---
title: "천문학 3D+: Sky Map - Reviews, Revenue and Downloads in South Korea | Apple App Store"
description: "우주 탐험: 별지도 3D+ 는 초보자 또는 전문 천문학자를 위한 휴대용 천체 지도입니다. 별지도 3D+ 를 사용하면 본인의 장소와 시간에 따라 볼 수 있는 행성, 항성, 성좌, 성단, 은하계, 성운을 찾을 수 있습니다. 또한 별지도 3D+ 는 나침반을 사용하여 자동으로 지도를 조정합니다!   • 국제우주정거장을 포함한 100개의 인공위성 및 허블우주망원경의"
---

# 천문학 3D+: Sky Map — South Korea
> 밤 하늘 안내

![천문학 3D+ App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/d3/71/28/d3712827-3384-b400-5fd2-51b006eb572b/AppIcon-0-0-1x_U007emarketing-0-11-0-sRGB-GLES2_U002c0-85-220.png/434x0w.png)

**Developer:** [Sanville Software](https://apptail.io/developer/sanville-software-mgr) (United States)
**Category:** Education
**Rating:** 4.8/5 (146 ratings)
**Price:** Free
**Bundle ID:** com.EdSanville.StarMap3DPlus
**Store:** Apple App Store
**Country:** South Korea
**Version:** 4.8.1 (released 2026-01-02)
**Original Release:** 2012-04-05
**Languages:** English, Arabic, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek (modern), Hebrew (modern), Indonesian, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Chinese, Slovak, Spanish, Swedish, Thai, Turkish, Ukrainian

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/kr/app/app/id351986992)
**AppTail Page:** [https://apptail.io/app/starmap-3d-plus-sv/south-korea](https://apptail.io/app/starmap-3d-plus-sv/south-korea)

## 천문학 3D+ Description
우주 탐험: 별지도 3D+ 는 초보자 또는 전문 천문학자를 위한 휴대용 천체 지도입니다. 별지도 3D+ 를 사용하면 본인의 장소와 시간에 따라 볼 수 있는 행성, 항성, 성좌, 성단, 은하계, 성운을 찾을 수 있습니다. 또한 별지도 3D+ 는 나침반을 사용하여 자동으로 지도를 조정합니다! 

• 국제우주정거장을 포함한 100개의 인공위성 및 허블우주망원경의 실시간 위치 

• iPad 지원 

• 100,000개 이상의 별들에 대해 각각의 자세한 정보 

• 지구로부터의 거리, 직경, 외부 크기 및 방향, 구조 등과 같은, 6,441개의 심원천체에 대한 세부 정보 

• H.A. Rey가 연구한 "별을 보는 새로운 방법(The Stars: A New Way to See Them)"의 조사 결과를 기반으로 정해진 88개의 모든 현대 별자리 

• MacRobert 및 클래식 별자리 라인도 사용가능 

• 위치 기반 서비스(LBS)/글로벌 포지셔닝 시스템(GPS)을 지원하거나 수동으로 사용자의 위도와 경도를 입력할 수 있음 

• 시간과 날짜를 조정할 수 있음 

• 시간 스크롤 기능을 사용하여 시간을 즉각적으로 조정하고 반응함 

• 해당되는 경우 나침반 지원 

• 사용자에게만 보이는 물체를 보거나 전체 천구를 탐색하기 위한 천문관 모드 

• 우주를 3차원으로 시간화하는 3D모드

## 천문학 3D+ Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource124/v4/3c/20/38/3c2038d9-9cb5-9baf-0620-ad3056bc86fe/cfe08122-c2c5-4470-8bd0-2c4ae05d0277_iPhone_11_Pro_Max-01Screenshot.png/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource114/v4/32/9b/98/329b984d-2a24-9e69-aeb7-517959d061c1/e4917302-c15c-4fab-b5ee-aab35386913d_iPhone_11_Pro_Max-02Screenshot.png/1242x2688.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource124/v4/3e/8e/86/3e8e8609-0a22-b76b-f733-cbb331e6cdba/9b7a7d24-2bf7-4064-a5c3-524a8ef6b15b_iPhone_11_Pro_Max-03Screenshot.png/1242x2688.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource124/v4/f8/b9/84/f8b98451-f822-d504-191d-cb2fddbd4f16/13d622eb-4862-4a95-8276-1a66c11c4064_iPhone_11_Pro_Max-04Screenshot.png/1242x2688.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource124/v4/0e/87/55/0e8755b0-cbd9-88d7-3ac2-af005896a200/7fc96950-b592-4c1c-a20c-6e711bb4f057_iPhone_11_Pro_Max-05Screenshot.png/1242x2688.png)

