---
title: "Astro (Astrolabe Countdown) - Reviews, Revenue and Downloads in Japan | Apple App Store"
description: "The professional sailing timer trusted by regatta racers worldwide. Astrolabe Countdown delivers split-second precision timing when every second counts at the starting line.  CORE RACING FEATURES: Bui"
---

# Astro (Astrolabe Countdown) — Japan

![Astro (Astrolabe Countdown) App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/28/3b/97/283b9705-a300-598a-e01b-dee4cc3dc611/AppIcon-0-0-1x_U007ephone-0-1-sRGB-85-220.png/434x0w.png)

**Developer:** [Chikai Lai](https://apptail.io/developer/chikai-lai-lFnib)
**Category:** Sports
**Rating:** 5.0/5 (1 ratings)
**Price:** Free
**Bundle ID:** com.heart.astrolabe
**Store:** Apple App Store
**Country:** Japan
**Version:** 1.4.6 (released 2025-09-30)
**Original Release:** 2025-01-17
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/jp/app/app/id6739977285)
**AppTail Page:** [https://apptail.io/app/astro-astrolabe-countdown-qgYu/japan](https://apptail.io/app/astro-astrolabe-countdown-qgYu/japan)

## Astro (Astrolabe Countdown) Description
The professional sailing timer trusted by regatta racers worldwide. Astrolabe Countdown delivers split-second precision timing when every second counts at the starting line.

CORE RACING FEATURES:
Build with sailing and yachting professionals worldwide
Crystal-clear edge-to-edge progress display for instant visual feedback
Reliable haptic feedback you can feel even in rough conditions
Always-active timing sessions that never sleep during critical moments
Independent Apple Watch operation - no phone dependency
Race history tracker with detailed journal entries

ADVANCED RACING TOOLS:
ProControl for advanced race timing strategies
Instant 5-minute countdown on gun signal
Auto-sync countdown to nearest minute for precision starts
Real-time distance to starting line measurement
Course shift tracking within 30 degrees
Speed over ground in precise knots

PERFECT FOR:
Competitive regatta racing
Sailing training sessions
Time-critical race starts
Professional sailing competitions
Yacht club events

APPLE WATCH OPTIMIZED:
Built natively for Apple Watch with exclusive Apple Watch Ultra features. Works seamlessly across all Apple Watch models with customizable themes to match your sailing team colors.
Start winning more races with precision timing. Download Astrolabe Countdown today.

EULA: 
Privacy Policy: 

## Astro (Astrolabe Countdown) Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/e9/e9/d2/e9e9d2a0-ac8d-0a30-5ddf-170e7a12f2c5/Astrolabe_screen_shots_1.4.001.jpeg/1320x2868.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/81/6e/a6/816ea65d-ed2d-4252-8360-347429efbd6d/Astrolabe_screen_shots_1.4.002.jpeg/1320x2868.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/6c/d1/72/6cd17232-c328-0099-0887-c30c78f25af7/Astrolabe_screen_shots_1.4.007.jpeg/1320x2868.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/db/0d/03/db0d037d-435f-9de7-c0e0-986b704b44e9/Astrolabe_screen_shots_1.3.003.jpeg/1320x2868.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/79/a4/a7/79a4a7cd-31e7-e3dc-8e03-f5838ae66d37/Astrolabe_screen_shots_1.4.005.jpeg/1320x2868.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/c3/e6/f8/c3e6f8c4-d31c-00d3-29bb-b9565324aa20/IMG_8243.png/1290x2796.png)
- [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/92/0c/22/920c2202-466c-cc73-1b61-90a11eb17e3f/IMG_8244.PNG/1290x2796.png)
- [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/a4/d5/48/a4d54894-5283-7b05-0d0a-d891b54d0eb0/Astrolabe_screen_shots_1.3.002.jpeg/1320x2868.png)
- [Screenshot 9](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/0e/ca/e9/0ecae9dc-97a7-63fe-9bac-a858a5083d97/Astrolabe_screen_shots_1.4.006.jpeg/1320x2868.png)

## Astro (Astrolabe Countdown) Rating Breakdown in Japan
- 5 stars: 1 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)


## Astro (Astrolabe Countdown) In-App Purchases
| Item | Price |
|------|-------|
| Astrolabe Pro Access (Annual) | ¥1.30 |
| ULTRA Tier One-Time Purchase | ¥7.00 |
| Annual Ultra Subscription | ¥2.50 |



