Greenscreen 3270 is built for real work at the 3270 screen: hardware-keyboard first, touch-friendly, encrypted, and ready for multiple host sessions.

F1–F12 send PF1–PF12, Shift+F-keys send PF13–24, Esc resets. Remap any key.
A scrolling bar of Reset, Clear, Enter, PA1–3, F1–F24 and more, plus an optional bar for keyboards without F-keys.
Legends like “F3=Exit” or “PF8=Fwd” on the host screen become buttons.
Encrypted connections, LU and device names, models 2–5 up to 27×132, and many EBCDIC code pages.
Switch with Ctrl+Tab or Ctrl+Alt+1–9. Sessions stay connected in the background on iPadOS 26.
Record or write scripts that wait for screen text, type and press keys. Passwords are asked for each time.
Crisp, pixel-aligned text in any orientation, Split View and Stage Manager. Pinch to zoom.
Rectangular selection, and paste that skips protected fields.
Try everything offline with the included practice system. No mainframe needed.


Host configurations with TLS, TN3270E and model settings.
A guided tour on first launch, replayable from Help.
Greenscreen 3270 Enterprise adds company sign-in and central management.