Alcyone: Chemistry Puzzle1.5.4 - App Store

Now, dive into chemistry!

Alcyone is a brain puzzle designed for those with a scientific curiosity. It helps those who want to learn chemistry more easily and enjoyably, while offering a challenging and engaging experience for chemistry enthusiasts. Users worldwide have already recognized its highly effective learning experience.

Build molecules and trigger reactions.

. Combine elements to synthesize a wide variety of molecules. Experience the vast world of chemistry and find joy in discovering over 1,300 real-world compounds.
. Compounds change through three phases-solid, liquid, and gas-depending on the ambient temperature. Their physical properties, where solids and liquids sink and gases rise, act as key variables in your puzzles.
. Place identical compounds in adjacent cells to trigger reactions. The more complex the elemental composition of the compound, the higher the score you earn, allowing you to find your own efficient scoring path.
. Your score increases exponentially as the number of reacting compounds grows and the chain reactions last longer. Strategize your placement to achieve the highest possible scores.
. From basic reactions like acid-base neutralization and hydrolysis to advanced organic chemistry, combine real-world chemical reactions to design and enjoy spectacular chain reactions.

Explore the periodic table and collect elements.

. Conquering numerous stages organized by atomic number, from Hydrogen (H, 1) to Krypton (Kr, 36), allows you to explore chemistry from basic to advanced levels step-by-step.
. Every time you complete a stage, you can collect new elements or unlock new chemical reactions that expand the possibilities of your experiments and your scientific toolkit.
. Upgrade each element to significantly boost your scoring efficiency. As you upgrade specific elements, the value of every compound containing them increases, letting you reach much higher scores.
. Acquire and upgrade organic functional groups to improve synthesis efficiency. Even compounds with complex structures can be created much more easily and quickly using upgraded functional groups.

Alcyone is continuously improved through regular updates. Focus entirely on the joy of chemistry without any in-app purchases or pop-up ads.

Version History • Fixed an issue where new molecules could be synthesized while neutralization, hydrolysis, dissolution, or other organic chemical reactions were in progress.
• Enhanced user privacy. Removed external SDKs used for ad tracking. 1.5.4 Sep 12 • Improved the data saving method to enhance stability. 1.5.3 Sep 7 • Optimized the data setup and sound loading logic, improving the initial loading speed.
• Fixed an issue where data could be corrupted if the app was force closed while saving game data. 1.5.2 Aug 30 • Fixed errors in the melting and boiling points of certain compounds. 1.5.1 Aug 26 • Added landscape mode support for iPad.
• Improved the UI layout of the top game information area on iPhone SE.
• Fixed an issue where some structural formulas were not displayed properly on iPad.
• Improved the overall UI layout of the top game information area.
• Added buttons in the bottom area to view "Remaining Elements" and "Statistics."
• Previously viewed page history is no longer reset when closing the molecule information page.
• You can now use the "Back" button on the molecule information page to revisit previously viewed pages.
• The first column (molecular formula) in the statistics data table is now fixed and excluded from horizontal scrolling.
• Enhanced data restoration reliability by periodically creating backup game data in case of data corruption. 1.5.0 Aug 17 • Reflected temperature variations in the color expression of text animations.
• Reflected temperature variations in the color expression of structural formula animations during molecule generation.
• Added positioning logic to ensure structural formula animations are correctly displayed within the screen boundaries.
• Adjusted the size of structural formula animations for iPad. 1.4.5 Apr 29 • Improved the visibility of text animations. 1.4.4 Apr 26 • Smoothed the reaction animation effects for liquid compounds. 1.4.3 Apr 22 • Added 63 new compounds, including chemical weapons and psychotropic drugs.
• Added resizing logic to prevent structural formulas on the information page from appearing too large.
• Changed the default font for Japanese and the animation font for Korean to improve readability.
• Refined the encyclopedia translations on the information page (Japanese, French, and Spanish). 1.4.2 Apr 16 • A new “Preview” feature has been added, allowing you to see compounds before they are generated. (This feature can be toggled in the Settings.)
• An option to toggle the text animations for compound names during generation and reactions has been added.
• The buttons on the Settings page have been changed to dropdown menus.
• Fixed an issue where the reaction between alkylboronic acid and hydrogen peroxide did not occur correctly.
• Improved the overall translation of the German encyclopedia.
• Reviewed and corrected Chinese (Simplified/Traditional) compound nomenclature.
• Fixed an issue where Chinese (Simplified/Traditional) compound names did not match the names in the encyclopedia. 1.4.1 Apr 8 FUNCTIONAL GROUPS

