With the release of CACHATTO V5.5 R5 on March 31, 2016, Android 2.3 is no longer supported on CACHATTO.
In September 9, 2015, CACHATTO discontinued its support for Android 3.0 and earlier versions of Android with the release of CACHATTO SecureBrowser V3.19.0 for Android. Android 2.3 was the only version, which CACHATTO continued to support, up until March 2016.
For more information on the CACHATTO V5.5 R5’s release, please refer to the release notes.
*Release note is only in Japanese.