QiMenChart vs International Fixed Calendar
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QiMenChart
This app generates historical charts for years, months, days, and hours using traditional Chinese calendrical methods. It allows users to orient the chart with a compass based on their position. The application focuses solely on chart plotting without providing any analysis or user settings.
- Plot Year, Month, Day, Hour Charts
- Chai Bu and Zhi Run Methods
- Year Range 1800-9999
- Compass Orientation
- Chart Plotting Only
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* Plot Year Chart, Month Chart, Day Chart, Hour Chart (拆补法 Chai Bu Method) and (置闰法 Zhi Run Method) * Year range from 1800 to 9999 * Turn on the compass and rotate the chart to your facing or sitting * Just plot the chart, no analysis and other functions available. * No user settings.
International Fixed Calendar
Explore an alternative calendar system with 13 equal months. This app provides access to the International Fixed Calendar, featuring widgets and Apple Watch integration for easy date checking. Discover a historical calendar reform used by Kodak.
- International Fixed Calendar display
- Widgets for quick access
- Apple Watch app
- Apple Watch Complications
- Historical calendar information
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This app will allow you to check dates on the International Fixed Calendar. It also includes widgets, an Apple Watch App, and Apple Watch Complications so you can always know which date it is! The International Fixed Calendar was a planned calendar reform which added a new month, Sol, between June and July. The International Fixed Calendar therefore had 13 equal months fixed in size with 28 days each. The calendar system brought a number of great benefits, but humanity decided it would be a better idea to have another giant war instead and the plans were shelved. Good job humanity! Despite this the Kodak company used the calendar internally between 1928 and 1989. If you're a time traveling Kodak employee who owns an Apple Watch then this is the app for you!
Screenshots
Verdict
The clearest difference is review sentiment: International Fixed Calendar at 47% against QiMenChart's 0%. International Fixed Calendar also leads on price (Free vs $6.99). QiMenChart's advantage is iOS requirement (15.6 vs 17.0). On update cadence, ads, 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
International Fixed Calendar is free to download; QiMenChart costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
QiMenChart ships an update every 6 months, International Fixed Calendar every 8 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | QiMenChart | International Fixed Calendar |
|---|---|---|
| Price | $6.99 | Free — better |
| Rating | — | 3.2 (12 ratings) — better |
| Positive reviews | 0.0% of reviews | 46.7% of reviews — better |
| Number of ratings | — | 12 — better |
| Update frequency | Every 6 months — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple TV, Apple Watch — better |
| Requires iOS | 15.6 — better | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | LAY KHIM TAN | Darren Maxwell |
Customer experience
QiMenChart
International Fixed Calendar
In-app purchases
QiMenChart
No in-app purchases
International Fixed Calendar
No in-app purchases
Questions
Is QiMenChart free?
Is International Fixed Calendar free?
Do QiMenChart or International Fixed Calendar have ads?
Which is updated more often, QiMenChart or International Fixed Calendar?
Other comparisons
