Comparison

Billdu vs Invoice Maker Simple

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

Head to head
About

Billdu

Create professional invoices and estimates quickly for your small business. This app helps you get paid faster with online payment options, track expenses by scanning receipts, and manage clients and inventory. It's designed for freelancers and contractors to maintain a professional image and streamline billing.

Highlights
  • Customizable invoice templates
  • Instant estimates and invoices
  • Online payment processing
  • Receipt scanning for expense tracking
  • Client and inventory management
  • Multi-device synchronization
Features
Currently charting
Read full description

Billdu is your all-in-one invoice maker, estimate generator, and billing app designed for small businesses, contractors, and freelancers in the US. Whether you’re creating a simple invoice, a professional estimate, or tracking receipts, Billdu makes it fast, easy, and reliable. Why choose Billdu? • Customizable Invoice Templates – Personalize with your logo, colors, and signature. Choose from professional layouts that impress clients. • Instant Estimates & Invoices – Create and send documents right after the job is done. • Get Paid Faster – Enable Stripe-powered Online Payments to accept credit cards, Apple Pay, Google Pay, and other popular payment methods. • Expense Tracking – Scan receipts, categorize expenses, and keep your business finances organized. • Contractor-Friendly Tools – Perfect for construction, plumbing, electrical, and service-based businesses. • Multi-Device Sync – Access your account and data from iPhone, iPad, or desktop in real-time. • Inventory Management – Track products, manage stock, and add items to invoices in one tap. • Client Management – Store and organize client data, import from contacts, and send reminders. Who Billdu is for? Billdu is perfect for contractors, estimators, and service companies including: painters, concrete, HVAC, roofers, renovators, plumbers, siding, lawn care, construction, electricians, carpenters, flooring, builders, pest control, tile, handymen, landscapers, drywallers, paving, remodeling, arborists, cleaning, general contractors, scaffolding, insulation, pool, EV charger installers and more! Advanced Features: - Attach product images to invoices - Know when an invoice was opened - Connect directly with your accountant - Use offline and sync later - Secure with Face ID or Touch ID - Generate reports and track cash flow Flexible Plans: Try Billdu free for 7 days. Upgrade to Lite, Standard, or Premium for unlimited invoices, estimates, and clients. Billdu helps you save time, get paid faster, and stay organized — all while maintaining a professional image. Terms: https://my.billdu.com/page/condition Privacy: https://my.billdu.com/page/protection

About

Invoice Maker Simple

Easily create and send professional invoices, estimates, and receipts. Track payments, manage expenses, and generate reports to keep your business finances organized. Ideal for freelancers and small business owners.

Highlights
  • Create professional invoices and estimates
  • Track paid, overdue, and unpaid invoices
  • Convert quotes and estimates to invoices
  • Attach photos and signatures
  • Export data to CSV
  • Track income and expenses
  • Generate financial reports
Features
Read full description

** NO SUBSCRIPTION REQUIRED ** Invoice Maker Simple is the easiest way to make and send professional invoices and estimates to your customers. Create invoices and estimates wherever you are - with a customer between jobs, or at home. Get paid faster. It’s perfect for small business owners, contractors, cleaners, freelancers, trades people, construction workers. Simple invoicing will save your precious time. Create, send and track invoices and estimates on your iPhone and iPad and keep your finances and accounting organised. You can simply add your customer’s info with purchased items. You can make simple but professional PDF invoices, quotes, estimates, purchase orders, receipts, timesheets instantly. That’s it. All will be done in minutes rather than hours. It’s so simple. It is also easy to track all invoices, estimates, quotes in one place. Professional looking templates are available for you to suit your business needs. Perfect for small business owners, contractors, cleaners, freelancers, trades people, construction workers. [ Key features of this simple invoice maker app ] • Manually edit titles, subtitles, and currency codes (e.g. Invoice -> Tax Invoice) • Payment term set up based on each customer • Turn quotes, estimates into invoices by a single tap • Check paid, overdue, unpaid invoices • Professionally designed beautiful templates (One simple template, 3 templates with header images) • CSV spreadsheet export to be used in your accounting software • Send PDFs via Email or SMS messenger • Save all PDF files in Apple Files app • Available on iPhone, iPad • Attach photos into invoices, quotes, estimates
• Use payment methods field to enter your payment details such as PayPal, credit card, bank transfer info • Tax, GST, VAT set up (e.g. No tax, single tax, compound tax) • Add discount (Actual $ or %) • Add payment terms (Immediate, 7 days, 14 days, 21 days,...up to 180 days) • Add signature and date on the spot • Simple, crisp, high resolution templates in PDF [ Invoicing and more ] You can also keep track of your business expenses and bills. Both income and expenses are visible in dashboard views in Reports page so that you can keep track of your cash flow. Reporting will be visible monthly, quarterly, yearly. This will benefit you to prepare your Tax and Accounting documents. You can even use this app as receipt tracker and bill tracking organiser because you can attach receipts. Invoice Maker Pro is the ultimate invoice maker. Send simple invoices using professional templates, invoice generator, PDF invoices and estimates, fast payments, bill organiser, receipt and expense tracker, and business cash flow reporting - all in one app. Please download our free invoice app today to see it yourself. You can start a free trial without singing in. All simple and easy. [ Upgrade to subscription version ] Subscription version offers cloud sync and back up feature so that you can save all the info in our highly secured cloud services and share the same data in multiple iOS devices such as iPhone and iPad. Upgrading to subscription version requires auto-renewal subscription. Payment will be charged to your Apple ID account at the confirmation of purchase. The subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase. Links to Your Privacy Policy and Terms of Use: http://invoicemkr.com/privacy.html http://invoicemkr.com/terms.html Please feel free to contact us if you have any questions. Try now! Simple invoicing will save your precious time.

