價格：免費
檔案大小：34.7 MB
版本需求：需要 iOS 8.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Gravity3D shows the motion of bodies moving under the influence of gravity in three dimensions. It uses a high precision algorithm for the most accurate simulation. Clusters of planets can be created. Time can run forward or backward as you choose. Each planet can bear an image which you choose.
支援平台：iPhone, iPad