Serious sympathy about your back.<br/><br/>I don't know if this will help, but when I can't bring myself to sit at a desk, I bought a USB to Lightning adapter that's usually used for a camera, and I plug my ergonomic keyboard into it for either the phone or tablet.<br/><br/>https://www.apple.com/shop/product/MD821AM/A/lightning-to-usb-camera-adapter?afid=p238%7Cs1V0vTq76-dc_mtid_1870765e38482_pcrid_246386725857_pgrid_14874603490_&cid=aos-us-kwgo-pla-btb--slid---product-MD821AM/A