Improved the accuracy of the physics simulation, especially when enabling rotation.

This version (2.1.3) includes a fix for In-App Purchase issues with the previous version, as well as some minor UI improvements. The previous version (2.1.2) introduced: Experimental new feature for paid users: Orbit Assist By turning on Orbit Assist, added planets will be sent in a trajectory computed to produce a good orbit rather than just the direction you swipe. There are 3 different orbit assist strategies, and the best choice will depend on the situation. Experiment and see what works!

Experimental new feature for paid users: Orbit Assist By turning on Orbit Assist, added planets will be sent in a trajectory computed to produce a good orbit rather than just the direction you swipe. There are 3 different orbit assist strategies, and the best choice will depend on the situation. Experiment and see what works! Also there have been improvements to Planet Trails and refinement of UI elements.

-Fixed a bug that causes the app to crash when placing planets on devices running iOS versions earlier than iOS 9.0 Undo button, improved Apple Watch support, and more are coming with the iOS 10 update in the fall.

Another Huge Update! New Free Features: - acceleration and velocity vectors are now free - use 3DTouch to place planets of varying sizes with the same velocity on compatible devices - Apple Watch demo - bugfixes New Paid Features: - auto-center simulation (no more chasing down fleeing planets!) - full Apple Watch app (create solar systems and other simulations on the go!) In Progress: - auto-orbit (create solar systems more easily) - a feature to undo the last planet or delete planets

The massive 2.0 update is here! New Free Features! -the crazy rotation switch has reappeared -slow down and speed up time with the speed control slider -a short tutorial to introduce the most basic features -turn on "developer statistics" to see the framerate and number of nodes (planets and star particles) Gravity! Extended Edition In-App Purchase -glowy trails behind your planets -acceleration and velocity vectors -special black hole creation tool -textured planets based on the solar system -triangular, square, pentagonal, and hexagonal planets -remove ads Glitch fixes and improvements! -black holes are (somewhat) less glitchy -improved iPad support -new "Extras" section -starry background switch has been moved to "Extras" -"Edit" button has been renamed "Properties"

-Fixed compatibility with iOS 7.0 (iOS 7.1 is no longer required)

-Fixed an occasional crash when hitting the clear button on some devices

## MAJOR UPDATE ## -Use two fingers to zoom in and out and look around -Starry background -Logarithmic mass and volume sliders allow for a more exciting effect -Improved physics for black holes -Assorted fixes and enhancements

-Fixed a critical issue that affects the simulation.