## 천문학 3D+ Rating Breakdown in South Korea
- 5 stars: 128 (88%)
- 4 stars: 13 (9%)
- 3 stars: 2 (1%)
- 2 stars: 1 (1%)
- 1 stars: 2 (1%)

## 천문학 3D+ Reviews in South Korea

### ***** "갈색외성"
갈색외성은 별에 포함되나요 ?? 포함이안된다면 갈색외성을 만들어주세요 ㅠㅠ
-- ;&₩3839202, 2021-11-01

### ***** "천문학"
좋은 앱입니다
-- 늑대사촌, 2021-08-07

### ***** "굿"
별자리를 방에 앉아서 보는게 좋네요.
-- doremion, 2021-01-10

### ****- "흔들림을 약간 줄여서..."
흔들림이 너무 심함 그래도 돟음
-- 초딩도 사람이얌, 2019-10-31

### ***** "다른 앱들은 그래픽이 화려하고 좀 정신없는데"
이 앱은 자세하면서도 심플하게 구성된 느낌이라 좋습니다
-- hd(C9RCJR), 2017-11-09

### ***** "최고의 별자리 찾기 앱"
캠핑을 좋아 하는데 우리집 애 뿐만 아니라 다른 집 애들도 별자리를 자기 눈으로 확인 하는것에 매우 흥미를 가지고 좋아 합니다
-- 비오는 밤밤, 2016-11-04

### ***** "유용하고 좋아요"
별자리 공부하기 딱 좋아요~~~~~~
-- 사냥꾼~~~, 2016-03-06

### *---- "구매취소해주세요"
그냥 무료로 떠서 받았는데 
돈지불했어요 구매취소해주세요
-- Allen_SHIN, 2015-11-04

### ***-- "아주 좋아요"
굿. 별자리 공부에 좋겠어요
-- 천현싸리, 2015-10-03

### ***** "별자리 이야기 하기 좋은 앱 이네요."
캠핑시 하늘의 수많은 별을보며 아이들에게 많은 이야기를 해 줄수 있는 앱 입니다. 덕분에 천문학에 조예가 깊은 아빠가 되었다능ㅋ
-- Erakhane, 2015-10-01

### ***** "Good!"
Very interesting!,,,,
-- echoeschoi, 2015-09-30

### ***** "Very good"
아이들 별자리 교육에 도움이 많이 되네요.
좋은 프로그램 개발해 주셔서 감사드립니다.

매일매일 좋은 하루 되세요

^_______^
-- Junho-Cha, 2015-09-07

### *---- "결제가 왜 두번 되나요 ㅡㅡ"
24일날 결제하고 다운받았는데
26일날 똑같으니까요 결제가 한번도 되네요 금액이 2.99가 되었는데 이거 환불해주세요
-- 영우엄마, 2015-04-26

### ***** "최고네요 ^^"
오차만 개선되면 좋겠습니다
-- 우쭈쭈유니, 2015-04-26

### ***** "최고의 앱!!!"
아이들과 함께 별공부할수 있는 최고의  앱!!!!
-- Ryan sibek park, 2015-02-26

### ***** "평가 별이 5개라 아쉽다"
앱 중에도 명품이 있다
바로 이 앱!!
-- 세상과구별된삶, 2015-02-21

### ***** "훌륭하네요."
카탈로그의 유성우나 인공위성 위치등 내용물도 아주 좋아요. 며칠전엔 허블망원경 위치 검색해서 망원경으로 직접 봤네요. 그 감동이란. 별이 다섯개.
-- 손님fmd, 2015-02-04

