Old Japanese Clock

🇺🇸 United States
Takafumi AMANO  | 
40
ASO score
Text
31/100
Reviews
50/100
Graphic
60/100
Other
0/100
rating
App Rating
3.7
rating
Votes
19
rating
App Age
11y 8m
rating
Last Update
Dec 19, 2025

Compare with Category Top Apps

Metrics
Current App
Category Top Average
Difference
Rating
3.66
4.48
-18%
Number of Ratings (Voted)
19
506.5K
-100%
App Age
11y 8m
8y 7m
+36%
Price
$4
$0
In-app Purchases Price
$0
$49
Update Frequency
19d
40d
-53%
Title Length
18
24
-25%
Subtitle Length
30
25
+20%
Description Length
1 077
2 525
-57%
Number of Screenshots
1014
1075
-6 %
Size
9MB
278MB
-97 %

Category Ranking in United States

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Top Dec 15, 2025 Dec 22, 2025
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Ranking Keywords in United States

Keywords App Rank
Illustration
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Text ASO

Title (
Characters: 18 of 30
)
Old Japanese Clock
Subtitle (
Characters: 30 of 30
)
Life with Various Hour Systems
Description (
Characters: 1077 of 4000
)
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 This app proves invaluable when reading Japanese historical documents, adjusting Japanese clocks (Wadokei), or recreating the lifestyle of ninjas and samurais, among other apps.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.}
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Visual ASO

Screenshots

Rating & Reviews

Reviews Overview
🧐 Coming Soon…
Rating
3.7
19 voters

Some Latest Reviews

Apple Quart
13 Nov, 2025
1
地図から緯度経度をノルウェー北部にしたところ、起動すらせずにクラッシュして使えません! 緯度経度の正当処理やチェックができないのなら、機能廃止してください! まったく使い物になりません! 更新する毎、改悪過ぎです!!!
Apple Quart
08 Apr, 2025
1
1972/1/1から2099/12/30までの範囲 計算自体はユリウス通日のはずなのに残念です それと日付と時刻がピッカー選択なので、結構疲れます テキストで日付や時刻を入力できても良いのではと思いますが...
Marpopapipo
03 Apr, 2024
4
The app would be perfect with a clock face that looks like the app icon, showing the zodiac signs 🙏
Razvalyaev
20 Sep, 2020
3
This app is simply fun to use. Choose whichever time system you like and roll with it. I love the fixed system in this app :) I had some bug with notifications for fixed but it seems to be working (I hope). However, the biggest issue is that the clock doesn’t refresh properly when reopening the app.
arckrc8
20 Jun, 2020
1
Chime doesn’t work properly. If it’s 0 or 12 o’clock, it dings 9 times properly. But it dings only 4 times for all the other times. I live in U.K. and set my location in U.K. properly in your map setting or local time. If it’s a bug, please fix ASAP!
エクサクタ
14 Apr, 2020
5
歴史物には時刻が欠かせない。丑三つ時 時そば 鬼平犯科帳 遡って平将門 時刻が分からないと 理解出来ない。月齢と時刻 すべて歩いていた時代 月明かりが無ければ 夜這いも出来ない。

Other

Additional Information
Rating:
3.65
Voted: 19
App Store Link:
Price: 3.99 $
Website:
Email: -
Privacy Policy:
Categories: Lifestyle, Education
Size: 8MB
App Age: 11 years 8 months
Release Date: Apr 18, 2014
Last Update: Dec 19, 2025
Version: 1.13.3
Version history
1.13.3
Dec 19, 2025
- Fixed bugs.
1.13.2
Dec 12, 2025
- Fixed bugs.
Version history