Structura: Element Synthesis
Learn reactions as you play
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Units 1-3 are free to play in full. One purchase unlocks 32 more stages, 217 more Codex entries and Free Experiment mode. No ads, no subscriptions, no stamina.
LEARN CHEMICAL REACTIONS WITH A FALLING-BLOCK PUZZLE
Drop elements and ions, place them side by side, and they combine.
H plus O makes −OH. Add another H and you have H₂O.
A compound forms only when the bonds and charges add up.
Instead of turning textbook pages, you build each reaction with your own hands.
WHAT'S INSIDE
356 reactions across inorganic, organic and polymer chemistry (308 in the Codex), in 46 stages.
- From atoms to molecules
- Making gases, and the halogens
- Metals, oxides and industrial methods (contact process, Ostwald process, ammonia-soda process, blast furnace)
- Acids, bases, neutralization and salts
- Redox and ionization tendency (permanganate, dichromate, iodometric titration)
- Metal ion precipitates and complex ions
- Aliphatic compounds (oxidizing alcohols, esterification, silver mirror test, iodoform test)
- Aromatic compounds (nitration, sulfonation, diazotization, azo dyes, cumene process)
- Polymers (sugars, amino acids, protein tests, resins, rubber, vinylon)
This app is about reactions. It does not cover calculation topics such as moles, equilibrium, electrochemistry, thermochemistry or crystal lattices.
The content follows the Japanese high school chemistry curriculum, so some topics and terms may differ from your course.
BUILT TO BE SEEN
Benzene is drawn as a hexagon, glucose as a ring, starch as linked rings.
Precipitates sink to the bottom and gases escape upward, in their real colors.
PRACTICE RECALLING
- A 3-question quiz after each stage, with the product hidden
- A Test mode in the Codex that masks the products
- Reactions you miss come back in later quizzes, and their materials fall more often
SET UP THE CONDITIONS YOURSELF
Heat, electrolysis, light and catalysts are devices you use on the whole flask. You decide when to use them.
FREE EXPERIMENT MODE
With the full unlock, choose what falls, in the order you like, and try your own combinations. No targets and no material limit.
MEET THE ELEMENTS
Each of the 46 stages introduces a character who teaches the key point of that topic, in a short conversation with Mol, an apprentice chemist.
PRICING
Units 1-3 (14 stages, 91 Codex entries) are free.
A one-time purchase unlocks everything else.
- No additional charges
- No subscriptions
- No ads
- No gacha
- No stamina
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Structura is now available in English. The game appears in English on any device not set to Japanese.
The developer, SNAPLACE, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- SNAPLACE LLC
- Size
- 104.8 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Unlock All Units $2.99
- Copyright
- © 2026 SNAPLACE