### ***** "별자리 보는게 취미라서"
잘 알지는 못하지만 별 보는걸 좋아해서 그때그때 핸드폰 열어서 어느 별자리인지 찾고 소소하게 알아가는 재미가 있네요! 정말 맘에 들어요 ㅎㅎㅎ
-- 귀요미/3, 2015-01-28

### ***** "완전짱입니다 ^^"
완전 좋고 도움되고 정확해여
-- 별이onestar, 2014-09-08

### ***** "굿"
짱짱맨!
-- ukguys, 2014-03-29

[View all 천문학 3D+ reviews and detailed analytics on AppTail](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=reviews)

## 천문학 3D+ In-App Purchases
| Item | Price |
|------|-------|
| 더 많은 별 | 3,000.00 ￦ |

## 천문학 3D+ Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Paid | Lebanon | Education | #2 |
| Top Paid | Lebanon | Overall | #5 |
| Top Paid | Italy | Education | #7 |
| Top Paid | Netherlands | Education | #16 |
| Top Paid | Azerbaijan | Education | #17 |
| Top Paid | Pakistan | Education | #19 |
| Top Paid | Egypt | Education | #19 |
| Top Paid | Mexico | Education | #22 |
| Top Paid | Hungary | Education | #24 |
| Top Paid | Colombia | Education | #26 |
| Top Paid | Ecuador | Education | #26 |
| Top Paid | Argentina | Education | #26 |
| Top Paid | Belgium | Education | #28 |
| Top Paid | Peru | Education | #28 |
| Top Paid | South Africa | Education | #30 |
| Top Paid | Kazakhstan | Education | #31 |
| Top Paid | Portugal | Education | #32 |
| Top Paid | Chile | Education | #32 |
| Top Paid | Denmark | Education | #34 |
| Top Paid | South Korea | Education | #36 |
| Top Paid | Greece | Education | #36 |
| Top Paid | Austria | Education | #37 |
| Top Paid | Czechia | Education | #38 |
| Top Paid | Israel | Education | #39 |
| Top Paid | Australia | Education | #42 |
| Top Paid | Russia | Education | #44 |
| Top Paid | India | Education | #46 |
| Top Paid | Saudi Arabia | Education | #48 |
| Top Paid | Poland | Education | #50 |
| Top Paid | Romania | Education | #50 |
| Top Paid | Finland | Education | #52 |
| Top Paid | Norway | Education | #53 |
| Top Paid | New Zealand | Education | #54 |
| Top Paid | Philippines | Education | #55 |
| Top Paid | Switzerland | Education | #56 |
| Top Paid | Kuwait | Education | #56 |
| Top Paid | Brazil | Education | #56 |
| Top Paid | Spain | Education | #57 |
| Top Paid | Taiwan | Education | #60 |
| Top Paid | United Arab Emirates | Education | #61 |
| Top Paid | Vietnam | Education | #63 |
| Top Paid | Ukraine | Education | #64 |
| Top Grossing | Lebanon | Education | #65 |
| Top Paid | Thailand | Education | #67 |
| Top Paid | Dominican Republic | Education | #67 |
| Top Paid | Ireland | Education | #68 |
| Top Paid | United States | Education | #69 |
| Top Paid | Indonesia | Education | #75 |
| Top Paid | France | Education | #75 |
| Top Paid | Malaysia | Education | #78 |
| Top Paid | Hong Kong SAR China | Education | #83 |
| Top Paid | Türkiye | Education | #84 |
| Top Paid | Italy | Overall | #89 |
| Top Paid | Sweden | Education | #93 |
| Top Paid | Singapore | Education | #101 |
| Top Paid | Germany | Education | #112 |
| Top Paid | Belarus | Education | #160 |
| Top Paid | Canada | Education | #160 |
| Top Paid | Netherlands | Overall | #170 |
| Top Paid | Nigeria | Education | #183 |
| Top Paid | Azerbaijan | Overall | #192 |
| Top Paid | Pakistan | Overall | #220 |
| Top Paid | China | Education | #243 |
| Top Paid | Mexico | Overall | #253 |
| Top Paid | Kazakhstan | Overall | #253 |
| Top Paid | Egypt | Overall | #264 |
| Top Paid | United Kingdom | Education | #335 |
| Top Paid | Chile | Overall | #343 |
| Top Paid | Switzerland | Overall | #353 |
| Top Paid | South Korea | Overall | #353 |
| Top Paid | Israel | Overall | #354 |
| Top Paid | Czechia | Overall | #358 |
| Top Paid | Australia | Overall | #365 |
| Top Paid | Colombia | Overall | #365 |
| Top Paid | Denmark | Overall | #370 |
| Top Paid | Ecuador | Overall | #373 |
| Top Paid | Ukraine | Overall | #384 |
| Top Paid | South Africa | Overall | #401 |
| Top Paid | Austria | Overall | #403 |
| Top Paid | Belgium | Overall | #404 |
| Top Paid | Saudi Arabia | Overall | #407 |
| Top Paid | New Zealand | Overall | #409 |
| Top Paid | Hungary | Overall | #412 |
| Top Paid | Argentina | Overall | #421 |
| Top Paid | Norway | Overall | #429 |
| Top Paid | Russia | Overall | #429 |
| Top Paid | Brazil | Overall | #436 |
| Top Paid | Peru | Overall | #441 |
| Top Paid | Romania | Overall | #451 |
| Top Paid | Portugal | Overall | #466 |
| Top Paid | Sweden | Overall | #473 |

