Old Japanese Clock
和時計・日本の時刻制度
Not in any tracked top chart right now.
Updated 27 Sep 2026 · rankings refresh through the day
DeveloperTakafumi AMANO
CategoryLifestyle
Price600 JPY
Released
Rating★ 4.0 (15)
Version1.13.3
Age rating4+
First seen by us
25 Sep 2026
Installs (est.)1k+ worldwide
Rating
4.0 ★
15 ratings
Measured
Old Japanese Clock on the App Store
App details
App ID
852909242
Publisher
Takafumi AMANO
Content rating
4+
Old Japanese Clock downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. iPhone downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Business model: Ad-led
How Old Japanese Clock makes money: subscriptions, one-off purchases and ads.
Ads · 1 ad networks
Ads
/mo
of revenue
Where it ranks now
Every top chart it appears in across 24 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
4.0 ★
15 ratings
Measured
Ratings
15
Measured
About Old Japanese Clock
This app serves as a time converter between the current hour system and old Japanese hour systems. It offers two options: a fixed hour system and a temporal hour system.
The fixed hour system includes six different types: Engishiki, Guchureki, Semmyoreki, Semi-Engishiki, Kanagoyomi, and Shichiyoreki. These systems were primarily used from the Nara era through to the Edo era (c. 710–1872).
On the other hand, the temporal hour system encompasses seven types: Temporeki, Koten, Shaku-Sun-Bu (Class 1 and 2), and Three-Divided (Class 1 to 3). These were predominantly used during the late Edo era (1844–1872).
This app proves invaluable when reading Japanese historical documents, adjusting Japanese clocks (Wadokei), or recreating the lifestyle of ninjas and samurais, among other apps. For more detailed information, please visit the developer's website.
■ Exemption from Liability
ASTI shall not be held responsible for any consequences arising from the use of this app. We disclaim all liability for any potential damages, injuries, or losses resulting from app usage.
The fixed hour system includes six different types: Engishiki, Guchureki, Semmyoreki, Semi-Engishiki, Kanagoyomi, and Shichiyoreki. These systems were primarily used from the Nara era through to the Edo era (c. 710–1872).
On the other hand, the temporal hour system encompasses seven types: Temporeki, Koten, Shaku-Sun-Bu (Class 1 and 2), and Three-Divided (Class 1 to 3). These were predominantly used during the late Edo era (1844–1872).
This app proves invaluable when reading Japanese historical documents, adjusting Japanese clocks (Wadokei), or recreating the lifestyle of ninjas and samurais, among other apps. For more detailed information, please visit the developer's website.
■ Exemption from Liability
ASTI shall not be held responsible for any consequences arising from the use of this app. We disclaim all liability for any potential damages, injuries, or losses resulting from app usage.
Latest updates
1.13.3
- Fixed bugs.