# Sizer App — Solar System Sizing Tool > Professional solar system sizing and design tool for installers and engineers. (iPhone/iPad app by Abisayo Folu-Agoi.) - Source: https://appshunter.io/ios/app/sizer-app/id6760812150 (this page in markdown: same URL + `.md`) - Developer: [Abisayo Folu-Agoi](https://appshunter.io/developer/1886360042) - Category: Productivity - Price: Free - Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 56 MB - Languages: American English - Released: 2026-03-23 - Data updated: 2026-08-27 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/sizer-app/id6760812150/reviews.md ## What is Sizer App? Sizer is a professional-grade solar system sizing application designed to simplify the complex process of designing efficient and safe solar installations. Whether you are a solar installer, engineer, or energy enthusiast, Sizer provides powerful tools to accurately estimate energy requirements and generate complete solar system specifications in minutes. FEATURES • Load Calculator Easily build your energy profile by adding appliances, usage hours, and wattage. Sizer automatically calculates total daily energy consumption and includes system losses for realistic results. • Complete System Design Generate full system requirements including solar panel capacity, battery bank sizing (Ah & kWh), inverter rating, and charge controller specifications. • Protection & Safety Tools Design safer systems with built-in recommendations for DC and AC breakers, surge protection devices (SPD), and professional cable sizing based on electrical safety standards. • Project Management Save and manage multiple solar system configurations. Resume your work anytime and organize projects efficiently. • Secure Access Sign in securely using Email, Google, or Apple to access your data across devices. • Premium Access Unlock unlimited calculations with a subscription designed for professionals. IMPORTANT NOTICE Sizer provides estimation tools intended to guide solar system design. Final installation decisions should always be verified by a qualified professional. Sizer transforms a complex engineering process into a simple, reliable, and efficient workflow — helping you design solar systems faster, safer, and smarter. ## Key features - Load calculator for energy consumption - Complete system design specifications - Protection and safety tools - Project management for multiple configurations - Secure multi-device access - Premium subscription for unlimited calculations ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/sizer-app/id6760812150/reviews.md ### 5/5 — Fantastic app *2026-04-19* The app is actually fantastic all calculations are very accurate now I can talk to different Clint and give accurate quotes ## Frequently asked questions about Sizer App ### What is Sizer App used for? Sizer App is a professional-grade tool designed to simplify the complex process of designing efficient and safe solar installations. It helps users accurately estimate energy requirements and generate complete solar system specifications. ### Does Sizer App have ads? Yes, Sizer App contains advertisements. As a free application, it utilizes ads to support its development and operations. ### What devices does Sizer App support? Sizer App is available on iPhone, iPad, and iPod devices, offering a versatile platform for solar system design on the go. ### How does Sizer App handle project management? Sizer App allows you to save and manage multiple solar system configurations. You can resume your work anytime and organize your projects efficiently, making it easier to track different designs. ### What kind of safety features are included in Sizer App? Sizer App includes protection and safety tools to help design safer systems. It provides recommendations for DC and AC breakers, surge protection devices (SPD), and professional cable sizing based on electrical safety standards. ### Is Sizer App suitable for beginners? While designed for professionals, Sizer App aims to simplify the process. However, the developer notes that final installation decisions should always be verified by a qualified professional. ### How often is Sizer App updated? The latest version of Sizer App is 2.1, which was last updated on May 27, 2026. This indicates a recent update, suggesting ongoing development and support. ### What is the age rating for Sizer App? Sizer App has an age rating of 4+, making it suitable for a wide range of users, including younger individuals interested in energy concepts. ## Version history (last 5 releases) ### 4.0 — 2026-08-26 • Added a guided onboarding experience for new users. • Added a step-by-step calculator walkthrough. • Improved battery sizing with a 50% default DoD for lead-acid batteries. • Added custom DoD settings for lead-acid and lithium-ion batteries. • Added battery installation and safety guidance. • Improved solar system recommendations and user guidance. • General performance improvements and bug fixes. ### 3.0 — 2026-07-24 What’s new: • Quotation company details, logo, and colour preferences are now saved and automatically prefilled. • Improved battery-sizing calculations. • Added notifications when a newer app version is required. • Improved compatibility, stability, and overall performance. ### 2.1 — 2026-05-27 Optimized quotation options to support adding VAT or tax. Added Business Plans for teams and companies Business plan names are now displayed on user profiles You can now create and generate professional quotations with pricing Improved workflow for solar installers and businesses Performance improvements and bug fixes ### 2 — 2026-05-25 Added Business Plans for teams and companies You can now create professional solar quotations directly in the app Generate quotations with pricing automatically included Improved workflow for installers and solar businesses Performance improvements and bug fixes ### 1.53 — 2026-05-19 Fixed an issue affecting manually signed-in users and improved app stability. ## Related topics [sizer app](https://appshunter.io/ios/topics/sizer-app) · [sizer](https://appshunter.io/ios/topics/sizer) --- *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 2026-08-27.*