## 천문학 3D+ Discovered Keywords
- sky map
- 스카이맵
- 천문학 3d
- 별자리앱
- 별자리 찾기
- 별지도
- skymap
- skywalk
- 밤하늘
- night sky guide

## Apps Similar to 천문학 3D+
- [Moon Globe](https://apptail.io/app/moon-globe-Oo/south-korea)
- [Solar Walk: Space Simulator 3D](https://apptail.io/app/solar-walk-space-simulator-3d-zt/south-korea)
- [Star Walk 2 Pro: Sky Map Live](https://apptail.io/app/star-walk-2-pro-sky-map-live-ajf/south-korea)
- [Star Map Tracker: Sky Journey](https://apptail.io/app/star-map-tracker-sky-journey-RNl/south-korea)
- [SkySafari](https://apptail.io/app/skysafari-Fvm/south-korea)
- [SkySafari 7 Pro](https://apptail.io/app/skysafari-7-pro-Ydz/south-korea)
- [SkySafari 6 Pro](https://apptail.io/app/skysafari-6-pro-ctL/south-korea)
- [Solar Walk 2 - View Planets 3D](https://apptail.io/app/solar-walk-2-view-planets-3d-jtL/south-korea)
- [SkySafari 6 Plus](https://apptail.io/app/skysafari-6-plus-ktL/south-korea)
- [Celestron StarSense Explorer](https://apptail.io/app/celestron-starsense-explorer-EDO/south-korea)