• Added a new type of Functional Group cell.
• Functional groups can be acquired by spending credits after clearing Stage 3 (Lithium). (Starting with the Methyl group)
• Subsequent stages allow sequential upgrades to other functional groups.
• Functional groups work the same way as element cells in the grid; they do not react on their own but combine with other elements or molecules to create new molecular cells.
• The list of obtainable functional groups starting from the Methyl group is as follows: Methyl, Ethyl, Propyl, Butyl, Pentyl, Hexyl, Heptyl, Octyl, Nonyl, Phenyl, Benzyl, Xylyl, Mesityl, Cinnamyl, Naphthyl, Vinyl, Allyl, Crotyl, Prenyl

TEXT ANIMATION

• Compound names are now displayed with text animations during formation and reactions.
• Optimized the display methods and related code for existing text animations (combos, scores, special reactions).
• Added a glowing shadow background effect to reacting cells that changes color (Blue/Red) according to temperature changes.
• Chain reaction numbers are now displayed sequentially when multiple types of compounds react simultaneously.
• Improved readability by adjusting the movement speed of temperature change text so it is not obscured by other text.
• The stage clear result window now appears after the score animation is fully completed.

SCORING CHANGES

• Updated the scoring method based on the number of chain effects.
• Changed the multiplier from linear (2x, 3x, 4x, 5x) to exponential (2x, 4x, 8x, 16x).
• The score multiplier for simultaneous cell reactions was also updated to an exponential method (4x for 3 cells, 8x for 4 cells).

IMPROVEMENTS AND FIXES

• Added new fonts for Korean, Japanese, and Chinese.
• Applied full-width indentation to the start of paragraphs in the Chinese encyclopedia.
• Fixed punctuation (commas and periods) to be centered in Traditional Chinese.
• Added sound effects for the Displace effect of noble gases (Helium, Neon, Argon, Krypton).
• Fixed an issue where molecular structures were not displayed in aqueous solutions.
• Corrected the molecular structure of formic anhydride.
• Updated the molecular formula of boric acid to B(OH)3.
• Removed background colors for metalloid element cells. 1.4.0 Mar 23 • Fixed errors in molecular formulas for some compounds: Ibogaminalog, Cocaine, Sparteine, Ketoprofen, Castanospermine 1.3.8 Feb 20 • Adjusted the maximum size of molecular structure animations to prevent them from obstructing the screen.

• Adjusted the transparency of molecular structure animations to make them appear more clearly.

• Modified the coordinate scale for melting and boiling point displays to a log scale to better visualize movement as values approach the target.

• Added new steroid compounds : Testosterone, Androstenedione, Dihydrotestosterone, Aldosterone, Estradiol, Estrone, Estriol, Cortisol, Progesterone, Calcitriol, Calcifediol 1.3.7 Feb 14 ADDING STAGE "REVERT" FEATURE

• If you fail to clear a stage but have enough credits, you can use them to "Revert" the stage and try again.

• The "Revert" cost is 200 credits at Stage 2 and increases by 40 credits for each subsequent stage.

• However, if you continue a game that was in progress in a previous version, restore points will not be available, limiting the "Revert" feature and causing the game to reset.
ADDING "UNDO" FEATURE

• An "Undo" button has been added to the bottom left of the screen to recover from input errors.

