# V-SPER — VSEPR > Educational app for visualizing VSEPR theory and molecular geometry. (iPhone/iPad app by Joazco.) - Source: https://appshunter.io/ios/app/v-sper/id1640675919 (this page in markdown: same URL + `.md`) - Developer: [Joazco](https://appshunter.io/developer/1596140688) - Category: Education - Price: Free - Rating: 4.00/5 from 4 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 15 MB - Languages: American English - Released: 2022-10-06 - Data updated: 2026-08-06 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/v-sper/id1640675919/reviews.md ## What is V? Build and observe to come true with figures of repulsion, geometry, angles. V-SPER, free application, is a support for the teaching of the VSPER theory (Valence Shell Electron Pair Repulsion). This theory makes it possible to predict the geometry of molecules from the sole electrostatic repulsion of valence electron pairs. It is based on the Lewis model of distribution of the valence electrons of the atoms concerned. The latter is a prerequisite to take full advantage of V-SPER. The molecule is denoted AXnEm. The atoms (or portions of molecules) linked to the central atom A are denoted X (n: number of X, whether they are linked by single or multiple bonds). The non-bonding electron pairs belonging to the central atom A and not being involved in bonds are denoted E (m: number of E). V-SPER allows to build simple and 3D objects (molecules) and to display the repulsion figure in blue (FigREP), the molecular geometry in yellow (Geom) as well as the angles. Some angles are just modeled and do not always correspond to experimentally measured angles, such as the relative lengths of single or multiple bonds ## Key features - Build 3D molecular models - Observe repulsion figures - Display molecular geometry - Visualize bond angles - Supports VSEPR theory - Based on Lewis model ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/v-sper/id1640675919/reviews.md ### 2/5 — Scientifically incorrect *2024-10-23* A good visualiser for 3D molecules, fine for showing bond angles - UNLESS the molecule contains lone pairs. Lone pairs are treated as bonded regions, meaning the bond angles for pyramidal and non-linear molecules are incorrect. ### 1/5 — it’s really easy to use and it helps me so much *2023-11-11* I do recommend it ## Frequently asked questions about V ### What is V-SPER used for? V-SPER is an educational application designed to support the teaching and learning of VSEPR theory. It allows users to build and observe 3D molecular models, visualizing repulsion figures, molecular geometry, and angles. ### Is V-SPER free to use? Yes, V-SPER is a free application. It does not require any payment to download or use its features. ### What devices does V-SPER support? V-SPER is available for iPhone and iPod devices. It is designed to run on Apple's mobile operating system. ### What is the age rating for V-SPER? V-SPER has an age rating of 4+. This indicates it is suitable for users aged four and above, making it accessible for younger learners in an educational context. ### How often is V-SPER updated? The latest version of V-SPER is 2.0.0, released on 2025-11-02. While specific update frequency isn't detailed, the app has seen recent updates, suggesting ongoing development. ### Does V-SPER have ads? No, V-SPER does not contain advertisements. As a free application, it provides an ad-free experience for its users. ### What is the user rating for V-SPER? V-SPER currently has a rating of 3.0 stars based on 2 ratings. This suggests a mixed but generally positive reception from its user base. ### What prerequisites are needed to use V-SPER effectively? To fully benefit from V-SPER, users should have a foundational understanding of the Lewis model for valence electron distribution. This model is a prerequisite for understanding how V-SPER predicts molecular geometry. ## Version history (last 5 releases) ### 2.1.0 — 2026-08-04 Updated to the latest iOS version with various improvements and bug fixes. ### 2.0.0 — 2025-11-02 V-SEPR – A tool that allows you to model the geometry of molecules based on VSEPR theory (3D), now with the added ability to build Lewis structures directly within the application (2D) — a new feature. Build and observe to become familiar with Lewis structures, repulsion shapes, molecular geometry, and bond angles. You can now navigate between 3D and 2D representations. We look forward to your feedback! ### 1.6.0 — 2025-07-08 App update to meet the latest iOS requirements. ### 1.5.1 — 2024-11-04 - Added haptic feedback on button click - Fixed multiple bugs ### 1.5.0 — 2024-09-20 Update to the latest version of iOS ## More apps by Joazco - [Dark Blue Dungeon](https://appshunter.io/ios/app/dark-blue-dungeon/id1604755796) - [Comic Space Game](https://appshunter.io/ios/app/comic-space-game/id6462151586) All apps by Joazco: https://appshunter.io/developer/1596140688 --- *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 2026-08-06.*