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.
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.
- 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
Read full descriptionHide 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
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.
- Quick PDF generation
- Custom branding
- Client management
- Tax and discount calculator
- On-the-go invoicing
Read full descriptionHide 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
Verdict
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
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.
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.
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.
| Parameter | Invoice Maker by SPK | Simple Invoice Bill Maker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (911 ratings) — better | 4.2 (6 ratings) |
| Positive reviews | 73.3% of reviews — better | 69.2% of reviews |
| Number of ratings | 911 — better | 6 |
| Update frequency | Weekly — better | Every 10 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, Mac — better |
| Requires iOS | 13.0 — better | 17 |
| Further details — not scored | ||
| Size | 30 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | SPK Studios LLC | IT WAVES |
Customer experience
Invoice Maker by SPK
Simple Invoice Bill Maker
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
Invoice Maker by SPK
- 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 moreShow fewer
- 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
Simple Invoice Bill Maker
- Premium Weekly$1.997 Days
- Premium Monthly$3.991 Month
- Premium Yearly$34.991 Year
Questions
Is Invoice Maker by SPK free?
Is Simple Invoice Bill Maker free?
Which has better reviews, Invoice Maker by SPK or Simple Invoice Bill Maker?
Do Invoice Maker by SPK or Simple Invoice Bill Maker have ads?
Which is updated more often, Invoice Maker by SPK or Simple Invoice Bill Maker?
Other comparisons















