Daimyo Clock vs Numbiro Premium
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- Listen to spoken Japanese numbers
- Identify numbers in conversation
- Select custom number ranges
- Practice Japanese counters
- Timed challenges
- Preset management
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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
Verdict
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
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.
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.
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.
| Parameter | Daimyo Clock | Numbiro Premium |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.0 (1 ratings) | 4.0 (2 ratings) |
| Positive reviews | 100.0% of reviews — better | 66.7% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 37 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Douglas Hildum | Sulisoft Limited |
Customer experience
Daimyo Clock
Numbiro Premium
In-app purchases
Daimyo Clock
No in-app purchases
Numbiro Premium
No in-app purchases
Questions
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