Comparison

Mod Solar vs Grid Zero

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Mod Solar

Features
Read full description

Welcome to Mod Solar - Panel Project, featuring our exclusive Solar Smash technologyβ€”the 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. What we do: Solar Mapping & Projects 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: Intelligent Solar Tracking: We analyze the sun’s path throughout the year to identify the "sweet spots" on any roof, ensuring maximum exposure. The "Solar Smash" Advantage: Smash through high utility bills and energy waste. Our Solar Smash algorithm identifies and eliminates design inefficiencies, ensuring your project delivers the highest possible output for your investment. Efficiency Analytics: Get instant calculations on projected energy yield, performance ratios, and potential ROI based on specific 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 for clients, including 3D visualizations, material lists, and estimated carbon savings. Whether you are a professional installer looking to streamline your workflow or a homeowner planning your transition to clean energy, Solar Mapping & Projects provides the data-driven confidence you need to go solar. Empower your roof. Maximize your energy. Build the future.

About

Grid Zero

Features
Read full description

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

Mod Solar4 screens
Grid Zero4 screens

Verdict

The call

The clearest difference is in-app purchases: Grid Zero at none against Mod Solar'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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Mod Solar sells 2 in-app purchases, starting at $0.99 per 7 days. Grid Zero asks for nothing beyond the download.

UpkeepUpdate frequency

Mod Solar ships an update weekly, Grid Zero every 5 days. The most recent releases landed on September 14, 2026 and September 24, 2026 respectively.

Scorecard2 real differences Β· 4 level
Mod Solar versus Grid Zero: the parameters behind the verdict, then further details
ParameterMod SolarGrid Zero
PriceFreeFree
Update frequencyWeeklyEvery 5 days β€” better
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhone, iPadiPhone, iPad, iPod β€” better
Requires iOS17.615.1 β€” better
Further details β€” not scored
Size5 MB55 MB
Age rating4+4+
DeveloperSavio ColomboGridzero

In-app purchases

2 purchases

Mod Solar

Subscriptions2
  • Weekly Subscription$0.997 Days
  • Monthly Subscription$2.991 Month
None

Grid Zero

No in-app purchases

Questions

Is Mod Solar free?
Mod Solar is free to download, with in-app purchases available.
Is Grid Zero free?
Grid Zero is free to download, with no in-app purchases.
Do Mod Solar or Grid Zero have ads?
Neither Mod Solar nor Grid Zero shows ads.
Which is updated more often, Mod Solar or Grid Zero?
Mod Solar ships an update weekly, and Grid Zero every 5 days. Most recently, Mod Solar was updated on September 14, 2026 and Grid Zero on September 24, 2026.

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