Comparison

ProBooks vs Invoice Maker by SPK

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

Head to head
About

ProBooks

Create professional invoices and estimates in seconds with this app. It helps manage expenses, track payments, and send bills efficiently. Customize templates and accept various payment methods to streamline your business finances.

Highlights
  • Create invoices and estimates
  • Expense tracking and management
  • Customizable invoice templates
  • Recurring invoice setup
  • Payment processing
  • Receipt generation
  • Client signature capture
Features
Read full description

Streamline Your Finances with ProBooks - Invoice Maker: The Ultimate Invoice Creator and Expense Manager. Create estimates and invoices in seconds with ProBooks, the professional invoice maker and billing app that helps you get paid fast. Discover how ProBooks, the leading bill app & invoice creator, transforms business transactions into a streamlined, efficient process. Crafted for small business owners, freelancers, contractors, and handymen, ProBooks is more than just an invoice app - it's a comprehensive expense manager and invoice/bill organizer that keeps your financials in perfect order. EFFORTLESS INVOICING WITH PROBOOKS - INVOICE MAKER Simplify your accounting with a bill app that generates professional invoices in just a few taps. Use our intuitive invoice creator to produce polished PDF documents that help you get paid quickly while maintaining your brand’s image. As a robust invoice template solution, it allows you to customize designs and convert estimates to invoices instantly. Whether at your office or on-the-go, send invoices via email, text, or any other messaging app. Enjoy instant notifications when clients open your invoices. CUSTOMIZE YOUR INVOICE TEMPLATES With multiple invoice template designs, you can tailor each invoice to fit your brand. Personalize colors and add your logo, or use our innovative AI logo generator for inspiration. ENHANCE CASH FLOW MANAGEMENT Tackle cash flow disruption issues with the ProBooks - Invoice Maker & business expense tracker. Send invoices and estimates promptly while managing payments effectively. Accept payments via debit cards, credit cards (Visa, MasterCard, American Express), bank transfers, checks, or cash. RECURRING INVOICES & BILL TRACKING Set up automated, recurring invoices to ensure timely billing with minimal effort. ProBooks’ bill tracker handles invoices on a weekly, monthly, or yearly schedule, allowing you to focus on growing your business. RELIABLE INVOICE & RECEIPT MAKER ProBooks stands out as the best receipt maker for its ability to generate both once-off and recurring invoices. Customize each invoice with descriptions, quantities, rates, and tax details. Capture client signatures for added authenticity and attach additional documentation as needed. Downloadable PDF invoices make record-keeping straightforward and efficient. EXPENSE TRACKING MADE SIMPLE Harness the power of an advanced expense manager. Easily add and categorize business expenses, monitor spending trends, and track taxes for seamless accounting. Let ProBooks revolutionize how you track invoices and business expenses. ProBooks’ intuitive expense tracking makes it easy to scan receipts using your camera, securely storing them for future reference. 5 Reasons You’ll Love ProBooks - Invoice App 1. Professional Invoice Templates: Stand out with modern designs tailored to your business needs. 2. Fast Payment Processing: Win more projects by getting paid faster compared to other apps. 3. Effortlessly receive payments: Facilitate easy payments with our secure Stripe.com integration, a globally renowned payment processor, enabling your business to accept credit card and bank payments efficiently. 4. Time-Saving Features: Rely on ProBooks for a stress-free invoicing and accounting experience. 5. Manage Invoicing Anywhere: Handle your invoices, estimates, and receipts on-the-go with ease. 6. Trusted by Businesses: Join thousands of satisfied users who rely on our app’s comprehensive solutions. Download ProBooks - Invoice Maker today and experience professional finance management at your fingertips. Start your 30-day risk-free trial and enjoy the full suite of ProBooks features for just $4.99/month or $49.99/year after. Access our full terms at https://ProBooks.com/terms. Should you have any questions or need assistance, our customer support is always ready to help. Contact us at contact@probooks.com and transform your invoicing and expense management with ProBooks today!