## 천문학 3D+ Available In
- [United States](https://apptail.io/app/starmap-3d-plus-sv/united-states)
- [Germany](https://apptail.io/app/starmap-3d-plus-sv/germany)
- [Switzerland](https://apptail.io/app/starmap-3d-plus-sv/switzerland)
- [Japan](https://apptail.io/app/starmap-3d-plus-sv/japan)
- [United Kingdom](https://apptail.io/app/starmap-3d-plus-sv/united-kingdom)
- [France](https://apptail.io/app/starmap-3d-plus-sv/france)
- [Sweden](https://apptail.io/app/starmap-3d-plus-sv/sweden)
- [Netherlands](https://apptail.io/app/starmap-3d-plus-sv/netherlands)
- [Italy](https://apptail.io/app/starmap-3d-plus-sv/italy)
- [Australia](https://apptail.io/app/starmap-3d-plus-sv/australia)
- [China](https://apptail.io/app/starmap-3d-plus-sv/china)
- [Russia](https://apptail.io/app/starmap-3d-plus-sv/russia)
- [Canada](https://apptail.io/app/starmap-3d-plus-sv/canada)
- [Spain](https://apptail.io/app/starmap-3d-plus-sv/spain)
- [Norway](https://apptail.io/app/starmap-3d-plus-sv/norway)
- [Brazil](https://apptail.io/app/starmap-3d-plus-sv/brazil)
- [Denmark](https://apptail.io/app/starmap-3d-plus-sv/denmark)
- [Austria](https://apptail.io/app/starmap-3d-plus-sv/austria)
- [Mexico](https://apptail.io/app/starmap-3d-plus-sv/mexico)
- [South Korea](https://apptail.io/app/starmap-3d-plus-sv/south-korea)
- [Taiwan](https://apptail.io/app/starmap-3d-plus-sv/taiwan)
- [Belgium](https://apptail.io/app/starmap-3d-plus-sv/belgium)
- [Saudi Arabia](https://apptail.io/app/starmap-3d-plus-sv/saudi-arabia)
- [Poland](https://apptail.io/app/starmap-3d-plus-sv/poland)
- [Chile](https://apptail.io/app/starmap-3d-plus-sv/chile)
- [New Zealand](https://apptail.io/app/starmap-3d-plus-sv/new-zealand)
- [Czechia](https://apptail.io/app/starmap-3d-plus-sv/czechia)
- [Ukraine](https://apptail.io/app/starmap-3d-plus-sv/ukraine)
- [Colombia](https://apptail.io/app/starmap-3d-plus-sv/colombia)
- [Türkiye](https://apptail.io/app/starmap-3d-plus-sv/turkey)
- [Thailand](https://apptail.io/app/starmap-3d-plus-sv/thailand)
- [India](https://apptail.io/app/starmap-3d-plus-sv/india)
- [Israel](https://apptail.io/app/starmap-3d-plus-sv/israel)
- [South Africa](https://apptail.io/app/starmap-3d-plus-sv/south-africa)
- [Portugal](https://apptail.io/app/starmap-3d-plus-sv/portugal)
- [Argentina](https://apptail.io/app/starmap-3d-plus-sv/argentina)
- [Ireland](https://apptail.io/app/starmap-3d-plus-sv/ireland)
- [Hungary](https://apptail.io/app/starmap-3d-plus-sv/hungary)
- [Hong Kong SAR China](https://apptail.io/app/starmap-3d-plus-sv/hong-kong)
- [United Arab Emirates](https://apptail.io/app/starmap-3d-plus-sv/united-arab-emirates)
- [Kazakhstan](https://apptail.io/app/starmap-3d-plus-sv/kazakhstan)
- [Indonesia](https://apptail.io/app/starmap-3d-plus-sv/indonesia)
- [Malaysia](https://apptail.io/app/starmap-3d-plus-sv/malaysia)
- [Peru](https://apptail.io/app/starmap-3d-plus-sv/peru)
- [Greece](https://apptail.io/app/starmap-3d-plus-sv/greece)
- [Kuwait](https://apptail.io/app/starmap-3d-plus-sv/kuwait)
- [Singapore](https://apptail.io/app/starmap-3d-plus-sv/singapore)
- [Philippines](https://apptail.io/app/starmap-3d-plus-sv/philippines)
- [Slovakia](https://apptail.io/app/starmap-3d-plus-sv/slovakia)
- [Finland](https://apptail.io/app/starmap-3d-plus-sv/finland)
- [Luxembourg](https://apptail.io/app/starmap-3d-plus-sv/luxembourg)
