I have used ForScore for many years. Agreed that the interface is clunking but it works. I either scan a chart to my laptop as a PDF or use Word to create the chart and save it as a PDF and email the PDFs to myself. Open the email / PDF on my iPad and there is an option to open / save the PDF to ForSore directly. Pretty quick and simple. I know it"s a few steps but it only takes a few minute total.
ForScore works well for set lists and the search is fairly good.