EC225 W&B
Sorry bigglebutler - can't help. Beyond Ibal for the iPhone I'm not aware of anything android based.
Maybe a bit cheeky but I am working on a related project involving W&B for aircraft and I am interested at looking at any excel spreadsheet implementations, particularly those with functions and VBA/macros behind them. If yours can't function reasonably on your tablet, it must be quite interesting - would there be any chance of getting a copy which can be treated as confidential, not for commercial use. If so, please pm. If not, I completely understand.
Thanks in advance.