Chemguy vs SimpleTools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Over 200 video lessons
- Comprehensive classroom notes
- 1000+ practice problems
- 100+ interactive quizzes
- Unit exams
- Direct messaging support
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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
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.
- AI-powered problem solving
- Photo scanning for problems
- Step-by-step explanations
- Supports various chemistry topics
- Unlimited scans with premium
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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
Verdict
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
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.
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.
Chemguy ships an update every 41 months, SimpleTools weekly. The most recent releases landed on October 15, 2026 and October 19, 2026 respectively.
| Parameter | Chemguy | SimpleTools |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 41 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 17 |
| Further details — not scored | ||
| Size | 72 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Rob Lederer | Yevhenii Kniaziev |
Customer experience
Chemguy
SimpleTools
In-app purchases
Chemguy
- Complete Chemguy Course EntryFree
SimpleTools
- Premium Weekly$4.997 Days
- Premium Yearly$29.991 Year









