Comparison

Invoice Maker by SPK vs Simple Invoice Bill Maker

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

Head to head
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

About

Simple Invoice Bill Maker

Easily create and customize professional PDF invoices on your mobile device. This tool is designed for freelancers and small business owners needing quick and hassle-free billing solutions. Features include custom branding, client management, and automatic tax calculations.

Highlights
  • Quick PDF generation
  • Custom branding
  • Client management
  • Tax and discount calculator
  • On-the-go invoicing
Features
Read full description

Create professional invoices in minutes with our simplest invoice bill maker! Easily customize and generate PDF invoices on the go. Perfect for freelancers, small business owners, and anyone needing fast, hassle-free billing. Key Features: • Quick PDF Generation - Create and share professional invoices instantly • Custom Branding - Add your colors and business details • Client Management - Save customer details for faster invoicing • Tax & Discount Calculator - Automatic calculations for accuracy Perfect for: • Freelancers • Small Business Owners • Contractors • Service Providers • Consultants • Independent Professionals Download now and simplify your invoicing! Terms of Use - https://it-waves.com/terms-and-conditions Privacy policy - https://it-waves.com/apps/privacy-policy

Screenshots

Invoice Maker by SPK4 screens
Simple Invoice Bill Maker4 screens

Verdict

The call

The clearest difference is rating: Invoice Maker by SPK at 4.8 against Simple Invoice Bill Maker's 4.2. Invoice Maker by SPK also leads on ratings volume (911 vs 6) and iOS requirement (13.0 vs 17). On price, review sentiment, update cadence and ads 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. Invoice Maker by SPK sells 9 in-app purchases, starting at $4.99 per month and Simple Invoice Bill Maker sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Invoice Maker by SPK holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Invoice Maker by SPK has 911 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 73% of Invoice Maker by SPK's written reviews are positive against 69% of Simple Invoice Bill Maker's.

UpkeepUpdate frequency

Invoice Maker by SPK ships an update weekly, Simple Invoice Bill Maker every 10 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 7 level
Invoice Maker by SPK versus Simple Invoice Bill Maker: the parameters behind the verdict, then further details
ParameterInvoice Maker by SPKSimple Invoice Bill Maker
PriceFreeFree
Rating4.8 (911 ratings) — better4.2 (6 ratings)
Positive reviews73.3% of reviews — better69.2% of reviews
Number of ratings911 — better6
Update frequencyWeekly — betterEvery 10 days
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, Mac — better
Requires iOS13.0 — better17
Further details — not scored
Size30 MB26 MB
Age rating4+4+
DeveloperSPK Studios LLCIT WAVES

Customer experience

Invoice Maker by SPK

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

Simple Invoice Bill Maker

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews13 reviews
Positive69.2%
Neutral0.0%
Negative30.8%

Bugs and requests

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

Simple Invoice Bill Maker

Not enough reviews yet to summarise bugs or requests.

In-app purchases

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
3 purchases

Simple Invoice Bill Maker

Subscriptions3
  • Premium Weekly$1.997 Days
  • Premium Monthly$3.991 Month
  • Premium Yearly$34.991 Year

Questions

Is Invoice Maker by SPK free?
Invoice Maker by SPK is free to download, with in-app purchases available.
Is Simple Invoice Bill Maker free?
Simple Invoice Bill Maker is free to download, with in-app purchases available.
Which has better reviews, Invoice Maker by SPK or Simple Invoice Bill Maker?
Invoice Maker by SPK is rated higher. Invoice Maker by SPK averages 4.8 out of 5 from 911 ratings, while Simple Invoice Bill Maker averages 4.2 from 6 ratings.
Do Invoice Maker by SPK or Simple Invoice Bill Maker have ads?
Neither Invoice Maker by SPK nor Simple Invoice Bill Maker shows ads.
Which is updated more often, Invoice Maker by SPK or Simple Invoice Bill Maker?
Invoice Maker by SPK ships an update weekly, and Simple Invoice Bill Maker every 10 days. Most recently, Invoice Maker by SPK was updated on October 24, 2026 and Simple Invoice Bill Maker on October 25, 2026.

Other comparisons