little checked to say Store information only. We haven’t analysed this app or read its reviews yet.

Money

Not yet tested.

The store currently lists version 3.0.1, updated 2026-10-26.

Preview

Screenshot 1Screenshot 2Screenshot 3Screenshot 4Screenshot 5Screenshot 6Screenshot 7Screenshot 8

Store screenshots supplied by the developer.

About this app

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.

From the developer’s store description.

For developers and the curious

The full report

The evidence, sources, measurements and versions behind every label above.

Findings and evidence

Not yet tested
Not yet tested. No analysis has been published for this app. A missing label is not a clean bill of health.

What reviewers report

No review coverage

No review analysis published for this app.

Measurements

4 measured · 4 not assessed

“Not assessed” means we could not measure it. It is never a zero and never a pass.

From store data and reviews

Developer replies to reviews
Replies to fewer than 1 review in 20
Price in the store description
The store description doesn’t list prices (most don’t)
Cancelling, in the store description
The store description doesn’t say how to cancel (most don’t)
Themes reported by reviewers
Not assessed
This app's reviews have not been assessed yet
Five-star share of ratings
65–79% five-star
Arithmetic on the stores' own published rating counts. It says nothing about why the ratings fall where they do.

In the app package we scanned

No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence, not a finding.

Sensitive permissions
Not assessed
No package has been scanned for this app
Analytics or tracking SDKs in the scanned package
Not assessed
No package has been scanned for this app
Advertising SDKs in the scanned package
Not assessed
No package has been scanned for this app
How we know

Supporting measurements: not a complete list of possible harms or positives. Measurement vocabulary 1.4 · how these are measured

Versions and dates analysed

Not yet tested

Not yet tested. No analysis has been run for this app, so there is no version or date to report.

Store update history

Each store’s release notes, as the developer wrote them. They are the developer’s words, not ours.

App Store

Version 3.0.1 · 2026-10-26
V3.0.1 fixes - Minor bug fixes for iOS 27.1. What was new in V3.0 Full support for iPhone Duo - On the large inner display, use Split View with the month and the list side by side, just like on iPad. Drag the divider to adjust the panes. - On the folded outer display, the app works with its usual iPhone layout, and switches automatically as you open and close the device. - When the device is half open, the Split View divider moves to the fold by itself. - Support for the new vertical bar in iOS 27.1: depending on orientation and posture, the buttons move to a column at the side of the screen. iOS 27.1 support - The whole app has been tuned for the latest iOS 27.1. Refreshed for the…

Shortened here; the full notes are on the store listing.

Assessment record

Status
Not yet tested
App identifier
calendar-op-2
Sources used
None recorded
Reviews read
None recorded
Package examined
No package scan
Human inspection
Not completed
How we know
Measurement vocabulary
1.4

Store facts

App Store

What the stores publish. Store ratings are the stores’ numbers, not Appworthy’s, and are never averaged across stores.

App Store

Store rating
4.66 ★ · 13,480 ratings
Version
3.0.1
Updated
26 Oct 2026
Price
Free · In-app purchases
Age rating
4+
Size
8 MB
Open in App Store
Developer
Yoshihiro Sakamoto
Category
Productivity
Listing price
Free · In-app purchases

Purchases the store lists

 What this app sells

From the store listing. Billing terms are read from each purchase’s name — the stores don’t publish them — so treat them as a strong hint, not a disclosure.

Ad removal1
Remove AdsTerm not stated$5.99

Method and limits

What this report can and cannot show

What a missing label means

Not yet tested. No analysis has been published for this app, so there is no method to describe for it yet. A missing label is not a clean bill of health: it means nothing has been read, not that nothing is wrong.

Limits of this report

  • A package scan is static. It identifies code and text in one Android build. It does not measure a live ad session, test a deletion request, or count the steps needed to cancel.
  • Reviews keep their sample. A review-only charge shows distinct reviewers, the share and the sample size, and is published only once it clears that label’s published threshold. Calibration labels are machine-drafted and not yet confirmed by a person.
  • Not assessed is a state. It is never a zero and never a pass.
  • A missing label is not a clean bill of health. It means the evidence did not support one, not that the app is problem-free.
Not yet human-reviewed. A human review gives an app hands-on, recorded measurements. None has been run for this app. Hands-on inspections are not yet open.
Review thresholds Read the methodology For developers

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