Comparison

Chemguy vs SimpleTools

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

Head to head
About

Chemguy

Master high school, AP, IB, and first-year university chemistry with over 200 video lessons, comprehensive notes, and over 1000 practice problems. Interactive quizzes and unit exams reinforce learning, with direct messaging support for personalized help.

Highlights
  • Over 200 video lessons
  • Comprehensive classroom notes
  • 1000+ practice problems
  • 100+ interactive quizzes
  • Unit exams
  • Direct messaging support
Features
Read full description

The Chemguy App has arrived! I'm Rob Lederer and I taught chemistry for 35 years. I've taught all high school levels of chemistry, including AP Chemistry and IB Chemistry, too! Since 2003, I have been known as Chemguy to the students outside of my classroom. My Chemguy YouTube videos have millions of views. The Chemguy App that I have personally built has distilled my teaching career into a course that completely covers high school chemistry, AP and IB material, and first year university chemistry. Everything is covered: The Periodic Table, Compounds and Reactions, Stoichiometry, Solutions, Gases, Atomic Theory, Chemical Bonding, Molecular Shapes, Energy, Electrochemistry, Chemical Equilibrium, Acids and Bases, Organic Chemistry, Chemical Kinetics, Thermodynamics, and Calculating Uncertainty Values. Phew! This is what you get in the Chemguy App: 1. Over 200 video lessons, where I teach all the chemistry principles, give detailed explanations, and problem-solve through all the calculations in every unit of study. 2. My entire classroom note package. All the material explained, with tables and diagrams and pictures. At the end of each lesson there are practice problems, over 1000 in all, to hone your chemistry skills. 3. Tests! I have made close to 100 interactive quizzes for all the lessons and summary unit exams, too! That's a total of over 1000 questions to practice! 4. Chemguy Messaging. After going through all of the above, is there still something that you need help with? Send me a text in the chat function of the app! Let's talk about it! So, watch the videos, read the notes, do the practice problems, have fun with the quizzes, and cap each unit off with the exam. And if something is bugging you, chemistry-wise, send me a message and let's chat about it! If you want to know more about me, what I've done and what I continue to do, please visit my website, roblederer.ca

About

SimpleTools

Instantly solve chemistry problems with AI-powered, step-by-step explanations. Snap a photo of any chemistry question and receive a clear, structured solution in seconds, helping students and parents understand problem-solving processes.

Highlights
  • AI-powered problem solving
  • Photo scanning for problems
  • Step-by-step explanations
  • Supports various chemistry topics
  • Unlimited scans with premium
Features
Read full description

Solve chemistry problems instantly with AI-powered step-by-step explanations. Take a photo of any chemistry problem and get a clear, structured solution in seconds. Whether you’re a student preparing for exams or a parent helping with homework, SimpleTools: Chemistry Solver helps you understand how to solve problems — not just get answers. What you can solve: • Chemical equations and reactions • Stoichiometry problems • pH and acid-base calculations • Organic chemistry problems • Ionic equations • Chemical formulas and balancing • Laboratory and homework tasks How it works: 1. Take a photo of your chemistry problem 2. Our AI analyzes it 3. Receive a detailed step-by-step solution Free & Premium: Free users can solve only one problem per day. Premium subscription unlocks: • Unlimited AI-powered solutions • Unlimited scans • Full step-by-step explanations Subscriptions are available weekly and yearly. A free trial is available for new yearly subscribers. Subscription Terms: Payment will be charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Terms of Use: https://simpletools-apps.com/terms Privacy Policy: https://simpletools-apps.com/privacy

Screenshots

Chemguy4 screens
SimpleTools4 screens

Verdict

The call

The clearest difference is update cadence: SimpleTools at weekly against Chemguy's every 41 months. Chemguy's advantage is monetization model (free vs freemium) and ratings volume (4 vs 1). On price, rating, review sentiment and ads 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

Both are free to download. Chemguy sells 1 one-off in-app purchase and SimpleTools sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Chemguy against 5.0 for SimpleTools. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Chemguy ships an update every 41 months, SimpleTools weekly. The most recent releases landed on October 15, 2026 and October 19, 2026 respectively.

Scorecard4 real differences · 6 level
Chemguy versus SimpleTools: the parameters behind the verdict, then further details
ParameterChemguySimpleTools
PriceFreeFree
Rating5.0 (4 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings4 — better1
Update frequencyEvery 41 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better17
Further details — not scored
Size72 MB15 MB
Age rating4+4+
DeveloperRob LedererYevhenii Kniaziev

Customer experience

Chemguy

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews9 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

SimpleTools

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Chemguy

One-time1
  • Complete Chemguy Course EntryFree
2 purchases

SimpleTools

Subscriptions2
  • Premium Weekly$4.997 Days
  • Premium Yearly$29.991 Year

Questions

Is Chemguy free?
Chemguy is free to download, with in-app purchases available.
Is SimpleTools free?
SimpleTools is free to download, with in-app purchases available.
Which has better reviews, Chemguy or SimpleTools?
Chemguy and SimpleTools are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.
Do Chemguy or SimpleTools have ads?
Neither Chemguy nor SimpleTools shows ads.
Which is updated more often, Chemguy or SimpleTools?
Chemguy ships an update every 41 months, and SimpleTools weekly. Most recently, Chemguy was updated on October 15, 2026 and SimpleTools on October 19, 2026.

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