## Apps Similar to Astro (Astrolabe Countdown)
- [Tactiqs](https://apptail.io/app/tactiqs-wRUd/japan)
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- [Sailing timer tactical](https://apptail.io/app/sailing-timer-tactical-RwHh/japan)
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## Astro (Astrolabe Countdown) Available In
- [Japan](https://apptail.io/app/astro-astrolabe-countdown-qgYu/japan)
- [Canada](https://apptail.io/app/astro-astrolabe-countdown-qgYu/canada)
- [Austria](https://apptail.io/app/astro-astrolabe-countdown-qgYu/austria)
- [Australia](https://apptail.io/app/astro-astrolabe-countdown-qgYu/australia)
- [Bulgaria](https://apptail.io/app/astro-astrolabe-countdown-qgYu/bulgaria)
- [Brunei](https://apptail.io/app/astro-astrolabe-countdown-qgYu/brunei)
- [Brazil](https://apptail.io/app/astro-astrolabe-countdown-qgYu/brazil)
- [Switzerland](https://apptail.io/app/astro-astrolabe-countdown-qgYu/switzerland)
- [Colombia](https://apptail.io/app/astro-astrolabe-countdown-qgYu/colombia)
- [Germany](https://apptail.io/app/astro-astrolabe-countdown-qgYu/germany)
- [Denmark](https://apptail.io/app/astro-astrolabe-countdown-qgYu/denmark)
- [Algeria](https://apptail.io/app/astro-astrolabe-countdown-qgYu/algeria)
- [France](https://apptail.io/app/astro-astrolabe-countdown-qgYu/france)
- [United Kingdom](https://apptail.io/app/astro-astrolabe-countdown-qgYu/united-kingdom)
- [Greece](https://apptail.io/app/astro-astrolabe-countdown-qgYu/greece)
- [Croatia](https://apptail.io/app/astro-astrolabe-countdown-qgYu/croatia)
- [Hungary](https://apptail.io/app/astro-astrolabe-countdown-qgYu/hungary)
- [Ireland](https://apptail.io/app/astro-astrolabe-countdown-qgYu/ireland)
- [Israel](https://apptail.io/app/astro-astrolabe-countdown-qgYu/israel)
- [India](https://apptail.io/app/astro-astrolabe-countdown-qgYu/india)
- [Iceland](https://apptail.io/app/astro-astrolabe-countdown-qgYu/iceland)
- [Italy](https://apptail.io/app/astro-astrolabe-countdown-qgYu/italy)
- [South Korea](https://apptail.io/app/astro-astrolabe-countdown-qgYu/south-korea)
- [Sri Lanka](https://apptail.io/app/astro-astrolabe-countdown-qgYu/sri-lanka)
- [Lithuania](https://apptail.io/app/astro-astrolabe-countdown-qgYu/lithuania)
- [Mali](https://apptail.io/app/astro-astrolabe-countdown-qgYu/mali)
- [Norway](https://apptail.io/app/astro-astrolabe-countdown-qgYu/norway)
- [New Zealand](https://apptail.io/app/astro-astrolabe-countdown-qgYu/new-zealand)
- [Panama](https://apptail.io/app/astro-astrolabe-countdown-qgYu/panama)
- [Peru](https://apptail.io/app/astro-astrolabe-countdown-qgYu/peru)
- [Philippines](https://apptail.io/app/astro-astrolabe-countdown-qgYu/philippines)
- [Poland](https://apptail.io/app/astro-astrolabe-countdown-qgYu/poland)
- [Portugal](https://apptail.io/app/astro-astrolabe-countdown-qgYu/portugal)
- [Russia](https://apptail.io/app/astro-astrolabe-countdown-qgYu/russia)
- [Slovenia](https://apptail.io/app/astro-astrolabe-countdown-qgYu/slovenia)
- [Tunisia](https://apptail.io/app/astro-astrolabe-countdown-qgYu/tunisia)
- [United Arab Emirates](https://apptail.io/app/astro-astrolabe-countdown-qgYu/united-arab-emirates)
- [United States](https://apptail.io/app/astro-astrolabe-countdown-qgYu/united-states)
- [Armenia](https://apptail.io/app/astro-astrolabe-countdown-qgYu/armenia)

---

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