The best replacement for inclinometer is clinometer.

The best alternatives to inclinometer are rated as following:
★★★★★  clinometer
★★★★  goniometer
★★  gyroscope

Your alternative for inclinometer is not listed? Suggest!
Speaking about inclinometer, one probably shouldn't forget about compass.

Other search terms related to inclinometer and their ratings are:
★★★★★ compass
built in compass
spirit level
You have in mind a companion for inclinometer and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of inclinometer in all years. Click on graph for more.
inclinometer
clinometer
goniometer