--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Zperiod - Periodic Table" developer_entity: "Alejandro Hernandez Mitre" bundle_id: "com.mitre88.zperiod" app_store_id: "6761690452" google_play_id: "com.zakirshikhli.mendeleyevcedveli" category: "Education" primary_platform: "ios" primary_monetization: "Freemium" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-04-07" report_date: "2026-06-04" last_verified: "2026-06-04T10:15:31.787Z" report_version: "1.0" total_reviews: 0 confidence: "low" confidence_score: 0.3 data_age_days: 27 intelligence_version: 5 nemesis: "Star Gazer & Night Sky Map" competitor_count: 11 tags: ["education", "freemium", "mobile app", "app review", "app analysis", "chemistry", "students,", "educators,"] canonical_url: "https://marlvel.ai/intel-report/education/com-mitre88-zperiod" license: "CC-BY-NC 4.0" content_version: "v2" --- # Zperiod - Periodic Table App Audit ## TL;DR {#tldr} - **Category**: Education · Freemium > **TL;DR:** Zperiod - Periodic Table is a education app by Alejandro Hernandez Mitre, available on iOS & Android. > > **Marlvel.ai App Intelligence** — Independent analysis. US Market. No publisher influence. > **Key Insight:** Zperiod - Periodic Table is a education app by Alejandro Hernandez Mitre. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Education | | **Developer** | Alejandro Hernandez Mitre | | **Pricing** | Freemium | | **Platforms** | iOS & Android | | **Confidence** | Low (0.3/1.0) | | **Data Age** | 0d | ## Metadata & Market Performance - **Publisher:** Alejandro Hernandez Mitre - **Category:** Education - **Target Audience:** Chemistry students, educators, and science enthusiasts seeking interactive study tools and printable resources. - **Platforms:** iOS & Android - **Version Audited:** 1.0 - **Audit Date:** 2026-06-04 - **Signal Count:** 28 reviews analyzed - **Confidence:** Low (0.3/1.0) - **App Store ID (iOS):** 6761690452 - **Bundle ID:** com.mitre88.zperiod - **Google Play ID:** com.zakirshikhli.mendeleyevcedveli - **Performance Trend:** Mixed - **Data Window:** Analysis based on signals collected up to 2026-06-04 - **Short Description:** Essential chemical element guide with photos, facts, and offline search ## Executive Snapshot **What it is:** Zperiod is a chemistry education app for iOS and Android featuring 3D Bohr models, an equation balancer, and a worksheet generator. **Why users hire it:** Students and educators hire Zperiod to visualize complex atomic structures and automate chemistry calculations, serving the need for specialized academic utility. ## App DNA (Features & Intent) - **[Differentiator] 3D Bohr Atom Models:** Interactive models using SceneKit to rotate, zoom, and explore electron shells - **[Differentiator] Chemical Equation Balancer:** Tool using a Gaussian elimination algorithm to balance equations with an animated scale - **[Differentiator] Worksheet Generator:** Tool to create and export printable PDF chemistry worksheets with configurable difficulty ## Market Position {#market-position} Zperiod maintains a niche presence in the Paid Education category across multiple international markets, though recent rank volatility (e.g., ↓14 in Poland, ↓20 in Australia) indicates difficulty sustaining chart visibility. ## Monetization Strategy - **Model:** Freemium - **Tiers:** iOS: $2.99 one-time purchase, Android: Free - **Price:** iOS: $2.99 - **Analysis:** The iOS version utilizes a paid model to gate premium visualization features, while the Android version functions as a free utility. ## SWOT Analysis {#swot} **Core Strengths:** - 3D Bohr atom models enable high-fidelity visualization for chemistry-specific curriculum needs **Critical Frictions:** - Split-platform pricing ($2.99 iOS vs Free Android) creates inconsistent brand value **Growth Levers:** - Classroom integration and teacher-focused bulk licensing offer a path to stable B2B distribution **Market Threats:** - Established educational tools with community-driven data provide network effects that Zperiod lacks ## Recent Changes (v4 → v5) {#recent-changes} Zperiod transitioned from a general feature-focused