Comparison

DekaClock vs Chrona

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

DekaClock

Features
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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.

About

Chrona

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Unleash the power of time with the Countdown app. Personalize your countdowns, set unique notifications, and seamlessly sync with your devices. Your ultimate tool for mastering every moment.

Screenshots

DekaClock4 screens
Chrona4 screens

Verdict

The call

The clearest difference is device support: Chrona at 4 against DekaClock's 2. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 13, 2026 and June 5, 2026 respectively.

Scorecard1 real difference ยท 5 level
DekaClock versus Chrona: the parameters behind the verdict, then further details
ParameterDekaClockChrona
PriceFreeFree
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, Mac, Apple Watch โ€” better
Requires iOS16.0 โ€” better17.5
Further details โ€” not scored
Size2 MB3 MB
Age rating4+4+
DeveloperCarsten TraupeYevhenii Zozulia

In-app purchases

None

DekaClock

No in-app purchases

None

Chrona

No in-app purchases

Questions

Is DekaClock free?
DekaClock is free to download, with no in-app purchases.
Is Chrona free?
Chrona is free to download, with no in-app purchases.
Do DekaClock or Chrona have ads?
Neither DekaClock nor Chrona shows ads.
Which is updated more often, DekaClock or Chrona?
DekaClock ships an update every 2 months, and Chrona every 2 months. Most recently, DekaClock was updated on September 13, 2026 and Chrona on June 5, 2026.

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