Comparison

Daimyo Clock vs Numbiro Premium

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

Head to head
About

Daimyo Clock

Experience traditional Japanese timekeeping with this app, which recreates a 17th-century mechanical clock. It accurately displays time divided into six equal periods for day and night, adjusting for seasonal changes in daylight.

Highlights
  • Traditional Japanese timekeeping
  • Day/night divided into six equal periods
  • Seasonal daylight adjustments
  • Accurate solar noon calculation
  • Location-based time display
  • Twilight start/end calculation
Read full description

Daimyo clock is a recreation of a mechanical clock developed in the seventeen century based on western clocks but modified to show traditional Japanese time. Traditional Japanese time divides the day and night into six equal periods from dawn to dusk and dusk to dawn respectively. Over the course of a year as the daylight and nighttime periods lengthen and shorten, the length of these six day or night periods change. Unlike Western clocks which are regulated by a single pendulum and run at a constant speed day or night, Japanese clocks incorporated two pendulums, and switched between them at dawn and dusk. Adjustment for the changing daylight and nighttime hours was accomplished by adjusting the effective length of the pendulums, normally done every two weeks, or twenty-six times a year. This kept the time shown on the clock reasonably close to the correct time, provided that the clock had been set correctly initially. This modern implementation is much more accurate and precise than the original clocks. In this implementation, the biweekly adjustments of the mechanical clock are made continuously, thus the day or night period length are always correct. Noon on the clock will, if location services are enabled, occur when the sun is at the zenith, or solar noon. Day start and end correspond to the beginning or end of twilight, and are calculated accounting for the refraction of the Earth's atmosphere. There are three situations where the clock my not show the local time in the Japanese manner: 1. If location services are off, Daimyo Clock will show the time for Tokyo, Japan. 東京 will be displayed on the clock face in this case. 2. While the application is obtaining an updated location after launch or returning to foreground. 3. Near the North or South poles the sun may either be above the horizon or below it for the entire day (24 hour period). In this case, the Japanese definition of time no longer applies, so the clock face will be shown without a clock hand.

About

Numbiro Premium

Practice recognizing spoken Japanese numbers in everyday conversation. Choose number ranges from single digits to billions and test your skills with Japanese counters. The premium version offers an ad-free experience and advanced features.

Highlights
  • Listen to spoken Japanese numbers
  • Identify numbers in conversation
  • Select custom number ranges
  • Practice Japanese counters
  • Timed challenges
  • Preset management
Features
Read full description

Learning to say numbers is one thing. Understanding them in real conversation is another. With Numbiro, you listen to numbers spoken in one of 29 languages and identify what you hear. Practice anything from single digits to millions or even billions, and improve your speed and accuracy under pressure. Japanese learners can also practice counters, with 20 included in the free version. Challenge yourself to see how many answers you can get right in one minute. Supported languages include Arabic, Brazilian Portuguese, Cantonese, Catalan, Czech, Danish, Dutch, English, Finnish, French, German, Hindi, Icelandic, Italian, Japanese, Korean, Mandarin, Norwegian, Polish, Portuguese, Romanian, Russian, Spanish, Swedish, Turkish and Welsh. Numbiro is ad-supported. Premium removes ads and unlocks additional features, including preset management and advanced Japanese counters, available with either a one-time purchase or subscription.

Screenshots

Daimyo Clock2 screens
Numbiro Premium4 screens

Verdict

The call

The clearest difference is price: Daimyo Clock at Free against Numbiro Premium's $1.99. Daimyo Clock also leads on review sentiment (100% vs 67%). Numbiro Premium's advantage is update cadence (every 3 months vs every 37 months) and iOS requirement (13.0 vs 16.0). On rating, ratings volume, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Daimyo Clock is free to download; Numbiro Premium costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.0 for Daimyo Clock against 4.0 for Numbiro Premium. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews are what separate them: 100% of Daimyo Clock's written reviews are positive against 67% of Numbiro Premium's.

UpkeepUpdate frequency

Daimyo Clock ships an update every 37 months, Numbiro Premium every 3 months. The most recent releases landed on June 1, 2026 and August 24, 2026 respectively.

Scorecard5 real differences · 5 level
Daimyo Clock versus Numbiro Premium: the parameters behind the verdict, then further details
ParameterDaimyo ClockNumbiro Premium
PriceFree — better$1.99
Rating4.0 (1 ratings)4.0 (2 ratings)
Positive reviews100.0% of reviews — better66.7% of reviews
Number of ratings12 — better
Update frequencyEvery 37 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS16.013.0 — better
Further details — not scored
Size1 MB67 MB
Age rating4+4+
DeveloperDouglas HildumSulisoft Limited

Customer experience

Daimyo Clock

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Numbiro Premium

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral33.3%
Negative0.0%

In-app purchases

None

Daimyo Clock

No in-app purchases

None

Numbiro Premium

No in-app purchases

Questions

Is Daimyo Clock free?
Daimyo Clock is free to download, with no in-app purchases.
Is Numbiro Premium free?
Numbiro Premium costs $1.99, with no in-app purchases.
Which has better reviews, Daimyo Clock or Numbiro Premium?
Daimyo Clock and Numbiro Premium are both rated 4.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Daimyo Clock or Numbiro Premium have ads?
Neither Daimyo Clock nor Numbiro Premium shows ads.
Which is updated more often, Daimyo Clock or Numbiro Premium?
Daimyo Clock ships an update every 37 months, and Numbiro Premium every 3 months. Most recently, Daimyo Clock was updated on June 1, 2026 and Numbiro Premium on August 24, 2026.

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