Comparison

DrPhos' Ionic Compounds vs STCW Electro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DrPhos' Ionic Compounds

This app helps students learn and practice forming correct chemical formulas for ionic compounds. It supports a wide range of ions, including polyatomic ones, and dynamically generates formulas with proper subscripts and parentheses. It's designed to reinforce naming rules and charge balancing through an interactive interface.

Highlights
  • Extensive cation and anion list
  • Support for polyatomic ions
  • Real-time formula generation
  • Subscript and parenthesis formatting
  • Reinforces naming rules
  • Charge balancing practice
Features
Read full description

Master Ionic Compounds with Ease The Ionic Compound Builder helps students learn and practice forming correct chemical formulas using a wide range of cations and anions—including polyatomic ions. Simply select a cation and an anion, and the app dynamically generates the proper formula with correct subscripts and parentheses. Designed for high school and college chemistry students, this tool reinforces naming rules and charge balancing through an intuitive, interactive interface. Features: • Extensive built-in list of common cations and anions • Support for monoatomic and polyatomic ions • Real-time chemical formula generation • Proper use of subscripts and parentheses • Visual formatting to emphasize structure and charge Whether you’re learning ionic bonding for the first time or reviewing for an exam, this tool is an essential companion for mastering chemical formulas.

About

STCW Electro

Features
Read full description

Enhance your STCW exam preparation with STCW Electro-Technical Test! Our app is meticulously designed to immerse you in a rigorous test environment, offering a diverse array of practice questions that encapsulate all critical areas necessary for Electro-Technical Officer certification. Each question is coupled with an insightful explanation, aimed at deepening your understanding and refining your technical prowess. Key Features: Extensive Question Bank: Delve into a vast repository of practice questions covering vital topics to ensure a thorough preparation experience. In-Depth Explanations: Achieve clarity and knowledge from each question with detailed rationales to bolster your learning and retention capabilities. Custom Test Creation: Tailor your quizzes by choosing specific topics and question types, empowering you to concentrate your study sessions on areas where you need the most enhancement. Progress Tracking: Monitor your advancement over time with our user-friendly progress tracking features. Offline Access: Learn anytime, anywhere, with our offline access feature, perfect for study sessions on the go without the need for an internet connection. User-Friendly Interface: Enjoy a sleek and intuitive app design that keeps you focused on mastering the technical material at hand. Download STCW Electro-Technical Test today and dive into a smarter, more effective way to prepare for your Electro-Technical Officer certification! Join countless professionals who have aced their exams with our comprehensive app. Your future as an Electro-Technical Officer starts here; embrace the challenge and conquer your career goals with the ultimate study companion at your fingertips! --- Auto-renewable subscriptions are available from the App Store for STCW Electro-Technical Test. • Payment will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration/price selected) unless auto-renew is turned off at least 24 hrs before the end of the current period. • Account will be charged for renewal within 24-hours prior to the end of the current period. • Current subscription may not be cancelled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your iTunes Account Settings after purchase. Terms of Use: https://stcwelectro.hubtests.com/terms Privacy Policy: https://stcwelectro.hubtests.com/privacy

Screenshots

DrPhos' Ionic Compounds3 screens
STCW Electro4 screens

Verdict

The call

The clearest difference is price: STCW Electro at Free against DrPhos' Ionic Compounds's $0.99. DrPhos' Ionic Compounds's advantage is update cadence (every 3 weeks vs every 3 months). On ads, in-app purchases, 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

CostPrice · In-app purchases · Ads · Monetization

STCW Electro is free to download; DrPhos' Ionic Compounds costs $0.99 up front. DrPhos' Ionic Compounds sells 11 one-off in-app purchases and STCW Electro sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

DrPhos' Ionic Compounds ships an update every 3 weeks, STCW Electro every 3 months. The most recent releases landed on September 30, 2026 and October 18, 2026 respectively.

Scorecard2 real differences · 8 level
DrPhos' Ionic Compounds versus STCW Electro: the parameters behind the verdict, then further details
ParameterDrPhos' Ionic CompoundsSTCW Electro
Price$0.99Free — better
Rating4.9 (8 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings8 — better—
Update frequencyEvery 3 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationPaid—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better17.2
Further details — not scored
Size15 MB9 MB
Age rating4+4+
DeveloperMonte L HelmCargo Teleport Inc

In-app purchases

11 purchases

DrPhos' Ionic Compounds

One-time11
  • Ionic Compound BuilderFree
  • Science Calculator$0.99
  • Significant Figures Counter$0.99
Show 8 more
  • Quadratic Equation Solver$0.99
  • Kinetics$0.99
  • Molar Mass Calculator$0.99
  • Naming Compounds$0.99
  • Reaction Balancer$0.99
  • Stoichiometry$0.99
  • Solution Concentrations$0.99
  • pH Calculator$0.99
2 purchases

STCW Electro

Subscriptions1
  • Premium monthly subscription$9.991 Month
One-time1
  • Lifetime version$24.99

Questions

Is DrPhos' Ionic Compounds free?
DrPhos' Ionic Compounds costs $0.99, and also offers in-app purchases.
Is STCW Electro free?
STCW Electro is free to download, with in-app purchases available.
Do DrPhos' Ionic Compounds or STCW Electro have ads?
Neither DrPhos' Ionic Compounds nor STCW Electro shows ads.
Which is updated more often, DrPhos' Ionic Compounds or STCW Electro?
DrPhos' Ionic Compounds ships an update every 3 weeks, and STCW Electro every 3 months. Most recently, DrPhos' Ionic Compounds was updated on September 30, 2026 and STCW Electro on October 18, 2026.

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