I have come across a number of surveys which are using a grid/matrix-like structure to enter the data (currently in excel), and I have to code it in ODK. I have had initial interaction on this forum for putting enquiry about its availability (Table/Matrix like data filling). However, I need to know if there is any other mobile app client which is compatible with ODK and provide this type of table-structure? Would ODK collect display it properly if I use a tablet instead of phones?
Please be careful when considering options that are not known in the ecosystem. The known-compatible clients are ODK Collect and Enketo.
If you haven't already looked at Enketo's grid theme, that may be an option to consider. There's also a matrix shortcut built on top of the grid theme that can be useful for some form structures.