• The "Undo" feature cannot be used consecutively.
OTHER FIXES

• Fixed an issue where game information was displayed incorrectly on iPhone SE models. (Temporary measure: all info is accessible, but the UI is not finalized; it will be properly fixed when the layout design is overhauled)

• Fixed an issue where volume and theme settings were not maintained after app restarts or recovery from sleep mode.

• Fixed a visual bug where molecular structure animations were covered by bottom buttons.

• Fixed an issue where phosphoric, phosphorous, and hypophosphorous acids were incorrectly set as strong acids. These compounds no longer trigger neutralization reactions.

• Renamed alkylmagnesium halides to the more common term, "Grignard Reagent."

• Corrected the Chinese terminology for Grignard reagent compounds.

• Improved the readability of encyclopedia descriptions for sodium, magnesium, phosphorus, and sulfur compounds. 1.3.6 Feb 6 • Structural formulas are now displayed on the screen when creating a molecule or when a molecule reacts to earn points. 

• Improved the resizing logic for structural formula vector images in the Molecule Info page to remove unnecessary whitespace. 

• Added dynamic font scaling for the stat box in the Molecule Info page to ensure large numbers are displayed clearly. 

• Updated Amine naming conventions to follow common nomenclature (e.g., Methylamine) instead of IUPAC standards (e.g., Methanamine). 

• Modified the encyclopedia descriptions of some molecules for better readability. 

• Introduced over 100 new molecules with a focus on alkaloids: Ammonium Hydroxide, Ornithine, Quinolizidine, Ecgonine, Ecgonidine, Nornicotine, Cathinone, Ricinine, Quinazoline, Coniine, Caprylic Acid, Castanospermine, Swainsonine, Hygrine, Indolizidine, Retronecine, Tropinone, Theobromine, Spermidine, Pyrrolizidine, Niacin, Mevalonic Acid, Pipecolic Acid, Histamine, Uric Acid, Piperidine, Pyrrolidine, Allantoin, Muscimol, Thiazole, Oxazole, Cholesterol, Solanidine, Cyclopamine, Mitragynine, Voacangine, Lobeline, Colchicine, Noscapine, Laudanosine, Yohimbine, Coronaridine, Glaucine, Ajmalicine, Heroin, Hydrastine, Serpentine, Ajmaline, Ibogaine, Papaverine, Protopine, Camptothecin, Ibogamine, Sinomenine, Cinchonine, Naloxone, Thebaine, Amurensine, Capsaicin, Oxycodone, Liriodenine, Solenopsin, Secologanin, Galantamine, Aporphine, Troparil, Febrifugine, Lycorine, Lysergic Acid, Sparteine, Matrine, Physostigmine, Tropacocaine, Acridine, Cuscohygrine, Ibogaminalog, Harmine, Bufotenin, Mescaline, Pilocarpine, Salsoline, Cytisine, Gentianine, Spermine, Lupinine, Saxitoxin, Actinidine, Xanthosine, Tryptamine, and more. 1.3.5 Jan 22 • Added structural formulas to the Molecule Info page for organic compounds.

• Fixed molecular formula errors for the following compounds: Epinephrine, Harmaline, Imidazole, Chrysene, Borazine.

• Added 26 new compounds: Chorismic acid, Anthranilic acid, Paracetamol, Serotonin, Melatonin, Ketorolac, Mefenamic acid, Oxaprozin, Codeine, Benzydamine, Aspirin, Propofol, Ibuprofen, Salsalate, Naproxen, Nabumetone, Fenoprofen, Loxoprofen, Ketoprofen, Pelubiprofen, Indene, Indane, Purine, Indole, Indoline, Carbazole. 1.3.4 Jan 19 • Added GHS (Globally Harmonized System of Classification and Labelling of Chemicals) pictograms to the Molecule Info page to visually indicate the hazards of compounds.

• The hazard classification is based on the CLP (Classification, Labelling and Packaging) Regulation standards provided by the ECHA (European Chemicals Agency).

• Changed the cell color of reactive organic compounds from green to purple to improve distinction for users with red-green color blindness.

