Comparison

AL CHEM vs LIYSF

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

Head to head
About

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.

Highlights
  • A Level Chemistry teaching notes
  • Flash cards for revision
  • Quizzes with explanations
  • Useful chemistry learning tools
Features
Read full description

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!

About

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.

Highlights
  • 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)
Features
Read full description

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

AL CHEM4 screens
LIYSF3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
AL CHEM versus LIYSF: the parameters behind the verdict, then further details
ParameterAL CHEMLIYSF
Price$11.99Free — better
Rating5.0 (8 ratings) — better4.0 (1 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings8 — better1
Update frequencyEvery 4 monthsEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size60 MB85 MB
Age rating4+4+
Developer东东 张Gustav Brochmann

Customer experience

AL CHEM

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews40 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

LIYSF

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

AL CHEM

One-time2
  • Flash Cards$4.99
  • Test$5.99
None

LIYSF

No in-app purchases

Questions

Is AL CHEM free?
AL CHEM costs $11.99, and also offers in-app purchases.
Is LIYSF free?
LIYSF is free to download, with no in-app purchases.
Which has better reviews, AL CHEM or LIYSF?
AL CHEM is rated higher. AL CHEM averages 5.0 out of 5 from 8 ratings, while LIYSF averages 4.0 from 1 ratings.
Do AL CHEM or LIYSF have ads?
Neither AL CHEM nor LIYSF shows ads.
Which is updated more often, AL CHEM or LIYSF?
AL CHEM ships an update every 4 months, and LIYSF every 2 days. Most recently, AL CHEM was updated on October 20, 2026 and LIYSF on October 24, 2026.

Other comparisons