- [Ecuador](https://apptail.io/app/starmap-3d-plus-sv/ecuador)
- [Romania](https://apptail.io/app/starmap-3d-plus-sv/romania)
- [Vietnam](https://apptail.io/app/starmap-3d-plus-sv/vietnam)
- [Egypt](https://apptail.io/app/starmap-3d-plus-sv/egypt)
- [Belarus](https://apptail.io/app/starmap-3d-plus-sv/belarus)
- [Pakistan](https://apptail.io/app/starmap-3d-plus-sv/pakistan)
- [Oman](https://apptail.io/app/starmap-3d-plus-sv/oman)
- [Malta](https://apptail.io/app/starmap-3d-plus-sv/malta)
- [Qatar](https://apptail.io/app/starmap-3d-plus-sv/qatar)
- [Bulgaria](https://apptail.io/app/starmap-3d-plus-sv/bulgaria)
- [Cyprus](https://apptail.io/app/starmap-3d-plus-sv/cyprus)
- [Croatia](https://apptail.io/app/starmap-3d-plus-sv/croatia)
- [Iceland](https://apptail.io/app/starmap-3d-plus-sv/iceland)
- [Armenia](https://apptail.io/app/starmap-3d-plus-sv/armenia)
- [Lebanon](https://apptail.io/app/starmap-3d-plus-sv/lebanon)
- [Sri Lanka](https://apptail.io/app/starmap-3d-plus-sv/sri-lanka)
- [Macao SAR China](https://apptail.io/app/starmap-3d-plus-sv/macau)
- [Estonia](https://apptail.io/app/starmap-3d-plus-sv/estonia)
- [Dominican Republic](https://apptail.io/app/starmap-3d-plus-sv/dominican-republic)
- [Paraguay](https://apptail.io/app/starmap-3d-plus-sv/paraguay)
- [Slovenia](https://apptail.io/app/starmap-3d-plus-sv/slovenia)
- [Azerbaijan](https://apptail.io/app/starmap-3d-plus-sv/azerbaijan)
- [Bermuda](https://apptail.io/app/starmap-3d-plus-sv/bermuda)
- [Lithuania](https://apptail.io/app/starmap-3d-plus-sv/lithuania)
- [Bahrain](https://apptail.io/app/starmap-3d-plus-sv/bahrain)
- [Mauritius](https://apptail.io/app/starmap-3d-plus-sv/mauritius)
- [Latvia](https://apptail.io/app/starmap-3d-plus-sv/latvia)
- [Uzbekistan](https://apptail.io/app/starmap-3d-plus-sv/uzbekistan)
- [Angola](https://apptail.io/app/starmap-3d-plus-sv/angola)
- [Cayman Islands](https://apptail.io/app/starmap-3d-plus-sv/cayman-islands)
- [Namibia](https://apptail.io/app/starmap-3d-plus-sv/namibia)
- [Senegal](https://apptail.io/app/starmap-3d-plus-sv/senegal)
- [Tunisia](https://apptail.io/app/starmap-3d-plus-sv/tunisia)
- [Honduras](https://apptail.io/app/starmap-3d-plus-sv/honduras)
- [Jordan](https://apptail.io/app/starmap-3d-plus-sv/jordan)
- [Nigeria](https://apptail.io/app/starmap-3d-plus-sv/nigeria)
- [Nepal](https://apptail.io/app/starmap-3d-plus-sv/nepal)
- [Panama](https://apptail.io/app/starmap-3d-plus-sv/panama)
- [Grenada](https://apptail.io/app/starmap-3d-plus-sv/grenada)
- [Algeria](https://apptail.io/app/starmap-3d-plus-sv/algeria)
- [Mali](https://apptail.io/app/starmap-3d-plus-sv/mali)
- [Uruguay](https://apptail.io/app/starmap-3d-plus-sv/uruguay)
- [North Macedonia](https://apptail.io/app/starmap-3d-plus-sv/north-macedonia)
- [Madagascar](https://apptail.io/app/starmap-3d-plus-sv/madagascar)
- [Belize](https://apptail.io/app/starmap-3d-plus-sv/belize)
- [Brunei](https://apptail.io/app/starmap-3d-plus-sv/brunei)
- [Ghana](https://apptail.io/app/starmap-3d-plus-sv/ghana)
- [Kenya](https://apptail.io/app/starmap-3d-plus-sv/kenya)

---

## About AppTail

[AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends.

- [Search Apps](https://apptail.io)
- [Top Charts](https://apptail.io/top-iphone-apps)
- [Sign Up for Full Access](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=footer)

*Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*