All-In-One Calculator is a lightweight, clean and easy to use calculator and converter pack.Containing over 50 calculators and unit converters packed in with a scientific calculator, it’s the only math app you will ever need from now on on your device.It’s a great calculator for school and homework, but not only. If you’re a scholar, student, teacher. builder, handyman, contractor, etc.. and you need an all in one tool for your device, give this one a try. You will never be disappointed.Features • Over 50 Calculators and Unit converters • Scientific calculator with history • Currency converter with 160 currencies, available offline • Supports math formulas as input • Instant results • Integrated search • Favorite list for quick access • Tablet supportLanguages: English (currently looking for translators)Complete list of all the calculators and unit converters Algebra • Percentage calculator • Proportion calculator • Average calculator – arithmetic, geometric and harmonic means • Equation solver – linear, quadratic and equation system. • Combinations and permutations • Decimal to fraction • Fraction simplifier • Greatest common factor & Lowest common multiple calculator • Random number generatorGeometry • Area / perimeter calculator for square, rectangle, parallelogram, trapezoid, rhombus, triangle, pentagon, hexagon, circle, circle arc, ellipse • Volume calculator for cube, rect. prism, square pyramid, sq. pyramid frustum, trapezoidal footing, cylinder, cone, conical frustum, sphere, spherical cap, spherical frustum, ellipsoid. • Right triangle calculator • Heron’s formula (solve a triangle knowing the side lengths) • Circle solverUnit converters • Acceleration converter • Angle converter • Length converter • Energy converter • Force converter • Torque converter • Area converter • Volume converter • Volumetric flow converter • Weight converter • Temperature converter • Pressure converter • Power converter • Speed converter • Mileage converter • Time converter • Digital storage converter • Data transfer speed converter • Numeric base converter • Roman numerals converter • Shoe size converterFinance • Currency converter with 161 currencies available offline • VAT calculator • Tip calculator • Loan calculator • Electricity cost calculator • Cost of smoking calculatorHealth • Body mass index – BMI • Daily calories burn • Body fat percentageEngineering • Ohm’s law calculator – voltage, current, resistance and power • Speed/Distance/Time • Cylinder force calculator • Resistance calculator • Density calculatorMiscellaneous • Elapsed time calculatorWHAT’S NEWVersion 1.1.5 Various minor issues fixed Added Ring Size Converter Added something that was not here before, but in a very nice and decent way Screenshots

// Option A //

To download All-in-one Calculator Pro mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download All-in-one Calculator Pro mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download All-in-one Calculator Pro from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search All-in-one Calculator Pro in HappyMod App.