SkyDemon is quite well programmed and there is a reason they ported it to different platforms, be it Android or iOS, because they all have a certain level of reliability today. But, there are quality differences and you can gather your relevant information from SkyDemons discussion forum. One thing you will notice is the difference in complaints for different platforms, i.e. there is a tendency that while iOS user appear to keep their operating system quite updated Androids tend to not update their tablet frequently. Many Apple questions are related to new versions of the OS, while Android questions tend to be upon incompatibilities with old system software after SD updates. But, all these discussions are now quite down in numbers compared to the large number of installations.