• Refined "Encyclopedia" descriptions for better readability and accuracy: C₆H₈O₇, C₇H₆O₃, C₆H₁₂O₇, C₆H₈O₆, C₂H₅NO₂, C₃H₇NO₂, C₅H₁₁NO₂, C₆H₁₃NO₂, C₉H₁₁NO₃, C₃H₇NO₃, C₅H₉NO₂, C₄H₉NO₃, C₃H₄O₃, C₄H₆O₃, C₅H₆O₅, C₄H₄O₅, C₆H₈O₅, C₅H₈O₃, C₄H₆O₄, C₃H₂O₅, C₅H₈O₄, C₃H₆O₃, C₄H₈O₄, C₅H₁₀O₅, C₅H₁₀O₄, C₆H₁₂O₆, C₆H₁₂O₅, C₇H₁₄O₇, C₁₂H₂₂O₁₁, CH₃F, C₂H₅F, HCOF, CH₃COF, C₆H₆, C₆H₅OH, C₆H₅CHO, C₆H₅NH₂, C₆H₅CONH₂, C₆H₅COOH, LiC₂H, LiOH, LiF, LiCl, LiClO, LiClO₃, LiClO₄, B₂H₆, CH₃B(OH)₂, C₂H₅B(OH)₂, BeH₂, BeO, Be(OH)₂. 1.3.3 12/24/2025 • Refined "Encyclopedia" descriptions for better readability and accuracy: N₂O₃, N₂O₄, N₂O₅, N₂H₂, NH₂NO₂, C₃O₂, C₂N₂, HNCO, C₂H₄, C₃H₆, C₄H₈, C₂H₂, C₃H₄, C₄H₆, CH₃CN, C₂H₅CN, CH₃NH₂, C₂H₅NH₂, C₃H₇NH₂, HCONH₂, CH₃CONH₂, C₂H₅CONH₂, C₃H₇CONH₂, C₃H₆N₆, C₃H₇OH, C₄H₉OH, C₅H₁₁OH, C₆H₁₃OH, C₂H₅CHO, C₃H₇CHO, C₄H₉CHO, C₂H₅COOH, C₃H₇COOH, C₄H₉COOH, C₅H₁₁COOH, C₆H₁₃COOH, (HCO)₂O, (CH₃CO)₂O, C₂H₄O₃, C₄H₆O₅, C₄H₆O₆, LiH, LiNH₂, LiOH, LiNO₃, LiCH₃, LiC₂H₅, LiC₇H₇, LiC₃H₇, LiC₆H₅, LiC₄H₉, BH₃, HBO₂, H₃BO₃, BN. 1.3.2 12/19/2025 • Added a framerate limit to address battery drain issues and improve device efficiency.

• Fixed an issue where the names of "Organic Chemical Reactions" in the Upgrades menu were displayed only in English.

• Refined "Encyclopedia" descriptions for better readability and accuracy: H₂, O₂, O₃, N₂, H₂O, H₂O₂, NH₃, NO, N₂O, NO₂, HNO₂, HNO₃, NH₂OH, N₂H₄, NH₄NO₃, NH₄NO₂, HN(NO₂)₂, NH₄N(NO₂)₂, CO, CO₂, H₂CO₃, CO(NH₂)₂, CH₄, C₂H₆, C₃H₈, C₄H₁₀, HCN, CH₃OH, C₂H₅OH, HCHO, CH₃CHO, HCOOH, CH₃COOH, F₂, HF, HF(aq), HSO₃F, H₂SO₄, HCl, HCl(aq), HOCl, HClO₃, HClO₄. 1.3.1 12/18/2025 ■ LOCALIZATION

• Added full translation for French, German, Spanish, Japanese, Korean, and Chinese (Simplified/Traditional).

• The app now automatically detects your device's language settings.

• You can manually change the language in the Settings menu at any time.

■ UI IMPROVEMENTS

• Added subtle shading to cells to improve text readability.

• Adjusted text wrapping and sizing for element/molecule names.

