[Nexus 7 (2013) Themes and Apps] plbelanger:
Convert Everything unit converter includes usage/time tracking, history, favorites and as of now the following conversions:

Convert Everything unit converter includes:

Acceleration - Angular

Acceleration - Linear

Angles

Frequency

Electric Potential

Ring size

Brix and Baume

Oven Temperature

Fuel Consumption

Large Numbers

Alphanumeric phone number to all numeric

Wire gauge

Sheet metal gauge

Colors - Hex to RGB, RGB to hex

Metric Unit

Men's Pants

Men's Hats

Men's Underwear

Men's Socks

Men's Dress Shirts

Men's Shoes

Women's Shoes

Women's Clothing Size

Men's Suits and Coats

Men's T-shirts

Text conversions - ASCII, hexadecimal, binary, Morse code, Base64, UPPERCASE,lowercase,sWitch cASE, Title Case, First letter of sentence, URL encode, remove spaces, remove extras, rot13 cipher, reverse text, reverse words

Moment of Force

Specific Heat Capacity

Heat Capacity

Illumination

Illumination - Luminous Intensity

Digital Image Resolution

Temperature

Torque

Length/Distance

Planetary Weight

Planetary Age

Roman Numerals

Currency

Astronomical

Sound

Volume Charge Density

Typography

Temperature Interval

Latent Heat

HVAC Efficiency

Chemical - Henry''s Law

Calorific Value

Specific Volume

Resistivity

Resistance

Thermal Expansion

Magnetomotive Force

Permeability

Surface Charge Density

Surface Current Density

Conductivity

Mass/Weight

Magnetic Field Strength

Thermal Resistivity

Thermal Conductivity

Surface Tension

Area

Force

Viscosity - Dynamic

Viscosity - Kinematic

Volume

Concentration - Liquid Solution

Concentration - Molar

Data Storage

Capacitance

Charge

Conductance

Current

Data Transfer

Density

Electric Field

Energy

Entropy

Volume - Dry

Volume - Lumber

Velocity - Angular

Velocity

Radiation - Exposure

Time

Radiation - Radioactivity

Radiation - Dose Equivalent

Radiation - Absorbed Dose Rate

Radiation - Absorbed Dose

Flow

Flow - Mass

Flow - Molar

Heat Flux Density

Heat Transfer Coefficient

Inductance

Linear Charge Density

Linear Current Density

Luminance

Magnetic Flux

Magnetic Flux Density

Mass Flux Density

Moment of Inertia

Pressure

Power

Area of Room

Blood Sugar

Cooking - butter

Time - Unix timestamp

Frequency wavelength

Time - Lead time - add days/weeks/months/years to a given date

Time - Remove time - remove days/weeks/months/years to a given date

Time - Days until - number of days until a given date

Wind chill

Volume - Objects: Barrel,Cone,Cube,Cylinder - hollow,Ellipsoid,Polygon,Pyramid,Rectangular Box,Sphere,Sphere-partially filled,Torus,Trapezoid,Wedge,Cylinder, Cuboid, Cylinder - Hemispherical ends

Women's bra band size

Women's bra cup size

Children's shoes (4-7yrs)

Children's shoes (7-12yrs)

Toddler shoes

Infant shoes

Area - Shapes: Annulus,Circle,Ellipse,Parallelogram,Rectangle,Sector of a Circle,Square,Trapezoid,Equilateral Triangle,Right Triangle,Scalene Triangle

Perimeter - Shapes: Circle,Rectangle,Polygon,Square,Parallelogram,Triangle,Rhombus,Trapezium,Ellipse

Surface Area - Sphere,Ellipsoid,Cuboid,Cube,Cylinder,Cone,Right square pyramid

Time - Old enough

Time - Date difference

Time - Julian date: Convert calendar date to Julian and vice versa

Fractions - Convert between decimals and fractions

Fuel cost

Percentage - percent calculator,percent change, percent increase/decrease,percent discount,percentage

Tip calculator

Standard deviation

Number sequences: Arithmetic,Geometric,Fibonacci

Random number generator: integers,integer set,sequence,composite/prime numbers,even/odd numbers

Percent Error

Atmosphere

Depth of Field

Statistics: Sample Size,Confidence Interval,Mean, Median, Mode,Standard Deviation,Geometric Mean,Root Mean Square/Quadratic Mean,Probability - Single Event,Simple/Linear Regression,Correlation Co-efficient,Harmonic Mean,Standard Error,Coefficient of Variation,Weighted Mean,Standard / Z score,Percentile Rank,Coefficient of Determination,Permutation, Combination,Binomial Distribution

Lite version (ad supported): https://play.google.com/store/apps/details?id=com.fluffydelusions.app.converteverything

Pro version (no ads): https://play.google.com/store/apps/details?id=com.fluffydelusions.app.converteverythingpro