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Billdu: Invoice Estimate Maker

by BILLDU LTD

  • Business
  • Free
View on the App Store
Rating
4.8
26.3K ratings
Top 40%among 268 Business apps
Last update
Oct 15, 2026
Version 26.10.10
Size
217 MB
Category
Business
Tracked since
Oct 9, 2026

Estimated revenue

A model estimate with a likely range, not a reported figure.

$40K/ month

Monthly gross store revenue (USD)

Estimated

Where this falls on the revenue bands

Likely range
$6K–330K
$10K–50K
Confidence
Low confidence
Chart day Oct 24, 2026
From Business grossing #60

Unverified model estimate. Neither Apple nor the developer has published this number, and the real figure can be several times higher or lower. Low confidence: the real figure can be a band higher or lower.

How this estimate is made

Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.

Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.

Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.

Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.

Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.

Full method

Screenshots

As shown on the App Store listing.

About this app

Text from the App Store listing.

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

What’s new

Release notes for the latest version, as written by the developer.

v26.10.10

Smoother sailing this time round.

We've tightened a few things under the hood, ironed out some creases, and sent a handful of bugs on their way. Nothing new to learn, it all just runs that bit sweeter.

Happy invoicing!

Rank history

Daily position in the US charts. #1 is at the top.

Best rank
#54
Current rank
#60
Days charting
7 of 7

On the charts today

Small & simple score

How realistic it is for a small team to build something like this.

55/100

Not flagged as small & simple

  • Developer size40% · 25

    Developer: 3 apps on the charts

  • Audience size0% · 20

    Ratings: 26,262

  • App size25% · 10

    Size: 217 MB

  • Price model80% · 15

    Price model: free with in-app purchases

  • Demand proof100% · 30

    Best rank #3, 100 countries

An indicator, not a fact. We can't see team size. Calculated Oct 24, 2026 · method i2

How the score works

Gap check · UK

Is this US chart app missing in UK?

Already on UK charts

It showed up on a UK chart in the last 30 days, so it is not a gap.

Store not checked yet

This is a candidate, not a verdict. Charts show at most 100 apps, so not charting does not mean no demand. Check the UK store before you decide.

See all gaps

Version history

  • 26.10.10LatestReleased Oct 15, 2026
  • 26.9.20Released Sep 14, 2026