Comparison

Formula MAX vs DrPhos' Ionic Compounds

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

Head to head
About

Formula MAX

Access over 1100 physics, chemistry, and math formulas with a powerful search and offline access. Save favorites, use built-in calculators, and view a detailed periodic table. Designed for user convenience and quick reference.

Highlights
  • 1100+ formulas, definitions, and values
  • Offline access
  • Powerful search function
  • Favorites for quick access
  • Trigonometric and logarithmic calculators
  • Periodic table with element details
Features
Read full description

Formula MAX is a universal app with a collection of over 1100+ Physics, Chemistry and Maths formulas, more formulas to be added constantly through updates. Use your Formula MAX app across your iOS devices with exclusive device based UI, with just one purchase. The app is designed with a view of user convenience in searching, locating & referring a formula. Topics covered: Maths – Algebra, Analytical geometry, Complex numbers, Differential calculus, Differential equations, Discrete mathematics, Geometry, Integral calculus, Matrices, Mensuration, Modern Algebra, Set language, Statistics, Time series, Trigonometry, Vector algebra Physics – Atomic physics, Dynamics of Rotational motion, Electricity, Electromagnetic induction and Altering current, Electronics, Gravitation & space science, Heat, Hydrostatics, Light, Magnetism, Measurement, Mechanics, Mechanics of solids and fluids (Properties of matter), Nuclear physics, Relativity, Solar planets, Sound Chemistry – Atomic structure, Chemical bonding, Chemistry & its division, Common names & Chemical names, Important definitions, Organic chemistry, Periodic classification, Physical chemistry, States of matter Features - Huge data base of 1100+ formulas, definitions, values - Option to email the pages - Powerful search function to locate formulas - Store formulas in favorites for quick access - Trigonometric value calculator - Logarithmic value calculator - Periodic table with details about all elements - Simple and easy user interface - All the features are available offline

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.

Screenshots

Formula MAX4 screens
DrPhos' Ionic Compounds3 screens

Verdict

The call

The clearest difference is in-app purchases: Formula MAX at none against DrPhos' Ionic Compounds's 11. Formula MAX also leads on ratings volume (52 vs 8) and iOS requirement (13.0 vs 17.0). DrPhos' Ionic Compounds's advantage is update cadence (every 3 weeks vs every 11 months) and review sentiment (100% vs 80%). On price, rating, ads and monetization model 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

Formula MAX costs $0.99 and DrPhos' Ionic Compounds $0.99 up front. DrPhos' Ionic Compounds sells 11 one-off in-app purchases. Formula MAX asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Formula MAX against 4.9 for DrPhos' Ionic Compounds. That said, the two scores are not equally well evidenced: Formula MAX has 52 ratings behind it against 8, so its average is the more settled of the two. Written reviews are what separate them: 80% of Formula MAX's written reviews are positive against 100% of DrPhos' Ionic Compounds's.

UpkeepUpdate frequency

Formula MAX ships an update every 11 months, DrPhos' Ionic Compounds every 3 weeks. The most recent releases landed on October 2, 2026 and September 30, 2026 respectively.

Scorecard5 real differences · 5 level
Formula MAX versus DrPhos' Ionic Compounds: the parameters behind the verdict, then further details
ParameterFormula MAXDrPhos' Ionic Compounds
Price$0.99$0.99
Rating4.8 (52 ratings)4.9 (8 ratings) — better
Positive reviews79.8% of reviews100.0% of reviews — better
Number of ratings52 — better8
Update frequencyEvery 11 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size15 MB15 MB
Age rating4+4+
DeveloperMallow Technologies Private LimitedMonte L Helm

Customer experience

Formula MAX

All ratings52 ratings
Positive98.1%
Neutral0.0%
Negative1.9%
Written reviews104 reviews
Positive79.8%
Neutral7.7%
Negative12.5%

DrPhos' Ionic Compounds

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Formula MAX

Reported bugs

7 issues
  • Search function returns no results for some queries
  • Display glitches preventing information from showing
  • Inconsistent symbology and notation within sections
  • Spacing errors in text
  • App crashes or performance issues
Show 2 more
  • Periodic table difficult to navigate and view
  • Slow performance in some instances

Requested features

15 requests
  • Add worked examples demonstrating formula application
  • Include interactive calculators for solving problems
  • Provide step-by-step solution walkthroughs
  • Add more advanced chemistry topics (thermodynamics, quantum mechanics, etc.)
  • Include visual diagrams and illustrations
Show 10 more
  • Allow users to add custom equations and formulas
  • Add unit conversions and conversion calculators
  • Implement full-screen periodic table view
  • Include more astrophysics and advanced physics formulas
  • Add ability to copy formulas to clipboard
  • Provide French language version
  • Add more algebra and basic mathematics topics
  • Include variable input fields for formula calculations
  • Add explanatory notes and definitions
  • Improve search methodology and organization

DrPhos' Ionic Compounds

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Formula MAX

No 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

Questions

Is Formula MAX free?
Formula MAX costs $0.99, with no in-app purchases.
Is DrPhos' Ionic Compounds free?
DrPhos' Ionic Compounds costs $0.99, and also offers in-app purchases.
Which has better reviews, Formula MAX or DrPhos' Ionic Compounds?
DrPhos' Ionic Compounds is rated higher. Formula MAX averages 4.8 out of 5 from 52 ratings, while DrPhos' Ionic Compounds averages 4.9 from 8 ratings.
Do Formula MAX or DrPhos' Ionic Compounds have ads?
Neither Formula MAX nor DrPhos' Ionic Compounds shows ads.
Which is updated more often, Formula MAX or DrPhos' Ionic Compounds?
Formula MAX ships an update every 11 months, and DrPhos' Ionic Compounds every 3 weeks. Most recently, Formula MAX was updated on October 2, 2026 and DrPhos' Ionic Compounds on September 30, 2026.

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