Home Solar System vs Grid Zero
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Home Solar System
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Welcome to Home Solar System, featuring our exclusive Solar Smash technologyβthe definitive tool for optimizing solar energy systems before the first panel is even installed. Our app simplifies the complex process of designing rooftop solar arrays by combining advanced geospatial data with intuitive engineering tools to smash through inefficiency and maximize your energy yield. SUBSCRIPTION REQUIRED Please note: Home Solar System requires a paid auto-renewable subscription to access its core features and tools. Free app downloads do not include full access without an active subscription. What We Do: Home Solar System allows users to create high-precision layouts for solar panels directly on digital roof models. By integrating real-time sunlight trajectory and local weather data, the app calculates the exact energy potential of any surface. Key Features (Requires Active Subscription): Intelligent Solar Tracking: Analyze the sunβs path throughout the year to identify "sweet spots" on any roof, ensuring maximum exposure. The "Solar Smash" Advantage: Eliminate design inefficiencies and optimize energy yield to maximize return on investment. Efficiency Analytics: Instant calculations on projected energy yield, performance ratios, and potential ROI based on panel models and tilt angles. Custom Project Design: Drag, drop, and rotate panels to fit unique architectural constraints while automatically avoiding shaded areas. Automated Reporting: Generate comprehensive PDF proposals including 3D visualizations, material lists, and estimated carbon savings. Subscription & Purchase Details: Access Model: All features (3D design tools, solar tracking algorithms, ROI calculations, and PDF reporting) are unlocked via a weekly, monthly, or annual subscription. Payment: Payment will be charged to your Apple ID Account at confirmation of purchase. Auto-Renewal: Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Management: You can manage and cancel your subscriptions by going to your App Store Account Settings after purchase. Whether you are a professional installer looking to streamline your workflow or a homeowner planning your transition to clean energy, Home Solar System provides the data-driven confidence you need to go solar. Empower your roof. Maximize your energy. Build the future. Legal Links: Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Grid Zero
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GridZero helps EPC teams go from concept to client-ready solar proposals - faster and with precision. Combining 3D layouts, system optimization, financial analysis, and proposal generation into one continuous workflow. Designed for solar EPC professionals. GridZero is evolving to support the full solar project lifecycle. This app is exclusively available to existing GridZero B2B client organizations. Access is provisioned by GridZero for authorized team members.
Screenshots
Verdict
The clearest difference is in-app purchases: Grid Zero at none against Home Solar System's 2. Grid Zero also leads on iOS requirement (15.1 vs 17.6). On price, update cadence, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Home Solar System sells 2 in-app purchases, starting at $4.99 per month. Grid Zero asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 5 days. Both last shipped on November 9, 2026.
| Parameter | Home Solar System | Grid Zero |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days | Every 5 days |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad | iPhone, iPad, iPod β better |
| Requires iOS | 17.6 | 15.1 β better |
| Further details β not scored | ||
| Size | 11 MB | 56 MB |
| Age rating | +4 | 4+ |
| Developer | Savio Colombo | Gridzero |
In-app purchases
Home Solar System
- Monthly Subscription$4.991 Month
- Yearly Subscription3 Days trial$39.991 Year
Grid Zero
No in-app purchases
Questions
Is Home Solar System free?
Is Grid Zero free?
Do Home Solar System or Grid Zero have ads?
Which is updated more often, Home Solar System or Grid Zero?
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