About

Invoice Maker by SPK

Create and send professional PDF invoices and estimates quickly and easily. This ad-free, watermark-free app is ideal for small business owners, consultants, and freelancers on the go. Customize templates, track clients, and manage your billing efficiently.

Highlights
  • Create unlimited invoices and estimates
  • No ads or watermarks
  • Customizable invoice fields
  • Client list management
  • Multiple sharing options (email, WhatsApp, text)
  • Convert estimates to invoices
  • Company logo and signature upload
Features
Read full description

Invoice Maker+ is the #1 invoice app available today! It is an award-winning business utility app with NO ADS and NO WATERMARKS. It is the ideal on-the-go mobile solution for small business owners, consultants, contractors, and freelancers in all industries! Our easy-to-use generator allows you to create and send professional PDF invoices and estimates to your customers within seconds. Create invoices and estimates wherever you are! You can send an invoice while in the office, home, car, and even while you are still with your customer! Share via email, WhatsApp, text, print, and more! Our professionally designed template is sophisticated, clean, modern, and attractive, and the customization features allow you to add as much level of detail as you’d like! --- Features: * Create and Share UNLIMITED invoices and estimates with NO ADS and NO WATERMARKS * Select your region preference to customize your currency and date format * Preview via PDF while the invoice or estimate is being created * Customize invoice fields including billing date, due date, item name, item description, quantity, rate, item discount, shipping, tax, overall discount, etc. * Create, track, and store your client list * Deliver via customized email, whatsapp, text, messenger, print, and more * Track and organize your invoices and estimates using our filters and labels (“Outstanding”, “Paid”, “Open”, and “Closed”) * Upload a company logo to personalize your invoices and estimates * Include personal signature * Add payment details (bank transfer, check payable, paypal email) * Convert estimates to invoice with the press of a button * Duplicate an existing invoice or estimate with the press of a button (major time-saver for recurring customers!) * Mark an invoice or estimate as “Draft” if still a work in progress * Store and organize your invoices in one place so filing taxes is quick and easy * Automatically add names to your client list from your phone contacts * Add any additional notes you wish, such as payment terms, company policy, a “Thank You” note, etc. --- Privacy Policy: https://www.iubenda.com/privacy-policy/17124454 Terms and Conditions: https://www.iubenda.com/terms-and-conditions/17124454

Screenshots

ProBooks4 screens
Invoice Maker by SPK4 screens

Verdict

The call

ProBooks and Invoice Maker by SPK both sit at 4.8 stars, but that hides the real split: 88% of ProBooks's written reviews are positive against 73% of Invoice Maker by SPK's. Invoice Maker by SPK's advantage is iOS requirement (13.0 vs 15.1). On price, rating, ratings volume and update cadence 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. ProBooks sells 3 in-app purchases, starting at $4.99 per month and Invoice Maker by SPK sells 9 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for ProBooks against 4.8 for Invoice Maker by SPK. Both are backed by a comparable volume of ratings — 442 and 911 respectively. Written reviews are what separate them: 88% of ProBooks's written reviews are positive against 73% of Invoice Maker by SPK's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
ProBooks versus Invoice Maker by SPK: the parameters behind the verdict, then further details
ParameterProBooksInvoice Maker by SPK
PriceFreeFree
Rating4.8 (442 ratings) — better4.8 (911 ratings)
Positive reviews87.9% of reviews — better73.3% of reviews
Number of ratings442911 — better
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size61 MB30 MB
Age rating4+4+
DeveloperProBooksSPK Studios LLC

Customer experience

ProBooks

All ratings435 ratings
Positive97.2%
Neutral1.4%
Negative1.4%
Written reviews66 reviews
Positive87.9%
Neutral3.0%
Negative9.1%

