picocalc vs Calendar 365
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
picocalc
This app displays a single number on your home screen badge, which can be set, added to, or subtracted from. It's a minimalist tool for quick numerical reminders. Negative numbers and zero are not displayed on the badge.
- Set a number
- Add to number
- Subtract from number
- Home screen badge display
- Hides zero and negative numbers
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picocalc is a tiny number memo which can be set, added and subtracted. The number is show as an application badge in the home screen. Zero and a negative number won't be shown in the badge.
Calendar 365
This app offers a comprehensive calendar experience with lunar views, contact birthday reminders, and yearly overviews. Users can personalize the background and view the clock directly within the app. It also provides iPad support.
- Lunar View
- Contact birthday and anniversary support
- Yearly View
- Customizable background image
- Clock display
- iPad Support
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*** Upgrade Available Cause not pay the fees to Apple, Upgrade disabled for last few days. Now it's available. Calendar * Lunar View * Contact birthday anniversary support * Yearly View * Customize the background image * See clock * iPad Support
Screenshots
Verdict
The clearest difference is rating: picocalc at 5.0 against Calendar 365's 2.9. picocalc also leads on review sentiment (66% vs 28%) and monetization model (free vs free with in-app purchases). Calendar 365's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 16 months). On price, in-app purchases 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. picocalc sells 1 one-off in-app purchase and Calendar 365 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
picocalc holds the better App Store score, 5.0 against 2.9. That said, the two scores are not equally well evidenced: Calendar 365 has 51 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 66% of picocalc's written reviews are positive against 28% of Calendar 365's.
picocalc ships an update every 16 months, Calendar 365 every 2 weeks. The most recent releases landed on October 25, 2026 and October 23, 2026 respectively.
| Parameter | picocalc | Calendar 365 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | 2.9 (51 ratings) |
| Positive reviews | 65.6% of reviews — better | 27.6% of reviews |
| Number of ratings | 3 | 51 — better |
| Update frequency | Every 16 months | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, Apple Watch, Vision Pro — better | iPhone, iPad, iPod |
| Requires iOS | 17.6 | 4.3 — better |
| Further details — not scored | ||
| Size | 6 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Masayuki Akamatsu | NO WOO KYOUNG |
Customer experience
picocalc
Calendar 365
Bugs and requests
picocalc
Not enough reviews yet to summarise bugs or requests.
Calendar 365
Reported bugs
23 issues- App crashes immediately after opening
- App freezes when choosing events in settings
- Lost all data after update
- App does not open after update
- Holidays are on the wrong dates
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- Lunar calendar dates not displayed correctly
- Cannot add events
- Cannot add events due to privacy settings
- Cannot add Korean holidays
- Cannot add holidays from other countries
- Ad bar obstructs view of calendar
- App is slow and lags
- App crashes when opening
- Update caused instant crash
- Data from previous version not visible after update
- Cannot add events in privacy settings
- Event input is not convenient
- Cannot change label for custom fields
- Cannot see last two weeks of months due to ads
- Cannot see event details due to ads
- Next day transition removed
- Cannot input events for the next month
- App closes when clicking on something
Requested features
20 requests- Add ability to flip month to month
- View all events by month
- Keep holiday dates correctly
- View in landscape mode
- Better clock
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- Make 'upgrade' button work
- Add functions for adding events
- Ability to choose calendar for events
- Link up to Google Calendar
- Allow changing fonts/colors in YEAR View
- Add 'one week before' notification option
- Display monthly event list at a glance
- Faster data loading
- Add 'repeat annually lunar' option for birthdays
- Ability to change page
- Add memo section for notes
- Fix Korean holiday display
- Add ability to set recurring events by day of week
- Improve input usability
- Add more notification options
In-app purchases
picocalc
- Remove Ads$0.99
Calendar 365
- Calendar 365 Upgrade$1.99