roadmap to a targeted strategy addressing platform-specific pricing friction and B2B classroom integration. **Overall trend**: Mixed **Compared at**: 2026-06-04 ### High-impact changes - **[Shifted] Market Visibility Status** (positioning) — Market position shifted from a stable multi-market presence to reporting specific rank volatility (e.g., ↓14 in Poland, ↓20 in Australia). - **[Shifted] Strategic Roadmap Pivot** (positioning) — PM action items shifted from a singular focus on freemium conversion to a dual-track strategy of unifying pricing and developing classroom-sharing features. ### Medium-impact changes - **[Shifted] Weakness Reclassification** (swot) — Weakness focus shifted from 'Lack of community features' to 'Split-platform pricing ($2.99 iOS vs Free Android) creates inconsistent brand value'. ## Rivals Landscape {#rivals} > Competitive positioning identified by AI analysis of app features, category, and market signals. ### Zperiod - Periodic Table vs Star Gazer & Night Sky Map — Head to Head - **[Star Gazer & Night Sky Map](https://marlvel.ai/intel-report/education/star-gazer-night-sky-map)** by Appelio: This app competes for the same 'educational discovery' user base, capturing students and hobbyists interested in scientific visualization and interactive exploration of the natural world. - **Key differences:** - Massive user base and community-driven data provide a significant network effect advantage over Zperiod - Real-time sky mapping offers a dynamic, location-aware experience that Zperiod's static element data lacks - Open source community integration fosters higher user retention compared to Zperiod's closed-loop educational model - **Where Zperiod - Periodic Table wins:** - ✅ Provides specialized, high-fidelity 3D Bohr atom models for chemistry-specific curriculum needs - ✅ Includes integrated tools for generating printable chemistry worksheets, offering direct utility for students - **Where Star Gazer & Night Sky Map wins:** - ❌ Leverages massive scale and social proof with nearly half a million ratings - ❌ Offers real-time AR sky mapping that provides immediate, high-engagement value to casual users - **Verdict:** Zperiod should pivot toward niche academic utility and classroom integration to avoid direct competition with high-scale, general-interest educational tools. ### Contenders (Strong Challengers) - **[Periodic Table 2025: Chemistry](https://marlvel.ai/intel-report/education/periodic-table-2025-chemistry)** by Darian Orn: Direct functional overlap in the chemistry education space, targeting students looking for a quick-reference periodic table. - Offers a dedicated study mode that simplifies the learning process for exam-focused students - Maintains a minimalist, lightweight interface that prioritizes speed over Zperiod's complex 3D visualizations - **[HeartVision](https://marlvel.ai/intel-report/medical/heartvision)** by Usama Nasir: Competes for the 'visual science' market segment by utilizing 3D modeling to explain complex biological systems. - Focuses on medical-grade 3D heart models which appeal to a more specialized, high-intent audience - Utilizes looped video content to explain physiological processes, providing a different pedagogical approach than Zperiod - **[Geology Toolkit: Field Guide](https://marlvel.ai/intel-report/education/geology-toolkit-field-guide)** by Laurence Wayne: Targets the same STEM-focused demographic by providing AI-driven identification tools for scientific field study. - Integrates AI-powered identification for physical specimens, a feature Zperiod lacks for chemical elements - Provides formation analysis tools that offer deeper scientific context than Zperiod's static element properties - **[Astronomy Observer](https://marlvel.ai/intel-report/reference/astronomy-observer)** by 雪平 王: Competes for the attention of science-curious users who value reference-heavy, data-driven educational applications. - Includes complex ephemeris calculations that cater to advanced users beyond the scope of Zperiod - Provides a comprehensive celestial catalog that serves as a deep reference library for astronomy enthusiasts ### Peers (What They Do Better) - **[GeoForge Academy](https://marlvel.ai/intel-report/education/com-galanisgalactus-geoforgeacademy)** by ZACHARY MASON KELLER: Shares the same 'gamified education' positioning, focusing on student engagement through interactive elements. - Incorporates interactive mini-games to reinforce learning, whereas Zperiod relies on visual models - Includes built-in progress tracking features to help students monitor their academic development over time - **[Planet Patrol](https://marlvel.ai/intel-report/education/planet-patrol)** by Plastic Patrol CIC: Operates in the educational space with a focus on community-driven data collection and environmental awareness. - Utilizes crowdsourced data collection to drive real-world impact, unlike Zperiod's static reference content - Features global impact tracking that gamifies environmental stewardship for a broader, non-academic audience - **[DrPhos' Stoichiometry](https://marlvel.ai/intel-report/education/drphos-stoichiometry)** by Monte L Helm: Directly addresses the chemistry student market with specialized calculation tools for stoichiometry. - Provides a dedicated stoichiometry calculator that is more specialized than Zperiod's general equation balancer - Offers integration with GenChem helper tools, creating a more cohesive workflow for chemistry students - **[Chemical Solution Simple](https://marlvel.ai/intel-report/education/chemical-solution-simple)** by Roman Volinsky: Targets the practical application side of chemistry education, focusing on lab-based calculations. - Focuses specifically on chemical solution preparation and concentration, a niche utility Zperiod lacks - Supports multi-unit concentration calculations, providing more technical depth for laboratory-focused users ### New Kids on the Block (What's Innovative) - **[ChemCalc - Mole Calculator](https://marlvel.ai/intel-report/education/chemcalc-mole-calculator)** by Paul Leadbeater: A new entrant focusing on the calculation-heavy aspects of chemistry, directly challenging Zperiod's utility features. - Features interactive formula triangles that provide a unique, visual way to solve mole calculations - **[Sourcify](https://marlvel.ai/intel-report/education/sourcify)** by Edomiyas Temesgen: A newcomer in the education space leveraging AI to organize subject discovery, competing for student study time. - Uses AI-powered subject discovery to help students organize their learning path across multiple disciplines ## App Momentum (Steady) {#momentum} - Ships periodic table and 3D models. - Maintains multi-market Paid Education presence. ## The "So What?" (Strategic Takeaway) {#so-what} Zperiod - Periodic Table is an established education app that is free with in-app purchases. > **Bottom Line:** Zperiod provides high-fidelity chemistry visualization tools that outperform general-interest apps, but the inconsistent pricing strategy limits its ability to scale across platforms, so the PM should prioritize a unified monetization model to stabilize the user base. **Best for:** Chemistry students, educators, and science enthusiasts seeking interactive study tools and printable resources. ### PM Action Plan (Next Best Moves) - [ ] [PIVOT] [HIGH IMPACT] Unify pricing model across platforms — *The current iOS-paid/Android-free split creates brand confusion and friction for cross-platform users.* _(trade-off: deprioritize Pause the development of new 3D models to focus engineering on billing infrastructure.)_ - [ ] [INVEST] [MEDIUM IMPACT] Ship classroom-sharing features — *Teacher-led adoption is the primary B2B distribution channel for educational tools.* _(trade-off: deprioritize Deprioritize the Android UI refresh to allocate resources to the sharing backend.)