Apps Like Concentrator for iPhone and iPad
Ranked alternatives
Showing 121–140 of 1,000 ranked alternatives.


Units Converter & Calculator
Alok Singh
Convert of temperature, distance, weight, and speed
Convert of temperature, distance, weight, and speed. Switch between Celsius and Fahrenheit, miles and kilometers, pounds and kilograms, and kilometers per hour and miles per hour. Perform calculations and save frequently used conversions.



Kansas DMV Permit Practice
S Mehta
Take tests and track progress
Prepare for the DMV certification exam with tests based on the official state handbook. Answer multiple-choice questions, review explanations, and track progress. Complete mock exams to simulate real testing conditions.



Missouri CDL Permit Practice
S Mehta
Take tests and track progress
Prepare for CDL certification exams with state-specific tests. Review official CDL handbook content. Take multiple-choice quizzes and receive instant feedback. Track progress and retake tests as needed.

EchoGuide by ASE
American Society of Echocardiography
Select tools, calculate, chart results
Access cardiac calculators, algorithms, and charts for left and right ventricles, atria, aorta, and aortic regurgitation. Select and save favorite tools for quick access. View detailed measurements and guidelines for cardiac care.

Oklahoma CDL Permit Practice
S Mehta
Take tests and track progress
Prepare for CDL certification exams with tests based on official CDL handbooks. Answer multiple-choice questions, review explanations, and track progress. Simulate exam conditions and retake tests for reinforcement.

Equations-X
Riyad Habash
Calculate areas and volumes of polygons
Calculate areas and volumes of various shapes including squares, rectangles, triangles, circles, and ellipses. Input dimensions to get formulas and results. View volume calculations for cubes, cylinders, cones, and spheres.

Chemical Engineering AppSuite HD
Vector 254 LLC
Convert units, calculate formulas, track reactions
Calculate reactions with built-in equations and thermodynamic data. Convert units for pressure, temperature, and concentration. Solve material and energy balance problems. Access property tables for gases and liquids.

EZPZ Unit Converter
Martin Engelsgjerd
Convert units with saved favorites
Convert units across 17 categories including currency, temperature, length, weight, speed, area, and volume with over 1000 conversions and 160+ live currency rates. Save frequently used conversions and access them via a widget.


Arkansas CDL Permit Practice
S Mehta
CDL tests and track progress
CDL licensing tests based on official state handbooks. Complete state-specific exams with detailed questions. Review results and track progress. Access study materials and scenarios. Prepare for the CDL exam.

Kentucky CDL Permit Practice
S Mehta
CDL tests and track progress
Study for the CDL license exam with tests based on official state handbooks. Answer multiple-choice questions and review explanations. Track progress and retake tests to reinforce knowledge.

Mississippi CDL Permit Test
S Mehta
Take practice tests and track progress
Practice CDL licensing tests based on state guidelines. Complete multiple-choice questions and review explanations. Track progress and retake tests as needed. Access official CDL handbook content for study.



Colorado CDL Permit Practice
S Mehta
CDL tests and track progress
CDL exams based on official state handbooks. Take tests tailored to your state's regulations. Review questions and answers. Track progress and retake tests as needed.
How we rank alternatives
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