Screenshots

Billdu4 screens
Invoice Maker Simple4 screens

Verdict

The call

The clearest difference is price: Billdu at Free against Invoice Maker Simple's $12.99. Billdu also leads on ratings volume (26K vs 92) and review sentiment (90% vs 74%). Invoice Maker Simple's advantage is update cadence (every 5 days vs every 2 weeks) and iOS requirement (10.0 vs 17.0). On rating, 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

Billdu is free to download; Invoice Maker Simple costs $12.99 up front. Billdu sells 10 in-app purchases, starting at $7.99 per month and Invoice Maker Simple sells 2 in-app purchases, starting at $7.49 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 Billdu against 4.9 for Invoice Maker Simple. That said, the two scores are not equally well evidenced: Billdu has 26K ratings behind it against 92, so its average is the more settled of the two. Written reviews are what separate them: 90% of Billdu's written reviews are positive against 74% of Invoice Maker Simple's.

UpkeepUpdate frequency

Billdu ships an update every 2 weeks, Invoice Maker Simple every 5 days. The most recent releases landed on October 17, 2026 and October 14, 2026 respectively.

Scorecard6 real differences · 5 level
Billdu versus Invoice Maker Simple: the parameters behind the verdict, then further details
ParameterBillduInvoice Maker Simple
PriceFree — better$12.99
Rating4.8 (26K ratings)4.9 (92 ratings) — better
Positive reviews89.9% of reviews — better73.5% of reviews
Number of ratings26K — better92
Update frequencyEvery 2 weeksEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#72 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.010.0 — better
Further details — not scored
Size207 MB44 MB
Age rating4+4+
DeveloperBILLDU LTDB TO J PTY LTD

Customer experience

Billdu

All ratings26,233 ratings
Positive95.9%
Neutral2.0%
Negative2.1%
Written reviews1,232 reviews
Positive89.9%
Neutral2.3%
Negative7.9%

Invoice Maker Simple

All ratings92 ratings
Positive97.8%
Neutral1.1%
Negative1.1%
Written reviews136 reviews
Positive73.5%
Neutral5.1%
Negative21.3%

User reviews

Billdu

From 26K App Store ratings

What we love

  • 🚀 Easy to use
  • 📊 Helpful business features
  • 🖼️ Professional-looking invoices
  • 🕰️ Time-saving
  • 💻 Seamless mobile experience

Room to improve

  • 🐛 Occasional crashes or bugs
  • 🔍 Limited customization options
  • 💳 Billing/payment issues
  • 🕰️ Slow customer support response

Invoice Maker Simple

From 92 App Store ratings

What we love

  • 🚀 Great alternative
  • 🚀 Easy to use
  • 🚀 Convenient invoicing
  • 🚀 Professional-looking invoices
  • 🚀 Keeps track of invoices

Room to improve

  • 🐛 Limited formatting options
  • 🐛 Crashes/bugs after updates
  • 🐛 Difficulty deleting products/services from invoices
  • 🐛 Inability to customize invoice contents
  • 🐛 Lack of cloud sync/backup

Bugs and requests

Billdu

Reported bugs

3 issues
  • Invoices not being received by clients
  • Inconsistent invoice numbering
  • Inability to save draft estimates

Requested features

5 requests
  • Improved date/time handling
  • Ability to transfer data between businesses
  • More customization options for invoices
  • Integrated payment processing
  • Enhanced reporting and analytics

Invoice Maker Simple

Reported bugs

5 issues
  • Crashes when adding new contacts
  • Invoices being sent multiple times
  • Inability to add/edit contacts
  • PDF export issues
  • Inability to delete products from invoices

Requested features

6 requests
  • Ability to customize invoice contents
  • Cloud sync and backup functionality
  • More invoice template options
  • Notification when invoice is read
  • Ability to send invoices via text
Show 1 more
  • Improved accessibility for visually impaired users

In-app purchases

10 purchases

Billdu

Subscriptions10
  • LITE - 1 month$7.991 Month
  • STANDARD (Month)$14.991 Month
  • STANDARD - 1 month$14.991 Month
Show 7 more
  • STANDARD - 1 month7 Days trial$14.991 Month
  • PREMIUM (Month)$27.991 Month
  • PREMIUM - 1 month$27.991 Month
  • 24 invoices$59.991 Year
  • STARTER (Year)$59.991 Year
  • STANDARD (Year)$119.991 Year
  • STANDARD - 12 months$119.991 Year
2 purchases

Invoice Maker Simple

Subscriptions2
  • Monthly Subscription$7.491 Month
  • Yearly Subscription$58.991 Year

Questions

Is Billdu free?
Billdu is free to download, with in-app purchases available.
Is Invoice Maker Simple free?
Invoice Maker Simple costs $12.99, and also offers in-app purchases.
Which has better reviews, Billdu or Invoice Maker Simple?
Invoice Maker Simple is rated higher. Billdu averages 4.8 out of 5 from 26K ratings, while Invoice Maker Simple averages 4.9 from 92 ratings.
Do Billdu or Invoice Maker Simple have ads?
Neither Billdu nor Invoice Maker Simple shows ads.
Which is updated more often, Billdu or Invoice Maker Simple?
Billdu ships an update every 2 weeks, and Invoice Maker Simple every 5 days. Most recently, Billdu was updated on October 17, 2026 and Invoice Maker Simple on October 14, 2026.

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