Electrochemistry vs DrPhos' Stoichiometry
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Electrochemistry
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Electrochemistry is a tool for parameterization of oxidation-reduction reactions and electrochemical cells. The app helps to balance and combine a standard half-reactions into a single redox equation and to find the overall standard potential, equilibrium constant, standard free Gibbs energy and total voltage. The app includes redox reactions database, that automatically suggests and inserts reactions upon typing. Application Features: The calculation results are valid either for electrochemical cell or a single reaction solution. Initially, oxidation and reduction half-reactions are loaded into Anode (Oxidation) and Cathode (Reduction) parts respectively. The division can be done arbitrary, and may be easily changed (reversed) any time. The application includes redox reactions database. Upon typing into the leftmost field of any of a half reactions, list of the suggested equations will appear. It is preferable to start typing from the less common element to get a more specific suggestions. The suggestions are case sensitive! Both half reactions must be pre equilibrated stoichiometrically, as actually, they appear in standard tables. Importantly, same half-reaction may be equilibrated differently as a function of environment acidity. Application helps to find whether cell is galvanic and spontaneous or electrolytic. Voltage and potentials units are Volts only, Energy units are Joules, Temperature is in Kelvin only. Concentration units are adjusted by tapping the respective fields. If the compound is gas, then units should be set to "atm" and value should be adjusted appropriately. Solids and water are usually not taken into consideration for calculation of equilibrium constant, therefore they "concentration" fields must be left empty. The process can be easily reversed by changing oxidation and reduction reactions by pressing yellow button placed between anode and cathode parts. Long press on final reaction field copies equation to a clipboard for further usage. Compounds and their charges should be separated by comma for proper representation. The app is based on Nernst equation. Temperature value (in Kelvin) can be changed to meet custom conditions.
DrPhos' Stoichiometry
This tool simplifies solving chemical reaction problems by allowing users to input balanced equations and identify known and unknown compounds. It instantly calculates moles and mass, assisting students with various stoichiometry challenges.
- Mole, mass, and volume conversions
- Balanced chemical equation support
- Compound selection
- Limiting reactant detection
- High school and college chemistry focus
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Solve Stoichiometry Problems Fast The DrPhos Stoichiometry Tool makes solving chemical reaction problems simple. Enter a balanced equation, choose known and unknown compounds, and instantly calculate moles and mass. Designed for chemistry students, this tool walks you through the stoichiometric process with clean visuals and intelligent logic. Whether you’re solving basic mole ratios or limiting reactant problems, this app keeps your work fast, accurate, and focused. Features: • Supports mole, mass, and volume conversions • Works with balanced chemical equations • Select known and unknown compounds easily • Built-in limiting reactant detection • Ideal for high school and college chemistry Use this app on its own or unlock it within the full DrPhos GenChem Helper suite to streamline your chemistry toolkit.
Screenshots
Verdict
The clearest difference is in-app purchases: Electrochemistry at none against DrPhos' Stoichiometry's 11. DrPhos' Stoichiometry's advantage is update cadence (every 3 weeks vs every 3 months) and price ($0.99 vs $3.99). On ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Electrochemistry costs $3.99 and DrPhos' Stoichiometry $0.99 up front. DrPhos' Stoichiometry sells 11 one-off in-app purchases. Electrochemistry asks for nothing beyond the download.
Electrochemistry ships an update every 3 months, DrPhos' Stoichiometry every 3 weeks. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.
| Parameter | Electrochemistry | DrPhos' Stoichiometry |
|---|---|---|
| Price | $3.99 | $0.99 — better |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 17.2 |
| Further details — not scored | ||
| Size | 1 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Roman Volinsky | Monte L Helm |
In-app purchases
Electrochemistry
No in-app purchases
DrPhos' Stoichiometry
- Significant Figures Counter$0.99
- Science Calculator$0.99
- Quadratic Equation Solver$0.99
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- Kinetics$0.99
- Molar Mass Calculator$0.99
- General Chemistry Naming$0.99
- Ionic Compound Builder$0.99
- Solution Concentrations$0.99
- Reaction Balancer$0.99
- pH Calculator$0.99
- Stoichiometry$0.99
Questions
Is Electrochemistry free?
Is DrPhos' Stoichiometry free?
Do Electrochemistry or DrPhos' Stoichiometry have ads?
Which is updated more often, Electrochemistry or DrPhos' Stoichiometry?
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