Supported App Bundle.
Supported Google Play Billing Library ver3.0.
Added Banner Ads.
Changed to display Interstitial Ad when saving files
Updated targetSdkVersion to 29.
Stop displaying banner ads.
Change targetSdkVersion to 28.
Supported the new icon specification.
Update AdMob SDK to latest version.
supported General Data Protection Regulation(GDPR).
Improved application stability.
Improved application stability.
Improved application stability.
Improved application stability.
Improved application stability.
Updated advertisement SDK.
-Fixed a bug.-The advertisement SDK has been updated.
googolChooChoo 3D is a 3D model railroad simulation program.
-You can see the layout in 3D from driver's seat of a running train or from several other locations.
-Includes 7 sample layouts.