Comparison

PV Calculator. vs Invoice Generator

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

Head to head
About

PV Calculator.

This tool simplifies solar photovoltaic system design and analysis for professionals and students. It offers a comprehensive Energy Hub with multiple calculators, providing instant results, visual charts, and clear insights for efficient PV system planning and optimization.

Highlights
  • Energy Hub with multiple solar calculators
  • Calculate solar panel power output
  • Analyze energy generation (daily, monthly, yearly)
  • Design solar array size
  • Calculate system voltage and configuration
  • Instant calculation results
  • Visual charts and performance summaries
Features
Read full description

PV Calculator is a smart and easy-to-use solar photovoltaic calculation tool designed for solar professionals, engineers, students, and renewable energy planners. The app provides a complete Energy Hub with multiple solar calculators that help you design, analyze, and optimize PV systems efficiently. With clear inputs, visual charts, and instant results, PV Calculator simplifies complex solar calculations into an intuitive experience. Key Modules & Features: Access all essential PV calculators from a single dashboard for quick system planning. Calculate solar panel power output and view performance distribution with clear visual insights. Analyze daily, monthly, and yearly energy generation with easy-to-read charts. Design solar array size based on system parameters, efficiency, and environmental factors. Calculate required system voltage and electrical configuration for PV installations. Highlights: - Instant calculation results - Visual charts and performance summaries - Clean, modern, and easy UI - Accurate solar PV system planning - Ideal for rooftop and small-scale solar projects - Useful for education, planning, and field reference PV Calculator helps you make informed decisions when designing and evaluating solar photovoltaic systems—quickly, accurately, and confidently. in-app purchase included 
 Lifetime to Remove Ads Privacy Policy : https://docs.google.com/document/d/1Dn1gNdDP2AHL7sg-px4rxdLAcoGHlNB8/edit#heading=h.1ionsc3v3xmq Terms and Condition : https://docs.google.com/document/d/1t-LREPKByKaM0UkbIo4o0E1gdAYs21Oe30EfGxenEss/edit?usp=sharing

About

Invoice Generator

Easily create and send professional invoices with customizable templates and branding. This app simplifies billing for freelancers and small businesses, allowing for quick PDF generation and sharing via email or messaging. Core features work offline, ensuring accessibility for on-the-go professionals.

Highlights
  • Create professional invoices
  • Customizable templates
  • Add business logo and colors
  • Calculate taxes and discounts
  • Offline invoice creation
  • PDF export and sharing
Features
Read full description

Create and send professional invoices in minutes — no accounting degree required. Invoice Generator is built for freelancers, contractors, and small business owners who want to get paid faster without the paperwork. Fill in your details, add line items, pick a template, and share a polished PDF invoice by email, message, or any app. Core invoice features work offline, and invoice data stays on your device. HOW IT WORKS 1. Add your business and customer details 2. Add line items with quantity, price, tax, and discounts 3. Choose a template and brand color 4. Export a pixel-perfect PDF and send it FREE FEATURES • Unlimited invoices and PDF exports • 2 professional templates: Minimalist and Modern • Line items with per-item or invoice-level tax and discounts • 6 currencies: USD, EUR, GBP, INR, CAD, and AUD • Due-date shortcuts for 7, 14, or 30 days • Automatic invoice numbering • Save 1 business profile and 1 customer for reuse • Share using Mail, Messages, AirDrop, Files, or other apps PRO FEATURES • 8 additional premium templates: Corporate, Creative, Elegant, Bold, Studio, Monochrome, Services, and Products • Custom brand colors to match your identity • Add your business logo to every invoice • Duplicate invoices for repeat billing in one tap • Save unlimited businesses and customers BUILT FOR REAL-WORLD BILLING Create invoices for projects, hourly services, daily work, products, or custom units. Add customer contacts, your business address, payment instructions, notes, and terms so clients have everything they need. SMART TOTALS, LESS MANUAL WORK Automatically calculate subtotals, invoice-level and per-item discounts, taxes, and final totals. Choose no tax, invoice tax, or per-item tax. Set issue and due dates, then reuse saved catalog items for repeat work. DESIGNED FOR YOUR BUSINESS Choose a clean layout for simple billing, a bold style for creative work, or an industry template for services and products. Pro users can add a logo and custom accent color for consistent branding. MADE FOR IPHONE AND IPAD Create invoices on the go with iPhone or use the spacious adaptive layout on iPad. Preview the document before export, including invoices spanning multiple PDF pages. Saved drafts remain available when you return. FAST REPEAT WORK Save common line items, businesses, and customer details instead of typing them again. Pro adds invoice duplication and unlimited reusable business and customer profiles. FLEXIBLE PDF SHARING Generate a professional PDF, review it, and share through Mail, Messages, AirDrop, Files, or another compatible app. SIMPLE BY DESIGN No complicated bookkeeping dashboard or lengthy setup. Follow four guided steps: Details, Items, Design, and Review & Send. Clear validation helps complete required information before PDF creation. Ideal for consultants, freelancers, contractors, tutors, photographers, designers, repair professionals, cleaners, shops, and other client-based businesses. Whether you invoice occasionally or manage several businesses, create documents that are clear, consistent, and ready to share. YOUR DATA STAYS YOURS Invoices, businesses, and customers are stored locally on your device. No account is required. SUBSCRIPTION DETAILS Invoice Generator Pro is an auto-renewing subscription. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in Settings > Apple Account > Subscriptions. Any unused portion of a free trial is forfeited when you purchase a subscription. Privacy Policy: https://sites.google.com/view/invoicegeneratorai Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Questions or feedback? Contact info@hexalitics.com

Screenshots

PV Calculator.4 screens
Invoice Generator4 screens

Verdict

The call

The clearest difference is update cadence: Invoice Generator at every 11 days against PV Calculator.'s every 7 months. PV Calculator.'s advantage is iOS requirement (13.0 vs 18.1). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. PV Calculator. sells 1 one-off in-app purchase and Invoice Generator sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

PV Calculator. ships an update every 7 months, Invoice Generator every 11 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
PV Calculator. versus Invoice Generator: the parameters behind the verdict, then further details
ParameterPV Calculator.Invoice Generator
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews—100.0% of reviews
Number of ratings2 — better—
Update frequencyEvery 7 monthsEvery 11 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS13.0 — better18.1
Further details — not scored
Size52 MB49 MB
Age rating4+4+
DeveloperNanjibhai GorasiyaHexalitics Technology Pvt. Ltd.

Customer experience

PV Calculator.

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Invoice Generator

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

PV Calculator.

One-time1
  • Lifetime premium$9.99
3 purchases

Invoice Generator

Subscriptions2
  • Monthly7 Days trial$0.991 Month
  • Annual7 Days trial$9.991 Year
One-time1
  • Lifetime$29.99

Questions

Is PV Calculator. free?
PV Calculator. is free to download, with in-app purchases available.
Is Invoice Generator free?
Invoice Generator is free to download, with in-app purchases available.
Do PV Calculator. or Invoice Generator have ads?
Neither PV Calculator. nor Invoice Generator shows ads.
Which is updated more often, PV Calculator. or Invoice Generator?
PV Calculator. ships an update every 7 months, and Invoice Generator every 11 days. Most recently, PV Calculator. was updated on November 5, 2026 and Invoice Generator on October 31, 2026.

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