AFNI does not run natively on iOS including iPads and iPhones, but there a few options.
1. Run on a Mac and extend display to iPad. You can use the "pen" button to draw.
[
support.apple.com]
2. Use afni remotely with an X11 server (Mocha) or a VNC server (Mocha-VNC).
[
apps.apple.com]
3. NiiVue ROI drawing demo. This is a web-based Javascript application that works on all kinds of devices. We have been collaborating with Taylor Hanayik and Chris Rorden on its development.
[
niivue.github.io]
4. Brainbox. Collaborative, web-based software for drawing regions.
[
brainbox.pasteur.fr]
Other ways to draw with a stylus.
1. Use a compatible stylus on a touchscreen of a compatible laptop (Linux / Windows with WSL)
[
www.adonit.net]
2. Use a Wacom Cintiq external touchscreen display
[
www.wacom.com]
