Calendar 365 vs 1000digit Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
1000digit Calc
Perform arithmetic operations on integers up to 1,000 digits. Supports parentheses for complex calculations and automatically saves results to the clipboard for easy reuse in other applications.
- 1,000-digit integer calculations
- Parentheses support for formula order
- Automatic clipboard saving of results
- Four basic arithmetic operations
- Cross-application result reuse
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This is a calculator that can perform four arithmetic operations on integers up to about 1,000 digits. You can use parentheses in formulas, so you can calculate in the same order as in the formula. Calculation results are saved to the clipboard each time, so they can be reused in other applications.
Screenshots
Verdict
The clearest difference is rating: 1000digit Calc at 5.0 against Calendar 365's 2.9. 1000digit Calc also leads on in-app purchases (none vs 1). Calendar 365's advantage is ratings volume (51 vs 1) and iOS requirement (4.3 vs 15.0). On price, update cadence, ads 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 365 sells 1 one-off in-app purchase. 1000digit Calc asks for nothing beyond the download.
1000digit Calc 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 1, so its average is the more settled of the two.
Calendar 365 ships an update every 2 weeks, 1000digit Calc weekly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | Calendar 365 | 1000digit Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 2.9 (51 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 27.6% of reviews | — |
| Number of ratings | 51 — better | 1 |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 4.3 — better | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | NO WOO KYOUNG | Yukihiro Shioya |
Bugs and 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
Show 18 moreShow fewer
- 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
1000digit Calc
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calendar 365
- Calendar 365 Upgrade$1.99
1000digit Calc
No in-app purchases
Questions
Is Calendar 365 free?
Is 1000digit Calc free?
Which has better reviews, Calendar 365 or 1000digit Calc?
Do Calendar 365 or 1000digit Calc have ads?
Which is updated more often, Calendar 365 or 1000digit Calc?
Other comparisons
