Directional drillers ouija board. Estimated Inclination and Azimuth at the bit, based on expected Dogleg and current Inclination, Azimuth, Toolface (+-180).
Second window - TFA (in2) and pressure drop at the bit.
If youre interested, might also want to check Ouija calculator plus - better options to calculate bit hydraulics for different units - US, metric, mixed.
If there is an interest in hole hydraulics (sufficient cleaning) you might want to check "Drill Hydraulics" (free).