The Chemistry Keyboard is a specialized Keyboard Extension for anyone who needs to enter chemical formulae. Ever need to input Hg²⁺+2 I⁻ on your phone and can't figure out how to get those nice superscript or subscript 2s. Or a proper arrow glyph?

Well, your wait is over.

Quickly generate
superscripts: ⁰ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ ⁽ ⁾ ⁺ ⁻,
subscripts: ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ₍ ₎ ₊ ₋,
and arrows.

lowercase Greek characters available in landscape mode.
and other chemistry related Unicode characters.

The app itself demonstrates the keyboard's use by allowing text entry and looking up data from Wikipedia.

Unlike many keyboard extensions, this keyboard does not require network access. It's entirely self contained.


There are many unit conversion apps and there are many calculator apps... There are even chemistry apps and engineering apps... but there is only one Chemical Engineering AppSuite!!!

Chemical Engineering AppSuite for iPad and iPhone has been developed by a team of chemical engineers for both professionals and students. This one-of-a-kind app features many equations and data used by chemical engineers, chemists and other engineers and integrates them with unprecedented functionality! And yes, we have also unit converters and graphing calculators.

The app is also great for any high school or college student in science and math courses. Professionals will also find it very useful!

Anyone with an interest in science, chemistry, math or engineering can find ways to use Chemical Engineering AppSuite HD!

Highlights of the app include:

Full steam table calculations based on IAPWS95 model.

Database with 1000+ common industrial and laboratory chemicals

Unit converters for temperature, pressure, length, area, time, and many, many more. Select your favorites for quick access!

Physical property calculations for more than 1000 compounds and elements including densities, vapor pressures, heat capacities, viscosities.

"ChemE Tools" for rapidly solving problems in fluid dynamics, process controls, mass/mole calculations and combustion reactions!

Periodic table of the elements with a high-resolution, zoomable view

Thermodynamic Equations of State: Rapidly solve for any variable in ideal gas, Peng-Robinson, van der Waals, SRK, and others.

Calculation of compressibility factors and graphing of individual compressibility charts via the Lee-Kesler model

Binary vapor-liquid equilibrium prediction with graphing via Raoult's Law (ideal) or Wilson Model (real). Over 675 pairs possible in the Wilson Model.

Spreadsheet, statistics, and graphing tools with a built in graphing calculator! (iPad only). The iPhone version includes a very useful calculator as well!

Matrix tools and linear equation solvers.

Randomized practice problems for mass balances.

What are the basic lattice types encountered in the structures of elements and compounds? Is there more than one way to efficiently pack simple spheres? Why are copper and many other metals so malleable?

ODYSSEY Basic Crystal Lattices helps introduce the most important lattice types of elementary crystallography. Generic models are provided for the simple cubic lattice, body-centered cubic lattice, face-centered cubic lattice, hexagonally close-packed lattice, diamond lattice, and graphite lattice. Conventional and primitive unit cells are shown, coordination numbers are highlighted, and tetrahedral and octahedral holes are visualized. In total more than 160 models are available, including a comprehensive set of models for all those elements that crystallize in one of the listed structure types.

Models can be inspected at any orientation and zoom level and with a choice of drawing radius for the atoms. For most models, a “clipping sphere” can be defined, highlighting the local surroundings of a selected atom and hiding the remaining structure. The distances between atoms can be measured. A glossary, comments section, and set of multiple choice questions (with randomized options) are also included.

In almost no subject is three-dimensional visualization more important than in crystallography. ODYSSEY Basic Crystal Lattices complements and clarifies textbook descriptions of some core crystallographic concepts

What does the unit cell of sodium chloride look like? How is its structure different from other salts? What relationship, if any, exists between the structures of ionic and metallic solids?

ODYSSEY Ionic Solids is a three-dimensional visualization aid that expands on standard textbook concepts of the structure of ionic crystals. Generic models and concrete examples are provided for twelve structure types: sodium chloride, cesium chloride, zinc blende, wurtzite, fluorite, rutile, nickel arsenide, cadmium chloride, cadmium iodide, calcium chloride, perovskite, and spinel. Unit cells are presented, coordination numbers are highlighted, and the occupancy of cations in the sublattice of anions is illustrated. Models of the cubic structure types for metals (simple cubic, body-centered cubic, and face-centered cubic) are available for comparison. In total, more than a hundred models are available.

All models can be inspected at any orientation and zoom level and with a choice of the drawing radius for the ionic spheres. For any given ion, a “clipping sphere” can be defined that highlights the local surroundings of that ion and hides the remaining structure. Distances between ions can be measured, and a display of ionic charge labels is available. A glossary, comments section, and set of multiple choice questions (with randomized options) are also included.

The structural patterns presented in ionic compounds are not easily appreciated without looking at concrete models. ODYSSEY Ionic Solids helps familiarize learners with the subject and gain the experience needed to explore new structures.