AL CHEM vs LIYSF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AL CHEM
Enhance your A-Level Chemistry studies with comprehensive teaching notes, interactive flashcards, and quizzes. This app provides useful tools to aid your learning journey in chemistry.
- A Level Chemistry teaching notes
- Flash cards for revision
- Quizzes with explanations
- Useful chemistry learning tools
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This app is designed to improve your learning experience. In this App, you can find or do the followings: 1. My teaching notes of A Level Chemistry; 2. Flash Cards; 3. Quiz with brief explanations; 4. Some useful tools for learning chemistry If you are a student who is studying A-Level, AP, or SAT Chemistry , this app will be very helpful to your study!
LIYSF
This app provides information about a two-week STEM summer camp in the UK, offering lectures, lab visits, and cultural interaction for students aged 16-21. It aims to deepen insight into science and its applications for humankind.
- STEM summer camp details
- Online and in-person options
- Lectures from leading scientists
- Scientific visits to labs and universities
- International cultural interaction
- Skill development (communication, problem-solving)
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The London International Youth Science Forum CIC (LIYSF CIC) offers a two-week STEM summer camp in the UK, held both online and in-person, at Imperial College London & The Royal Geographical Society. Each year, 500 students aged 16-21 years old from 70 countries enjoy our 15-day STEM summer camp, with lecture demonstrations from leading scientists, scientific visits to world-class laboratories and scientific universities, combined with international cultural interaction. Founded in 1959, the London International Youth Science Forum is a STEM summer camp in the UK, that aims to give a deeper insight into science and its applications for the benefit of humankind. LIYSF CIC is a not-for-profit social enterprise. STEM careers have seen an unprecedented rise in the 21st century, and it is fair to assume our dependence on science and technology will increase in the years to come. Enrol in our STEM Summer Camp in the UK and get the opportunity to develop core skills like – communication, real-world problem-solving and analytical thinking.
Screenshots
Verdict
The clearest difference is price: LIYSF at Free against AL CHEM's $11.99. LIYSF also leads on in-app purchases (none vs 2) and update cadence (every 2 days vs every 4 months). AL CHEM's advantage is rating (5.0 vs 4.0) and ratings volume (8 vs 1). On review sentiment, 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
LIYSF is free to download; AL CHEM costs $11.99 up front. AL CHEM sells 2 one-off in-app purchases. LIYSF asks for nothing beyond the download.
AL CHEM holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: AL CHEM has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.
AL CHEM ships an update every 4 months, LIYSF every 2 days. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.
| Parameter | AL CHEM | LIYSF |
|---|---|---|
| Price | $11.99 | Free — better |
| Rating | 5.0 (8 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 4 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 60 MB | 85 MB |
| Age rating | 4+ | 4+ |
| Developer | 东东 张 | Gustav Brochmann |
Customer experience
AL CHEM
LIYSF
In-app purchases
AL CHEM
- Flash Cards$4.99
- Test$5.99
LIYSF
No in-app purchases









