You are only allowed to take plotters, certain calculators, and E6-Bs into the test. Details are at p 3-5 and 3-6 Order 8080.6H There are some restrictions on the types of calculator. The aviation-specific ones sold by places like Sporty’s and ASA are OK. Fancy ones that can store programs are not.
b. Test Materials. Applicants may use scales, straightedges,
protractors, plotters, navigation computers, blank logsheets, holding
pattern entry aids, and electronic or mechanical calculators that are
directly related to the test.
c. Manufacturers’ Aids. Manufacturers’ permanently inscribed
instructions on the front and back of such aids (e.g., formulas,
conversions, regulations, signals, weather data, holding pattern
diagrams, frequencies, Weight and Balance (W&B) formulas, and air
traffic control (ATC) procedures) are permissible.