# Atom Worldbox — Epic Chemistry Sandbox > Epic Chemistry Sandbox (iPhone/iPad app by GEOCO YAZILIM ANONIM SIRKETI.) - Source: https://appshunter.io/ios/app/atom-worldbox/id6782131732 (this page in markdown: same URL + `.md`) - Developer: [GEOCO YAZILIM ANONIM SIRKETI](https://appshunter.io/developer/6782131734) - Category: Education, Games, Simulation - Price: Free with in-app purchases - Age rating: 4+ - Requires: iOS 15.0 · 22 MB - Languages: English, Turkish - Released: 2026-07-02 - Data updated: 2026-07-25 - User reviews in markdown: https://appshunter.io/ios/app/atom-worldbox/id6782131732/reviews.md ## What is Atom Worldbox? The entire periodic table is yours to play with. Drop atoms onto the screen, watch them bond into real molecules, and trigger genuine chemical reactions all driven by real science, not scripted animations. Atom Worldbox is an open-ended chemistry and physics sandbox. There are no levels, no goals, and no rules just a living world of atoms governed by the same forces that shape the real universe. Bring two elements together and see whether they bond. Build a known molecule and the app recognizes it instantly. Push reactive elements together and watch reactions ignite, transform, and settle on their own. WHAT YOU CAN DO • Experiment with every element on the periodic table • Watch atoms form covalent, ionic, and metallic bonds based on real chemistry • Build molecules and see them automatically identified • Trigger authentic chemical reactions and watch them unfold naturally • Turn on Thermal Mode: heat and cool your world — condense gases into droplets, boil them, or fuse hydrogen at star-core temperatures • Explore radioactivity, isotopes, and natural decay • Set off chain reactions and watch them cascade across your world • Zoom, pan, and arrange everything with simple, intuitive touch controls REAL SCIENCE, NOT SPECIAL EFFECTS Every bond and reaction is calculated from real chemical and physical principles. Atoms attract and repel, electrons transfer, and molecules come together exactly the way they would in nature. It's a living simulation you can build, break, and rebuild as many times as you like. GREAT FOR • Curious minds who love to experiment and explore • Students discovering chemistry and physics • Teachers looking for an interactive way to show bonding and reactions • Anyone who loves satisfying, science-driven simulations Works fully offline. No account required, no clutter—just open it and start building. Atom Worldbox is free to explore. Upgrade to Pro to unlock the complete sandbox experience. ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Atom Worldbox Pro | $1.99 | one-time | ## Version history (last 5 releases) ### 1.6 — 2026-07-24 Temperature system overhauled! • Temperature now affects reactions too: heating speeds up chemistry, cooling slows it, absolute zero freezes it • At star-core heat, all strong bonds now break (including HF) N₂ and CO hold out longest • Rebalanced temperature slider with live value and zone labels ("Room", "Weak bonds break", "Star core"...) • The scene glows ember red as it heats up; breaking bonds flash with sound and haptics • School package improvements: students now activate Pro access directly through the App Store. • Minor bug fixes and improvements. ### 1.4.5 — 2026-07-13 Search button added. Fixing between molecules angle. ### 1.4 — 2026-07-07 47 new reactions: combustions, acid-base, metal + acid, and industrial classics. The classic chemistry set now has 83 rules. 18 new compounds are now recognized by name (FeCl₂, NO₂, methanol, new salts…). Lightning chemistry: smash N₂ + O₂ together fast and NO forms You can now also place atoms by dragging and dropping them from the left panel. Tidier molecule list, more stable reaction formation. Fixed freezing/crashing at launch on devices running iOS 17 and earlier. ### 1.3 — 2026-07-07 •⁠ ⁠Smoother reactions — products now assemble in place with natural recoil instead of teleporting •⁠ ⁠Tutorial expanded: chain fission (U-235) and hydrogen combustion are now guided tutorial steps •⁠ ⁠Clearer tutorial hints and fine-tuned preset compounds •⁠ ⁠Performance improvements and bug fixes ### 1.2 — 2026-07-05 Big chemistry update! • Performance improvements in scenes with many atoms. • Refined reaction system: improvements across dozens of reactions — acid-base, combustion, metal oxidation, rusting, ammonia synthesis. • More realistic physics: true atomic masses, bond energies, molecular angles (water 104.5°), hydrogen bonds, activation energy. • 80 recognized compounds: SO₂, SF₆, PCl₅, XeF₂, O₃… • The Sun's pp chain and realistic fission. • Calm scene with thermal mode off + visible boundary ring. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-25.*