The iChemistry listed on April 20, 2009 was a chemistry calculator by Kyle Moore. It focused on balancing chemical equations and using their proportions to calculate amounts of reactants and products. Its historical App Store ID is 306968072.
That identity matters because later software has used the same name. This article concerns the app linked to ichemistry.innexdigital.com, not a newer chemistry tutor or a chemical-management service. The original app’s current availability has not been established.
Two related calculations
The original listing describes balancing followed by stoichiometric calculations. The archived developer site independently identifies a chemical-equation balancer and mass calculator for iPhone and iPod touch. That is enough to establish its purpose without guessing at menus, supported units or features that the surviving pages do not document.
Balancing answers a bookkeeping question: do both sides contain the same number of atoms of each element? Stoichiometry uses the resulting ratios to relate quantities. A calculator can help with that arithmetic, but the chemical formulas you enter still determine which substances the calculation represents.
Check the equation before the answer
OpenStax’s explanation of balancing makes the distinction clear: coefficients can change, while changing a formula’s subscripts changes the substance. For example, water splitting is written as 2H₂O → 2H₂ + O₂. Both sides contain four hydrogen atoms and two oxygen atoms. The equation is balanced because the counts match.
As a study habit, write the formulas first, count each element, and inspect the coefficients before moving to amounts. Do a small example by hand before relying on an unfamiliar calculator. If the hand calculation and the app disagree, check the input rather than assuming the larger-looking result must be more precise.
Keep the units visible throughout the work. A number without its unit is difficult to audit later, especially when a question switches between a mass and an amount in moles. Record what was given, what was requested and which ratio links them. This creates a calculation you can explain, rather than just an answer you can copy.
Using the historical record
The surviving iChemistry pages document a focused early mobile utility, not a complete chemistry course. They also do not prove that every proposed reaction is chemically plausible, or that an old binary runs on today’s devices.
If you are tracing the original app, use the developer name and numeric App Store ID together. If you are choosing a calculator for study now, test its explanation and input behavior against a worked example from your course before depending on it.