Invoice Maker by SPK

All ratings906 ratings
Positive95.6%
Neutral1.4%
Negative3.0%
Written reviews30 reviews
Positive73.3%
Neutral10.0%
Negative16.7%

User reviews

ProBooks

From 442 App Store ratings

What we love

  • 👍 User-friendly and intuitive interface
  • 📱 Seamless cross-device syncing (iPhone, iPad, MacBook)
  • 🎨 Professional and customizable invoice templates
  • 💰 Affordable pricing with flexible subscription options
  • ⚡ Quick and easy invoice creation process

Room to improve

  • 🐛 Data loss during app updates (critical issue)
  • 📱 Mobile app has significant glitches and bugs
  • 🔍 Search functionality doesn't find customers reliably
  • ❌ Missing customer names in estimates tab
  • 😞 Inconsistent customer service response times

Invoice Maker by SPK

From 911 App Store ratings

What we love

  • 👍 Easy to use
  • 🚀 Quick and efficient
  • 💡 Helpful features
  • ⭐ Great app overall

Room to improve

  • 🐛 Data loss issues
  • 🔒 Lack of device sync
  • 📝 Limited item descriptions
  • 🔧 Unreliable functionality

Bugs and requests

ProBooks

Reported bugs

9 issues
  • Customer database deletion after forced updates
  • All invoices and profile data disappearing
  • Mobile app query doesn't find customers
  • Estimates tab missing customer names
  • App force logs out after leaving
Show 4 more
  • Credits lost with each update
  • iOS compatibility issues after system updates
  • Mobile app glitches and performance issues
  • App incompatibility after iOS updates with no developer support

Requested features

8 requests
  • Dark mode option
  • Payment method quick options (Zelle, Venmo, Cash App)
  • Horizontal/landscape mode support
  • Automotive shop customization (make, model, year, VIN, license plate)
  • Dashboard restoration or improvement
Show 3 more
  • Better mobile app stability and feature parity with desktop
  • Update notification system for changes and tweaks
  • Inventory management features

Invoice Maker by SPK

Reported bugs

2 issues
  • Invoices not updating correctly
  • Inability to unsubscribe from paid features

Requested features

3 requests
  • Ability to sync data across devices
  • Increased character limit for item descriptions
  • Improved customer support

In-app purchases

3 purchases

ProBooks

Subscriptions2
  • Unlock Everything$4.991 Month
  • Unlock Everything7 Days trial$49.991 Year
One-time1
  • AI Logo Pack$4.99
9 purchases

Invoice Maker by SPK

Subscriptions9
  • My Invoice Generator3 Days trial$4.991 Month
  • The Invoice Maker3 Days trial$7.991 Month
  • Invoice Maker App3 Days trial$9.991 Month
Show 6 more
  • Invoice Maker Pro3 Days trial$9.991 Month
  • Smart Invoice Maker3 Days trial$39.991 Year
  • Quick Invoice Maker3 Days trial$59.991 Year
  • Invoice Maker Professional3 Days trial$69.991 Year
  • App Invoice Maker3 Days trial$89.991 Year
  • Invoice Maker Plus3 Days trial$89.991 Year

Questions

Is ProBooks free?
ProBooks is free to download, with in-app purchases available.
Is Invoice Maker by SPK free?
Invoice Maker by SPK is free to download, with in-app purchases available.
Which has better reviews, ProBooks or Invoice Maker by SPK?
ProBooks is rated higher. ProBooks averages 4.8 out of 5 from 442 ratings, while Invoice Maker by SPK averages 4.8 from 911 ratings.
Do ProBooks or Invoice Maker by SPK have ads?
Neither ProBooks nor Invoice Maker by SPK shows ads.
Which is updated more often, ProBooks or Invoice Maker by SPK?
ProBooks ships an update weekly, and Invoice Maker by SPK weekly. Most recently, ProBooks was updated on October 26, 2026 and Invoice Maker by SPK on October 24, 2026.

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