DekaClock vs AnyCalendar
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
DekaClock
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Did you ever notice, the time of the day is based on odd numbers? So, a day is split into 24 hours, an hour is split into 60 minutes and a minute is split into 60 seconds. Strange, isn't it? Since in many cultures nowadays our numbering system is based on the base of 10, the usual time structure as stated above, leads to some strange counting artefacts. DekaClock attempts to solve this by introducing a time-system strictly based on the base 10. The different tiers required will not be named hour, minute, etc. to avoid confusion, but rather "deka-1, "deka-2", ..., at least until a better naming comes up. "Deka" is the greek name for 10, so the name is very suitable. Since the duration of a second is a very tangible and the shortest time-period in the traditional time scheme, the DekaClock needs to come up with something similar. A traditional day has 24 * 60 * 60 = 86,400 seconds. So, the DekaClock day has 100,000 deka-5 periods, since ist has to be a number by an integer power of 10. Naturally by this, the DekaClock scheme has 5 tiers to give an accurate time of the day: deka-1, deka-2, deka-3, deka-4 and deka-5. A deka-5 period therefore is slightly shorter than a second, concretely 0.864 seconds. But this is close enough to "feel" the ticking of the clock correctly, as the passing of time in DekaClock shows. To give the full time of the day, consequently 5 single digit numbers from 0 to 9 are required. They are given separated by a colon each. For example midday is 5:0:0:0:0, 6am is 2:5:0:0:0 and 6pm is 7:5:0:0:0. So, a deka-1 period of time is a tenth of a full day of 24 hours, thus encompasses 2 hours and 24 minutes. The time of day "9 deka-1" as example refers to 9:36pm on our standard clock. A good time to go to bed.
AnyCalendar
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AnyCalendar lets you view, convert, and compare dates across 16 calendar systems from around the world. Whether you're tracking Islamic holidays, following the Persian new year, checking the Hebrew date, or just curious about the Mayan Long Count, AnyCalendar has you covered. Supported calendars: - Gregorian, Julian, ISO Week Date - Islamic (Hijri), Persian (Solar Hijri) - Hebrew, Chinese, Buddhist, Indian Civil (Saka) - Ethiopian (Ge'ez), Coptic, Baha'i (Badi) - Julian Day Number, Unix Timestamp, Mayan Long Count Features: Today at a glance See today's date in every calendar system. Tap any date to copy it to your clipboard. Reorder and hide calendars to show what matters to you. Date conversion Convert any date between any two calendar systems with full timezone support. Side-by-side comparison View two calendar month grids aligned day-by-day. Navigate months and see how dates line up across systems. Home screen widgets Add small or medium widgets to your home screen showing today's date in your chosen calendars. Dark mode, haptic feedback, and native script display included. Your preferences are saved between sessions.
Screenshots
Verdict
DekaClock and AnyCalendar are too close to call on the numbers: across 6 compared parameters โ price, update cadence, ads and in-app purchases among them โ neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
DekaClock ships an update every 2 months, AnyCalendar every 3 months. The most recent releases landed on October 17, 2026 and October 2, 2026 respectively.
| Parameter | DekaClock | AnyCalendar |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months โ better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 16.0 | 15.1 โ better |
| Further details โ not scored | ||
| Size | 2 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Carsten Traupe | Kaveh Tehrani |
In-app purchases
DekaClock
No in-app purchases
AnyCalendar
No in-app purchases
Questions
Is DekaClock free?
Is AnyCalendar free?
Do DekaClock or AnyCalendar have ads?
Which is updated more often, DekaClock or AnyCalendar?
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