Based on Jun Mitani's ORIPA desktop application (http://mitani.cs.tsukuba.ac.jp/oripa), ORIPA for Android enables origami designers and enthusiasts to test their crease pattern ideas even while on the go! ORIPA for Android retains the ability to check crease patterns against local flat foldability rules and test fold valid crease patterns. Useful for when inspiration for a new origami design strikes while you're away from your computer, or during long flights to origami conventions with no Wi-Fi.
[Aug 8, 2017] ORIPA for Android is currently available for worldwide beta testing on Google Play. Find the app by searching "oripa" on Google Play or view the listing here: https://play.google.com/store/apps/details?id=com.origamitoolbox.oripa.
I published ORIPA for Android under the name Origami Toolbox. Please send any feedback to: origamitoolbox [at] gmail [dot] com
I develop ORIPA for Android for free using my personal time and release it for free to users without ads. If you appreciate the app and would like to support my development efforts, please consider donating to allow me to dedicate more time to improving ORIPA for Android.
NOTE: For online transactions, PayPal takes a $0.30 fixed fee + 2.9% of payments from within the US (4.4% from outside US, plus additional currency conversion fees). Thus, a $1 dollar donation from a person in the US will result in $0.67 for me. (Source: PayPal fees)