We're delighted to offer our customers the opportunity to transfer (most of) their previous Palm OS / Windows Mobile purchases to the iOS version of Pleco free-of-charge, allowing them to be used on Apple iPhones, iPods, and iPads.
Please note that due to circumstances beyond our control, copies of Pleco transferred to iOS from Palm/WM can only be used on one device at a time. So if you want to use your old Pleco purchase on both an iPhone and an iPad, for example, you'd need to purchase a second copy of Pleco for that, though that new copy (purchased originally on iOS) would then also be usable on any other compatible iPhone / iPod / iPad that syncs with the same iTunes account.
Also please note that the Stroke Order Diagrams add-ons cannot be transferred over from Palm/WM; we licensed the data for stroke order diagrams from a different source on iOS (requiring us to pay new per-copy royalties).
We do not support transfers from the Android to the iOS version of Pleco at the present time, nor do we anticipate doing so in the near future. If you'd like to use Pleco on both iOS and Android, we recommend purchasing it on iOS, since copies purchased on iOS can be transferred to Android and you can continue using them on iOS even after you make that transfer.
However, if you purchase the Android version of Pleco from our online store and then decide within 1 year of that purchase that you'd like to use the iOS version instead, purchase the iOS equivalent of what you purchased on Android, then send us proof of purchase and we'll be happy to refund you the lesser of a) the amount you paid for the Android version or b) the amount you have to pay for the iOS version. We strongly suggest that you contact us to verify that your Android purchase is eligible for this offer before buying the iOS version.