• Renamed bottom navigation buttons to be more intuitive.

• Optimized app size by removing unused font sets.

■ ACADEMIC DATA UPDATES

• Completely rewrote the "Encyclopedia" content and added descriptions for Functional Groups.

• Added "Azide" to the Functional Groups list.

[ Formula Corrections ] Glycolic acid (C2H4O3), Melamine (C3H6N6), Levulinic acid (C5H8O3), Mesoxalic acid (C3H2O5), Malic acid (C4H6O5), Tartaric acid (C4H6O6), Citric acid (C6H8O7), Salicylic acid (C7H6O3), Gluconic acid (C6H12O7), Ascorbic acid (C6H8O6), Ambrettolide (C16H28O2), Squalene (C30H50), Pyrene (C16H10).

[ Link Fixes ] C4H6O4 (Succinic acid), C20H32 (Cembrene), C6H8O5 (Beta-ketoadipic acid), C8H11NO2 (Dopamine), C11H17NO3 (Epinephrine), C4H8N2 (Succinonitrile), C5H6N2 (Aminopyridine), C10H20O (Menthol), C14H18N2O5 (Aspartame), C13H20O (Lassanol).

[ Removed Data (Unclear/Redundant) ] C6H6N2, C4H4N4, C5H5N3, C15H16O6, C4H6O2, C6H8O3, C5H8O2, C6H10O2, C4H8O2, C7H14O2, C14H22O, MgC4H6O4, SiH6O2, Si2H6O3, SiH5O, SiOCl2, P2H6, C2H4S2, C5H11NOS, C9H11NO2S, C4H7NOS, C10H16S, C13H24S, C16H30O2S, C11H18OS, C12H22S2, (NH4)2SO6, H2NCl2O, H2OCl2, N2H4Cl, N2H6Cl2, Co(CO)4NO.

[ Removed Alloys ] MgSi, FeSi, AlSi, CuSi, ZnSi. 1.3.0 12/16/2025 • A new "Settings" page has been added to the application.
• This page includes controls for Theme Mode (Light/Dark) and Audio Volume settings.
• The Game "Restart" button has also been included on the "Settings" page. 1.2.2 11/27/2025 • Fixed an issue where the game could no longer proceed, displaying a white screen after unlocking all available upgradable organic chemistry reactions and a new upgrade page opened.
• Added Carbonic Acid (H2CO3) to the list of molecules. 1.2.1 11/24/2025 Visual / UI Improvements

• Dark Mode has been added.
• Light Mode and Dark Mode now automatically adjust based on the device's brightness setting.
• When points are gained from cells in a liquid or solid state, the cell text color changes to blue to reflect temperature changes. (Gases remain red)
• The color of special reaction cells has been adjusted to match the theme color of their constituent elements. (Alkylboronic Acids, Alkyl Halides, Acyl Halides, and strong basic compounds containing Magnesium/Calcium)

Saving and Statistics Features Added

• The app now saves the game state when deactivated and restores the last ongoing game upon initialization.
• "Lifetime" Statistics have been introduced, allowing users to view all previously created compounds on the statistics page, even after starting a new game.
• The "Discovery" count for elements displayed on the Information page is now calculated based on Lifetime Statistics.
• An "Expand" button has been added to the statistics page to allow detailed viewing on iPhone. (iPhone)
• "Average Chain" and "Average Molecules" columns have been added to the statistics table.

Convenience Improvements (QoL)

• In the "Combination" tab of the Information page, tapping on another element or molecule now immediately opens its respective information page.
• Users can return to previously viewed element/molecule information pages using the "Back" button at the bottom of the Information page.
• The width of the buttons at the bottom of the Information page has been widened for easier interaction. (iPhone) 1.2.0 11/21/2025 • Fixed several display-related bugs. 1.1.7 11/11/2025 • Fixed an issue where the chain effect from "displace" of noble gases — such as helium, neon, argon, and krypton — would not accumulate in subsequent reactions. 1.1.6 11/09/2025