_ ### Feature Gaps vs Competitors - AI-powered specimen identification (available in Geology Toolkit: Field Guide but absent here) - Interactive mini-games (available in GeoForge Academy but absent here) ### Outlook: Mixed The chemistry education market is consolidating around tools that offer both high-fidelity visualization and seamless classroom integration. Zperiod is currently exposed due to its fragmented pricing, which prevents it from building the brand authority necessary to defend against more agile, AI-integrated competitors. - 🔴 Recent rank volatility across international markets suggests the current paid-iOS/free-Android model is failing to maintain consistent user acquisition momentum. - ⚪ The app maintains a steady feature set, but lacks the update cadence required to compete with AI-driven educational entrants. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Freemium | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Trend | Mixed | | Outlook | Mixed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Zperiod - Periodic Table** (this app) | N/A/5 | N/A | Alejandro Hernandez Mitre | | [GeoForge Academy](https://marlvel.ai/intel-report/education/com-galanisgalactus-geoforgeacademy) | 5.0/5 | N/A | ZACHARY MASON KELLER | | [Astronomy Observer](https://marlvel.ai/intel-report/reference/astronomy-observer) | 4.6/5 | N/A | 雪平 王 | | [Star Gazer & Night Sky Map](https://marlvel.ai/intel-report/education/star-gazer-night-sky-map) | 4.7/5 | Thrilled | Appelio | | [HeartVision](https://marlvel.ai/intel-report/medical/heartvision) | 5.0/5 | N/A | Usama Nasir | | [DrPhos' Stoichiometry](https://marlvel.ai/intel-report/education/drphos-stoichiometry) | 5.0/5 | N/A | Monte L Helm | ## Company Profile - **Developer:** Alejandro Hernandez Mitre - **Website:** [https://www.facebook.com/shikhli](https://www.facebook.com/shikhli) - **Social:** [Instagram](https://www.instagram.com/meta) · [Facebook](https://www.facebook.com/Meta) · [X/Twitter](https://twitter.com/Meta) · [YouTube](https://www.youtube.com/meta) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/zperiod-periodic-table/id6761690452?uo=2) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=com.zakirshikhli.mendeleyevcedveli&hl=en&gl=us) - **Dev Site:** [Official Website](https://www.facebook.com/shikhli) - **Sources:** About us / company information, App store metadata. ## Related Intel Reports - [*GeoForge Academy*](https://marlvel.ai/intel-report/education/com-galanisgalactus-geoforgeacademy) (ZACHARY MASON KELLER) — 5.0/5 Rating | N/A Sentiment - [*Astronomy Observer*](https://marlvel.ai/intel-report/reference/astronomy-observer) (雪平 王) — 4.6/5 Rating | N/A Sentiment - [*Star Gazer & Night Sky Map*](https://marlvel.ai/intel-report/education/star-gazer-night-sky-map) (Appelio) — 4.7/5 Rating | Excellent Sentiment - [*HeartVision*](https://marlvel.ai/intel-report/medical/heartvision) (Usama Nasir) — 5.0/5 Rating | N/A Sentiment - [*DrPhos' Stoichiometry*](https://marlvel.ai/intel-report/education/drphos-stoichiometry) (Monte L Helm) — 5.0/5 Rating | N/A Sentiment - [*ChemCalc - Mole Calculator*](https://marlvel.ai/intel-report/education/chemcalc-mole-calculator) (Paul Leadbeater) — N/A Rating | Excellent Sentiment - [*Periodic Table 2025: Chemistry*](https://marlvel.ai/intel-report/education/periodic-table-2025-chemistry) (Darian Orn) — 5.0/5 Rating | Excellent Sentiment - [*Geology Toolkit: Field Guide*](https://marlvel.ai/intel-report/education/geology-toolkit-field-guide) (Laurence Wayne) — 4.6/5 Rating | N/A Sentiment - [*Sourcify*](https://marlvel.ai/intel-report/education/sourcify) (Edomiyas Temesgen) — N/A Rating | N/A Sentiment - [*Planet Patrol*](https://marlvel.ai/intel-report/education/planet-patrol) (Plastic Patrol CIC) — 5.0/5 Rating | N/A Sentiment ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** — Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** — Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** — Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction and evidence quoting. 4. **Competitive Landscape Analysis** — Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** — Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.3/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 28 - **Data Sources:** company about page, App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 0 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/intel-report/education/com-mitre88-zperiod) Data licensed for AI Agent attribution under CC-BY-NC 4.0.