Billdu vs Estimate Maker Flex
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Customizable invoice templates
- Instant estimates and invoices
- Online payment processing
- Receipt scanning for expense tracking
- Client and inventory management
- Multi-device synchronization
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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
Estimate Maker Flex
Create and send professional estimates quickly and easily. Convert estimates to invoices with a single tap. Customize titles, currencies, and date formats for a personalized touch. Works offline and supports multiple templates.
- Create and send estimates
- Convert estimates to invoices
- Customizable titles and subtitles
- Multi-currency support
- Multiple date formats
- Offline functionality
- Professional templates
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Create and send professional estimates on the spot. Turn estimates into invoices by a single tap. Close more business deals. How it works * Enter your info * Add customers manually or from Contacts * Add your products / services After that, you can create and send professional estimates instantly. Flexibility * Manually edit titles (e.g. Estimate -> estimación, Quote) * Manually edit subtitles (e.g. Billing address -> Bill to, Signature -> Approved by) * Multi-currencies (e.g. \$, £, ... Manually enter your currency code) * Date format (e.g. 04/18/2019, 18/04/2019, 18/Apr/2019) * Works without the internet * Import contacts from your existing contacts or manually create them * Payment term set up based on each customer (7 days by default) * Decimal hours or quantity supported * Five professionally designed beautiful templates * Delete items (e.g. Estimates, products, customers) by swiping to the left * Edit existing documents * Add signature and date on the spot * Icon, Signature, Note, Other comments fields won't appear if nothing is entered * Preview estimates before sending them as a PDF * Send as a PDF or print wirelessly * Create 5 estimates for free Professional Features * Add business registration name (ABN etc.) and number * Tax, GST, VAT set up (e.g. No tax, single tax, compound tax) * Add discount (Actual \$ or %) * Payment terms (Immediate, 7 days, 14 days, 21 days,... up to 180 days) * Add your company logo ### Mobility * Send directly from iPhone and iPad * Your personal estimate system in your pocket ### Upgrade to Subscription Version The subscription version offers cloud sync and backup features so that you can save all the info in our highly secured cloud services and share the same data across multiple iOS devices. Upgrading to the 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://www.btoj.com.au/privacy.html http://www.btoj.com.au/terms.html Please feel free to contact us for anything. Simplify your life now.
Screenshots
Verdict
The clearest difference is ratings volume: Billdu at 26K against Estimate Maker Flex's 101. Billdu also leads on chart position (#70 vs unranked). Estimate Maker Flex's advantage is iOS requirement (13.0 vs 17.0). On price, rating, review sentiment 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
Both are free to download. Billdu sells 10 in-app purchases, starting at $7.99 per month and Estimate Maker Flex sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.8 for Billdu against 4.8 for Estimate Maker Flex. That said, the two scores are not equally well evidenced: Billdu has 26K ratings behind it against 101, so its average is the more settled of the two. Written reviews are what separate them: 89% of Billdu's written reviews are positive against 97% of Estimate Maker Flex's.
Billdu ships an update every 2 weeks, Estimate Maker Flex every 9 days. The most recent releases landed on September 25, 2026 and September 22, 2026 respectively.
| Parameter | Billdu | Estimate Maker Flex |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (26K ratings) | 4.8 (101 ratings) |
| Positive reviews | 89.3% of reviews | 97.2% of reviews — better |
| Number of ratings | 26K — better | 101 |
| Update frequency | Every 2 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | #70 — better | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 205 MB | 99 MB |
| Age rating | 4+ | +4 |
| Developer | BILLDU LTD | B TO J PTY LTD |
Customer experience
Billdu
Estimate Maker Flex
User reviews
Billdu
From 26K App Store ratingsWhat 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
Estimate Maker Flex
From 101 App Store ratingsWhat we love
- 👍 Easy to use
- 🚀 Efficient for creating estimates
- 👍 Practical and functional
- 👍 Professional-looking estimates
- 👍 Helpful for business growth
Room to improve
- ❓ Translation not complete
- ❓ A little difficult to understand initially
- 🐛 App not opening
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
Estimate Maker Flex
Reported bugs
1 issue- App not opening
Requested features
2 requests- Add option to get client signature
- Add signature of the person who made the estimate
In-app purchases
Billdu
- LITE - 1 month$7.991 Month
- STANDARD (Month)$14.991 Month
- STANDARD - 1 month$14.991 Month
Show 7 moreShow fewer
- 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
Estimate Maker Flex
- 1 Month Subscription$5.991 Month
- 1 Year Subscription$49.991 Year
Questions
Is Billdu free?
Is Estimate Maker Flex free?
Which has better reviews, Billdu or Estimate Maker Flex?
Do Billdu or Estimate Maker Flex have ads?
Which is updated more often, Billdu or Estimate Maker Flex?
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